HGST HUH728080AL5200 Service Manual

Hard disk drive specifications

Model:

HUH728080AL5200/1/4/5
HUH728080AL4200/1/4/5

HUH728060AL5200/1/4/5
HUH728060AL4200/1/4/5

HGST Ultrastar He

8

3.5 inch Serial Attached SCSI hard disk drive

Revision 1.8 20 December 2016

HGST Hard Disk Drive Specification

1

Publication Disclaimer Information

One MB is equal to one million bytes, one GB is equal to one billion bytes and one TB equals 1,000GB (one trillion bytes)
when referring to storage capacity. Accessible capacity will vary from the stated capacity due to formatting and partitioning

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Corporation intends to announce such HGST products, programming, or services in your country. Technical information
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for additional information on product specifications. Pictures shown may vary from actual products.

HGST Hard Disk Drive Specification

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Table of contents

Introduction ........................................................................................................................................ 18

Glossary ............................................................................................................................................... 18

General caution .................................................................................................................................. 19

References ........................................................................................................................................... 19

Part 1. Functional specification ....................................................................................................................... 21

Control Electronics ............................................................................................................................. 22

Head disk assembly ............................................................................................................................ 22

Actuator ............................................................................................................................................... 22

Default logical drive parameters ....................................................................................................... 23

Data sheet ........................................................................................................................................... 25

World Wide Name Assignment .......................................................................................................... 25

Drive organization .............................................................................................................................. 26

Drive Format .................................................................................................................................... 26

Cylinder allocation ........................................................................................................................... 26

Performance characteristics .............................................................................................................. 26

Command overhead ......................................................................................................................... 26

Mechanical positioning .................................................................................................................... 27

Drive ready time .............................................................................................................................. 27

Operating modes .............................................................................................................................. 28

Shipped format ................................................................................................................................... 29

Electrical interface ............................................................................................................................. 30

Connector location ........................................................................................................................... 30

29 pin Serial Attached SCSI (SAS) Connector Definition ............................................................. 31

Voltage and Ground Signals ........................................................................................................... 32

Ready LED output ........................................................................................................................... 32

Environment ....................................................................................................................................... 33

Temperature and humidity ............................................................................................................. 33

Corrosion test ................................................................................................................................... 34

Atmospheric condition ..................................................................................................................... 34

DC power requirements ..................................................................................................................... 35

Input voltage .................................................................................................................................... 35

Power supply current (typical1) ...................................................................................................... 36

Power supply generated ripple at drive power connector ............................................................. 37

Power Consumption Efficiency ....................................................................................................... 37

Reliability ............................................................................................................................................ 38

Data integrity ................................................................................................................................... 38

Cable noise interference .................................................................................................................. 38

Load/Unload ..................................................................................................................................... 38

Start/stop cycles ............................................................................................................................... 38

Preventive maintenance .................................................................................................................. 38

Data reliability ................................................................................................................................. 38

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Required Power-Off Sequence ......................................................................................................... 38

Mechanical specifications .................................................................................................................. 39

Physical dimensions ......................................................................................................................... 39

Connector locations .......................................................................................................................... 41

Drive mounting ................................................................................................................................ 41

Heads unload and actuator lock ..................................................................................................... 41

Vibration and shock ............................................................................................................................ 42

Operating vibration ......................................................................................................................... 42

Nonoperating vibration ................................................................................................................... 43

Operating shock ............................................................................................................................... 43

Nonoperating shock ......................................................................................................................... 43

Nonoperating Rotational shock....................................................................................................... 44

Acoustics.............................................................................................................................................. 45

Identification labels ............................................................................................................................ 45

Safety ................................................................................................................................................... 46

UL and CSA standard conformity................................................................................................... 46

German Safety Mark ....................................................................................................................... 46

Flammability .................................................................................................................................... 46

Safe handling.................................................................................................................................... 46

Substance restriction requirements ............................................................................................... 46

Secondary circuit protection ............................................................................................................ 46

Electromagnetic compatibility ........................................................................................................... 47

CE Mark ........................................................................................................................................... 47

C-Tick Mark ...................................................................................................................................... 47

BSMI Mark ....................................................................................................................................... 47

KC Mark ........................................................................................................................................... 47

Part 2. Interface specification .......................................................................................................................... 48

General ................................................................................................................................................ 49

SAS Features ...................................................................................................................................... 49

SAS Names and Identifiers ............................................................................................................... 51

PHY Layer .......................................................................................................................................... 53

Link Reset Sequence ........................................................................................................................ 53

Hard Reset ........................................................................................................................................ 53

SAS OOB (Out of Band) .................................................................................................................. 54

SAS Speed Negotiation .................................................................................................................... 54

PHY Error Handling ........................................................................................................................ 55

Link Layer ........................................................................................................................................... 56

Address Frames ............................................................................................................................... 56

Link Layer Error Handling ............................................................................................................. 59

Transport Layer .................................................................................................................................. 61

Command Information Unit ............................................................................................................ 62

TASK Information Units ................................................................................................................. 63

XFER_RDY Information Units ....................................................................................................... 64

DATA Information Units ................................................................................................................. 64

RESPONSE Information Units ...................................................................................................... 65

Sequences of SSP Information Units .............................................................................................. 67

Transport Layer Error Handling .................................................................................................... 68

SCSI Control Byte .............................................................................................................................. 71

Abbreviations ...................................................................................................................................... 71

Byte ordering conventions ................................................................................................................. 71

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FORMAT UNIT (04) ........................................................................................................................... 72

Parameter List Header .................................................................................................................... 74

Initialization Pattern ....................................................................................................................... 76

Defect Descriptor.............................................................................................................................. 77

INQUIRY (12) ..................................................................................................................................... 80

Inquiry Data ..................................................................................................................................... 81

LOG SELECT (4C) ............................................................................................................................. 98

LOG SENSE (4D) ............................................................................................................................. 101

Log Page Parameters ..................................................................................................................... 102

Log Sense Page 0 ............................................................................................................................ 103

Log Sense Page 2 ............................................................................................................................ 104

Log Sense Page 3 ............................................................................................................................ 105

Log Sense Page 5 ............................................................................................................................ 106

Log Sense Page 6 ............................................................................................................................ 107

Log Sense Page D ........................................................................................................................... 107

Log Sense Page E ........................................................................................................................... 108

Log Sense Page F ........................................................................................................................... 109

Log Sense Page 10........................................................................................................................... 110

Log Sense Page 15........................................................................................................................... 112

Log Sense Page 18........................................................................................................................... 114

Log Sense Page 19h - General Statistics and Performance ......................................................... 118

Log Sense Page 1A ......................................................................................................................... 120

Log Sense Page 2F ......................................................................................................................... 121

Log Sense Page 30.......................................................................................................................... 122

Log Sense Page 37.......................................................................................................................... 125

MODE SELECT (15) ........................................................................................................................ 126

MODE SELECT (55) ........................................................................................................................ 127

MODE SENSE (1A) .......................................................................................................................... 128

Mode Parameter List ..................................................................................................................... 130

Mode Page 00 (Vendor Unique Parameters) ................................................................................ 133

Mode Page 01 (Read/Write Error Recovery Parameters) ............................................................ 135

Mode Page 02 (Disconnect/Reconnect Parameters) ..................................................................... 139

Mode Page 03 (Format Device Parameters) ................................................................................ 140

Mode Page 04 (Rigid Disk Drive Geometry Parameters) ........................................................... 142

Mode Page 07 (Verify Error Recovery Parameters) ..................................................................... 143

Mode Page 08 (Caching Parameters) ........................................................................................... 144

Mode Page 0A (Control Mode Page Parameters) ......................................................................... 146

Mode Page 0C (Notch Parameters) ............................................................................................... 150

Mode Page 18h ............................................................................................................................... 151

Mode Page 19h (Port Control Parameters) .................................................................................. 152

Mode Page 1A (Power Control) ..................................................................................................... 158

Mode Page 1C (Informational Exceptions Control) ..................................................................... 161

MODE SENSE (5A) .......................................................................................................................... 164

PERSISTENT RESERVE IN (5E) ................................................................................................... 165

Service Action ................................................................................................................................. 165

Parameter data for Read Keys ...................................................................................................... 166

Parameter Data for Read Reservations ....................................................................................... 167

PERSISTENT RESERVE OUT (5F) ............................................................................................... 168

Service Action ................................................................................................................................. 168

Type ................................................................................................................................................. 169

Parameter list ................................................................................................................................ 170

Summary ........................................................................................................................................ 171

PRE-FETCH (34) .............................................................................................................................. 172

PRE-FETCH (90) .............................................................................................................................. 173

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READ (6) - (08) ................................................................................................................................. 174

READ (10) - (28) ............................................................................................................................... 175

READ (12) - (A8) ............................................................................................................................... 177

READ (16) - (88) ............................................................................................................................... 178

READ (32) - (7F/09) .......................................................................................................................... 179

READ BUFFER (3C) ........................................................................................................................ 180

Combined Header And Data (Mode 00000b) ................................................................................ 180

Read Data (Mode 00010b) ............................................................................................................. 181

Descriptor (Mode 00011b) .............................................................................................................. 181

Read Data from Echo Buffer (Mode 01010b) ............................................................................... 181

Echo Buffer Descriptor (Mode 01011b) ......................................................................................... 182

Expander Communications and Echo Buffer (Mode 11010b) ..................................................... 182

Error History (Mode 11100b)......................................................................................................... 182

READ CAPACITY (10) - (25) ........................................................................................................... 184

Returned Data Format .................................................................................................................. 184

READ CAPACITY (16) (9E/10) ........................................................................................................ 185

Returned Data Format .................................................................................................................. 185

READ DEFECT DATA (37) .............................................................................................................. 186

Defect List Header ......................................................................................................................... 187

Defect List Descriptor .................................................................................................................... 187

Bytes from Index Format (100b) ................................................................................................... 187

Physical Sector Format (101b) ...................................................................................................... 187

READ DEFECT DATA (B7) ............................................................................................................. 189

Defect List Header ......................................................................................................................... 189

Defect List Descriptor .................................................................................................................... 189

Bytes from Index Format (100b) ................................................................................................... 190

Physical Sector Format (101b) ...................................................................................................... 190

READ LONG (3E) ............................................................................................................................ 191

READ LONG (9E) ............................................................................................................................ 192

REASSIGN BLOCKS (07) ............................................................................................................... 193

RECEIVE DIAGNOSTICS RESULTS (1C) .................................................................................... 194

Receive Diagnostic Results Page 0 ............................................................................................... 194

Receive Diagnostic Results Page 40 ............................................................................................. 195

LEASE (17) ....................................................................................................................................... 196

RELEASE (57) .................................................................................................................................. 197

REPORT DEVICE IDENTIFIER (A3/05) ....................................................................................... 198

REPORT LUNS (A0) ........................................................................................................................ 199

REPORT SUPPORTED OPERATION CODES (A3/0C) ................................................................ 200

All_commands parameter data format ......................................................................................... 202

One_command parameter data format ........................................................................................ 203

Command timeouts descriptor format.......................................................................................... 204

REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS (A3/0D) ..................................... 205

REPORT TIMESTAMP (A3/0F) ...................................................................................................... 207

Device clocks and timestamps....................................................................................................... 208

REQUEST SENSE (03) .................................................................................................................... 209

RESERVE (16) .................................................................................................................................. 210

RESERVE (56) ................................................................................................................................... 211

REZERO UNIT (01) ......................................................................................................................... 212

SANITIZE (48) .................................................................................................................................. 213

Sanitize (48) Service Action Codes ................................................................................................ 214

SECURITY PROTOCOL IN (A2) .................................................................................................... 215

SECURITY PROTOCOL OUT (B5) ................................................................................................ 216

SEND DIAGNOSTIC (1D) ............................................................................................................... 217

Send Diagnostic Page 0 ................................................................................................................. 218

HGST Hard Disk Drive Specification

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Send Diagnostic Page 3F ............................................................................................................... 218

Send Diagnostic Page 40 ............................................................................................................... 220

SET DEVICE IDENTIFIER (A4/06) ............................................................................................... 221

SET TIMESTAMP (A4/0F) .............................................................................................................. 222

START STOP UNIT (1B) ................................................................................................................. 223

SYNCHRONIZE CACHE (10) - (35) ............................................................................................... 225

SYNCHRONIZE CACHE (16) - (91) ............................................................................................... 226

TEST UNIT READY (00) ................................................................................................................. 227

VERIFY (10) - (2F) ........................................................................................................................... 228

VERIFY (12) - (AF) ........................................................................................................................... 230

VERIFY (16) - (8F) ........................................................................................................................... 231

VERIFY (32) - (7F/0A) ...................................................................................................................... 232

WRITE (6) - (0A) ............................................................................................................................... 233

WRITE (10) - (2A) ............................................................................................................................. 234

WRITE (12) - (AA) ............................................................................................................................ 236

WRITE (16) - (8A) ............................................................................................................................. 237

WRITE (32) - (7F/0B) ....................................................................................................................... 238

WRITE AND VERIFY (10) - (2E) .................................................................................................... 239

WRITE AND VERIFY (12) - (AE) .................................................................................................... 240

WRITE AND VERIFY (16) - (8E) .................................................................................................... 241

WRITE AND VERIFY (32) - (7F/0C) ............................................................................................... 242

WRITE BUFFER (3B) ...................................................................................................................... 243

Combined Header And Data (Mode 00000b) ................................................................................ 243

Write Data (Mode 00010b) ............................................................................................................ 244

Download Microcode (Mode 00100b) ............................................................................................ 244

Download Microcode and Save (Mode 00101b) -Single Binary File ........................................... 245

Download Microcode and Save (Mode 00111b) - Multiple Binary Files ..................................... 245

Write Data to Echo Buffer (Mode 01010b) ................................................................................... 245

Download Microcode with Offsets, Select Activation Events, Save, and Defer Activate (Mode

01101b) ............................................................................................................................................ 246

Download Microcode with Offsets, Save, and Defer Activate (Mode 01110b) ........................... 246

Activate Deferred Microcode Mode (Mode 01111b) ...................................................................... 246

Enable Expander Communications Protocol (Mode 11010b) ...................................................... 246

WRITE LONG (10) (3F)................................................................................................................. 247

WRITE LONG (16) - (9F) ................................................................................................................. 248

WRITE SAME (10) - (41) ................................................................................................................. 249

WRITE SAME (16) - (93) ................................................................................................................. 250

WRITE SAME (32) - (7F/0D) ........................................................................................................... 251

SCSI Protocol .................................................................................................................................... 253

Priority of SCSI Status Byte Reporting ....................................................................................... 253

Invalid LUN Processing ................................................................................................................ 253

Overlapped Commands ................................................................................................................. 254

Command Processing During Execution of Active I/O Process .................................................. 254

Unit Attention Condition ............................................................................................................... 255

Command Processing During Startup and Format Operations ................................................. 256

Internal Error Condition ............................................................................................................... 256

Deferred Error Condition .............................................................................................................. 257

Degraded Mode .............................................................................................................................. 257

Command Processing while Reserved .......................................................................................... 260

Priority Commands .......................................................................................................................... 261

Command Queuing ........................................................................................................................... 261

HGST Hard Disk Drive Specification

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Queue Depth ................................................................................................................................... 261

Queue Full Status .......................................................................................................................... 261

Termination of I/O Processes......................................................................................................... 261

Command Reordering ...................................................................................................................... 262

Concurrent I/O Process .................................................................................................................... 262

Write Cache ....................................................................................................................................... 262

Automatic Rewrite/Reallocate ......................................................................................................... 263

Segmented Caching .......................................................................................................................... 264

Overview ......................................................................................................................................... 264

Read Ahead ..................................................................................................................................... 264

Multiple Initiator Systems............................................................................................................... 264

Sense Data ...................................................................................................................................... 264

Mode Pages ..................................................................................................................................... 264

Multiple Initiator Environment ...................................................................................................... 264

Initiator Sense Data ...................................................................................................................... 264

Initiator Mode Select/Mode Sense Parameters............................................................................ 264

Reset .................................................................................................................................................. 265

Initiator Sense Data ...................................................................................................................... 265

Reset Actions .................................................................................................................................. 265

Diagnostics ........................................................................................................................................ 266

Power on Diagnostics ..................................................................................................................... 266

Self-test via SEND DIAGNOSTIC Command ............................................................................. 266

Idle Time Function ........................................................................................................................... 269

Command Time out Limits .............................................................................................................. 269

Reassignment Time ....................................................................................................................... 269

Format Time ................................................................................................................................... 269

Start/Stop Unit Time ..................................................................................................................... 269

Medium Access Command Time ................................................................................................... 269

Time-out Limits for Other Commands ......................................................................................... 270

Recommended Initiator ERP ........................................................................................................... 271

Drive Service Strategy ................................................................................................................... 271

Recommendations for System Error Log ..................................................................................... 271

Data Recovery Procedure .............................................................................................................. 272

Non data Error Recovery Procedure ............................................................................................. 273

RAID Rebuild Assist ......................................................................................................................... 279

Rebuild Assist diagnostic page ...................................................................................................... 279

Referenced Specifications and Standards....................................................................................... 281

TCG Specifications ......................................................................................................................... 281

Federal Information Processing Standards (FIPS) ..................................................................... 281

National Institute of Standards and Technology (NIST) ............................................................ 281

Department of Defense .................................................................................................................. 282

RSA Laboratories Standards ......................................................................................................... 282

Other Standards............................................................................................................................. 282

Implementation Exceptions ............................................................................................................. 282

Implementation Features and Details Outside of TCG Specifications ........................................ 282

Encryption Algorithms ..................................................................................................................... 283

Advanced Encryption Standard (AES) Support .......................................................................... 283

‘Level 0 Discovery’ Vendor Specific Data ...................................................................................... 283

Deterministic Random Bit Generation (DRBG) .......................................................................... 284

Key Wrap ........................................................................................................................................ 284

Key Erasure .................................................................................................................................... 284

TCG SSC Tables ............................................................................................................................... 285

‘Admin SP’ C_PIN and ‘Locking SP’ C_PIN Tables ..................................................................... 285

HGST Hard Disk Drive Specification

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K_AES_256 Table ........................................................................................................................... 285

‘Locking SP’ Access Control Table ................................................................................................. 286

‘Locking Info’ Table ........................................................................................................................ 286

‘Locking SP’ Locking Table ............................................................................................................ 286

Firmware Download and Signing.................................................................................................... 287

Revert Feature .................................................................................................................................. 287

Ports .................................................................................................................................................. 288

MSID ................................................................................................................................................. 291

Logging .............................................................................................................................................. 291

Number of Sessions .......................................................................................................................... 291

Number of Bands .............................................................................................................................. 291

Number of COMIDs.......................................................................................................................... 291

Locked and Unlocked Behavior ....................................................................................................... 292

T10 SCSI Commands ..................................................................................................................... 292

TCG SSC Commands ..................................................................................................................... 294

Error Codes ....................................................................................................................................... 296

Customer Specific Requirements .................................................................................................... 296

FIPS140 Cryptographic Officer Instructions ................................................................................. 297

Physical Security ............................................................................................................................ 297

Security Protocol Parameters ....................................................................................................... 297

Certified Models, Hardware Versions and Firmware Versions .................................................. 302

Cryptographic Module Acceptance and Provisioning .................................................................. 302

Zeroization of the Cryptographic Module ..................................................................................... 302

SCSI Sense Data Format Introduction ........................................................................................... 303

Sense Data Format ........................................................................................................................ 303

Sense Data Length ......................................................................................................................... 303

Sense Data Response Code ............................................................................................................ 303

Fixed Format Sense Data ................................................................................................................ 304

Valid (Bit 7 of byte 0) ..................................................................................................................... 304

Response Code (Bit 6 - 0 of byte 0) ............................................................................................... 304

ILI: Incorrect Length Indicator (Bit 5 of byte 2) .......................................................................... 305

Sense Key (Bit 3 - 0 of byte 2) ....................................................................................................... 305

Information Bytes (Byte 3 through 6) .......................................................................................... 306

Additional Sense Length (Byte 7) ................................................................................................. 306

Command Specific Information (Byte 8 through 11) ................................................................... 306

Additional Sense Code/Qualifier (Byte 12 and 13) ...................................................................... 307

FRU: Field Replaceable Unit (Byte 14) ........................................................................................ 330

Sense Key Specific (Byte 15 through 17) ...................................................................................... 330

Reserved (Byte 18 through 19) ...................................................................................................... 332

Vendor unique error information (Byte 20 through 23) .............................................................. 332

Physical Error Record (Product Specific Information) (Byte 24 through 29) ............................ 332

Descriptor Format Sense Data ........................................................................................................ 333

Order of Sense Descriptors ............................................................................................................ 334

Sense Data Descriptor Definitions ............................................................................................... 335

HGST Hard Disk Drive Specification

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List of tables

Table 1 Type and Model# ............................................................................................................................... 18

Table 2 Formatted capacity ........................................................................................................................... 24

Table 3 Mechanical positioning performance (Sector format of 4k bytes/sector) ...................................... 25

Table 4 World Wide Name Assignment ........................................................................................................ 25

Table 5 Command overhead .......................................................................................................................... 26

Table 6 Average seek time ............................................................................................................................. 27

Table 7 Single Track Seek Time .................................................................................................................... 27

Table 8 Latency Time ..................................................................................................................................... 27

Table 9 Drive ready time ................................................................................................................................ 27

Table 10 Mode transition times ..................................................................................................................... 28

Table 11 29-pin Connector Signal Definition ................................................................................................ 31

Table 12 Temperature and humidity ............................................................................................................ 33

Table 13 Input voltage.................................................................................................................................... 35

Table 14 SAS power consumption ................................................................................................................. 36

Table 15 Power supply generated ripple at drive power connector ............................................................ 37

Table 16 Power consumption efficiency ........................................................................................................ 37

Table 17 Physical Dimensions ....................................................................................................................... 40

Table 18 Random vibration PSD profile break points (operating) .............................................................. 42

Table 19 Random vibration (Rotational) PSD profile break points ............................................................ 42

Table 20 Random vibration PSD profile break points (nonoperating) ....................................................... 43

Table 21 Sinusoidal shock wave .................................................................................................................... 43

Table 22 Rotational Shock ............................................................................................................................. 44

Table 23 Sound power levels .......................................................................................................................... 45

Table 24 Names and Identifiers .................................................................................................................... 51

Table 25 SAS Address Format ....................................................................................................................... 51

Table 26 IEEE Registered Name Format ..................................................................................................... 51

Table 27 Name Address Authority field ........................................................................................................ 52

Table 28 SAS Speed Negotiation ................................................................................................................... 54

Table 29 Supported Settings Bit Priorities ................................................................................................... 55

Table 30 PHY Layer Error Handling ............................................................................................................ 55

Table 31 Address Frame Format ................................................................................................................... 56

Table 32 Frame Type: ..................................................................................................................................... 56

Table 33 Identify Address Frame .................................................................................................................. 57

Table 34 Reason Field .................................................................................................................................... 58

Table 35 Open Address Frame Format ......................................................................................................... 58

Table 36 Link Layer Error Handling (part 1 of 2) ....................................................................................... 59

Table 37 Link Layer Error Handling (part 2 of 2) ....................................................................................... 60

Table 38 SAS Frame Format ......................................................................................................................... 61

Table 39 FRAME TYPE Field ........................................................................................................................ 61

Table 40 COMMAND Information Unit ....................................................................................................... 62

Table 41 Task Attribute Field ........................................................................................................................ 62

Table 42 TASK Information Unit .................................................................................................................. 63

Table 43 TASK MANAGEMENT FUNCTION Field ................................................................................... 63

Table 44 Additional Response Information Argument for Query Async Event ......................................... 64

Table 45 UADE DEPTH Field ....................................................................................................................... 64

Table 46 XFER_RDY Information Units ...................................................................................................... 64

Table 47 Data Information Unit .................................................................................................................... 64

Table 48 Response Information Unit ............................................................................................................ 65

Table 49 RETRY DELAY TIMER Field (part 1 of 2) .................................................................................... 65

Table 50 RETRY DELAY TIMER Field (part 2 of 2) .................................................................................... 65

Table 51 DATAPRES Field ............................................................................................................................ 66

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Table 52 RESPONSE Data ............................................................................................................................ 66

Table 53 RESPONSE Codes .......................................................................................................................... 66

Table 54 Transport Layer Error Handling ................................................................................................... 68

Table 55 SCSI Commands Supported (part 1 of 2) ...................................................................................... 69

Table 56 SCSI Commands Supported (part 2 of 2) ...................................................................................... 70

Table 57 SCSI Control Byte ........................................................................................................................... 71

Table 58 FORMAT UNIT ............................................................................................................................... 72

Table 59 Format of the Short Parameter List Header ................................................................................ 74

Table 60 Format of the Long Parameter List Header ................................................................................. 74

Table 61 Format of the Long Parameter List Header ................................................................................. 74

Table 62 Data Format with Protection field ................................................................................................. 75

Table 63 Initialization Pattern Descriptor ................................................................................................... 76

Table 64 Defect Descriptor - Block Format (for n + 1 defects) .................................................................... 77

Table 65 Defect Descriptor - Bytes from Index Format (for n = 1 defects) ................................................. 78

Table 66 Defect Descriptor - Physical Sector Format (for n + 1 defects) .................................................... 78

Table 67 INQUIRY (12) .................................................................................................................................. 80

Table 68 Page Code descriptions ................................................................................................................... 80

Table 69 Inquiry Data- EVPD = 0 ................................................................................................................. 81

Table 70 Inquiry Data - EVPD = 1 (Page Code = 00h) ................................................................................ 83

Table 71 Inquiry Data - EVPD = 1 (Page Code = 03h) ................................................................................ 84

Table 72 Inquiry Data - EVPD = 1 (Page Code = 80h) ................................................................................ 85

Table 73 Inquiry Data Format - EVPD = 1, (Page Code - 83h) ................................................................... 86

Table 74 Inquiry Data Format - EVPD = 1, (Page Code - 86h) ................................................................... 88

Table 75 Inquiry Data Format - EVPD = 1, (Page Code - 87h) ................................................................... 89

Table 76 Inquiry Data Format - EVPD = 1, (Page Code - 88h) ................................................................... 90

Table 77 Inquiry Data Format - EVPD = 1, (Page Code - 8Ah) .................................................................. 91

Table 78 Inquiry Data - EVPD = 1 (Page Code = 90h) ................................................................................ 92

Table 79 Protocol-specific logical unit information descriptor .................................................................... 92

Table 80 Protocol Specific Port Information VPD page to SAS SSP ........................................................... 93

Table 81 Port Information Descriptor for SAS SSP ..................................................................................... 93

Table 82 SAS PHY Information Descriptor for SAS SSP ............................................................................ 93

Table 83 Inquiry Data - EVPD = 1 (Page Code = B0h) ................................................................................ 94

Table 84 Inquiry Data - EVPD = 1 (Page Code = B1h) ................................................................................ 95

Table 85 Inquiry Data - EVPD = 1 (Page Code = B2h) ................................................................................ 96

Table 86 Inquiry Data - EVPD = 1 (Page Code = D1h) ................................................................................ 96

Table 87 Inquiry Data - EVPD = 1 (Page Code = D2h) ................................................................................ 97

Table 88 Log Select (4C) ................................................................................................................................. 98

Table 89 Log Sense (4D) ............................................................................................................................... 101

Table 90 Log Sense Page 0 ........................................................................................................................... 103

Table 91 Log Sense Page 2 ........................................................................................................................... 104

Table 92 Log Sense Page 3 ........................................................................................................................... 105

Table 93 Log Sense Page 5 ........................................................................................................................... 106

Table 94 Log Sense Page 6 ........................................................................................................................... 107

Table 95 Log Sense Page D .......................................................................................................................... 107

Table 96 Log Sense Page E .......................................................................................................................... 108

Table 97 Log Sense Page F .......................................................................................................................... 109

Table 98 Log Sense Page F, Application Client Log ................................................................................... 109

Table 99 Log Sense Page 10 .......................................................................................................................... 110

Table 100 Log Sense Page 10, self-test results ............................................................................................ 110

Table 101 Log Sense Page 10, self-test results ............................................................................................ 111

Table 102 Log Sense Page 10, Extended Segment Number ....................................................................... 111

Table 103 Log Sense Page 15 ........................................................................................................................ 112

Table 104 BMS Status Parameter structure ............................................................................................... 112

Table 105 BMS Status ................................................................................................................................... 112

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Table 106 Medium Scan Parameter structure ............................................................................................ 113

Table 107 Reassign Status ............................................................................................................................ 113

Table 108 Log Sense Page 18 ........................................................................................................................ 114

Table 109 SAS Log Descriptor (part 1 of 3) ................................................................................................. 114

Table 110 SAS Log Descriptor (part 2 of 3) ................................................................................................. 115

Table 111 SAS Log Descriptor (part 3 of 3) .................................................................................................. 116

Table 112 Log Sense Page 19h - General Statistics and Performance ...................................................... 118

Table 113 Time Interval Descriptor ............................................................................................................. 119

Table 114 Log Sense Page 1A ...................................................................................................................... 120

Table 115 Log Sense Page 2F....................................................................................................................... 121

Table 116 Log Sense Page 30 ....................................................................................................................... 122

Table 117 Log Sense Page 37 ....................................................................................................................... 125

Table 118 Mode Select (15)........................................................................................................................... 126

Table 119 Mode Select (55)........................................................................................................................... 127

Table 120 Mode Sense (1A) .......................................................................................................................... 128

Table 121 Page Code Usage ......................................................................................................................... 129

Table 122 Mode parameter header (6) ........................................................................................................ 130

Table 123 Mode parameter header (10) ...................................................................................................... 130

Table 124 Short LBA Mode Parameter Block Descriptor .......................................................................... 131

Table 125 Long LBA Mode Parameter Block Descriptor ........................................................................... 131

Table 126 Mode Parameter Page Format ................................................................................................... 132

Table 127 Mode Parameter Page Format ................................................................................................... 132

Table 128 Vendor Unique Parameters - Page 00........................................................................................ 133

Table 129 Mode Page 01 (Vendor Unique Parameters) ............................................................................. 135

Table 130 Mode Page 02 (Disconnect/Reconnect Parameters) .................................................................. 139

Table 131 Mode Page 03 (Format Device Parameters) .............................................................................. 140

Table 132 Mode Page 04 (Rigid Disk Drive Geometry Parameters) ......................................................... 142

Table 133 Mode Page 07 (Verify Error Recovery Parameters) .................................................................. 143

Table 134 Page 08 (Caching Parameters) ................................................................................................... 144

Table 135 Page 0A (Control Mode Page Parameters) ................................................................................ 146

Table 136 Control Extension Subpage ........................................................................................................ 148

Table 137 Application Tag mode page: ........................................................................................................ 149

Table 138 Application Tag descriptor format ............................................................................................. 149

Table 139 Page 0C (Notch Parameters) ...................................................................................................... 150

Table 140 Page 18h (Protocol-Specific Logical Unit mode page) .............................................................. 151

Table 141 Short (Port Control Parameters) Short Format ........................................................................ 152

Table 142 Long Format of Port Control Page ............................................................................................. 153

Table 143 PHY Control and Discover (Subpage 1) ..................................................................................... 154

Table 144 SAS PHY Mode Descriptor ......................................................................................................... 155

Table 145 Shared Port Control (Subpage 2) ............................................................................................... 157

Table 146 Subpage 3 ..................................................................................................................................... 157

Table 147 PHY Mode Descriptor (0 and 1) ................................................................................................. 158

Table 148 Page 1A (Power Control) ............................................................................................................. 158

Table 149 PM_BG_PRECEDENCE field .................................................................................................... 160

Table 150 Page 1C (Informational Exceptions Control) ............................................................................ 161

Table 151 Background Control (Subpage 01h) ........................................................................................... 163

Table 152 Mode Sense (5A) .......................................................................................................................... 164

Table 153 Persistent Reserve In (5E) .......................................................................................................... 165

Table 154 PERSISTENT RESERVE IN, Service Action Codes ................................................................ 165

Table 155 PERSISTENT RESERVE IN, parameter data for Read Keys ................................................. 166

Table 156 PERSISTENT RESERVE IN, parameter data for Read Reservations ................................... 167

Table 157 PERSISTENT RESERVE IN, Read Reservation Descriptor ................................................... 167

Table 158 PERSISTENT RESERVE OUT (5F) .......................................................................................... 168

Table 159 PERSISTENT RESERVE OUT, Service Action Code ............................................................... 168

HGST Hard Disk Drive Specification

12

Table 160 PERSISTENT RESERVE OUT, Type Code .............................................................................. 169

Table 161 Parameter List ............................................................................................................................ 170

Table 162 PERSISTENT RESERVE OUT, Service Action, Parameters .................................................. 171

Table 163 APTPL and information held by a drive.................................................................................... 171

Table 164 PRE-FETCH (34) ......................................................................................................................... 172

Table 165 PRE-FETCH (90) ......................................................................................................................... 173

Table 166 READ (6) - (08) ............................................................................................................................ 174

Table 167 READ (10) - (28) .......................................................................................................................... 175

Table 168 READ (12) - (A8) .......................................................................................................................... 177

Table 169 READ (16) - (88) .......................................................................................................................... 178

Table 170 READ (32) - (7F/09) ..................................................................................................................... 179

Table 171 READ BUFFER (3C)................................................................................................................... 180

Table 172 Read Buffer Header .................................................................................................................... 180

Table 173 Read Buffer Description ............................................................................................................. 181

Table 174 Echo Buffer Descriptor ............................................................................................................... 182

Table 175 Error History Buffer ID Field .................................................................................................... 182

Table 176 Error History Directory .............................................................................................................. 183

Table 177 Error History Directory Entry ................................................................................................... 183

Table 178 READ CAPACITY (10) - (25) ...................................................................................................... 184

Table 179 Format of READ CAPACITY command reply ........................................................................... 184

Table 180 Read Capacity (16) (9E/10) ......................................................................................................... 185

Table 181 Returned Data Format ............................................................................................................... 185

Table 182 Protection Type (P_TYPE) field ................................................................................................. 185

Table 183 Logical Blocks per Physical Block Exponent field .................................................................... 185

Table 184 READ DEFECT DATA (37) ........................................................................................................ 186

Table 185 Defect List Format ...................................................................................................................... 186

Table 186 Defect List Header ...................................................................................................................... 187

Table 187 Defect List Descriptor ................................................................................................................. 187

Table 188 Defect Descriptors of Bytes from Index Format ....................................................................... 187

Table 189 Defect Descriptors of Physical Sector Format........................................................................... 187

Table 190 READ DEFECT DATA (B7) ........................................................................................................ 189

Table 191 Unit Defect List Header ............................................................................................................. 189

Table 192 Defect List Descriptor ................................................................................................................. 189

Table 193 Defect Descriptors of Bytes from Index Format ....................................................................... 190

Table 194 Defect Descriptors of Physical Sector Format........................................................................... 190

Table 195 READ LONG (3E) ....................................................................................................................... 191

Table 196 READ LONG (9E) ....................................................................................................................... 192

Table 197 REASSIGN BLOCKS (07) .......................................................................................................... 193

Table 198 Format of Reassign Blocks Parameter List data ...................................................................... 193

Table 199 RECEIVE DIAGNOSTIC RESULTS (1C) ................................................................................. 194

Table 200 Receive Diagnostic Results page 0 ............................................................................................. 194

Table 201 Receive Diagnostic Results page 40 ........................................................................................... 195

Table 202 Translated address ...................................................................................................................... 195

Table 203 RELEASE (17) ............................................................................................................................. 196

Table 204 RELEASE (57) ............................................................................................................................. 197

Table 205 REPORT DEVICE IDENTIFIER (A3/05) ................................................................................. 198

Table 206 Report Device Identifier parameter list .................................................................................... 198

Table 207 REPORT LUNS (A0) ................................................................................................................... 199

Table 208 LUN Reporting parameter list format....................................................................................... 199

Table 209 REPORT SUPPORTED OPERATION CODES (A3/0C) .......................................................... 200

Table 210 Reporting Options ....................................................................................................................... 201

Table 211 All_command parameter data format ........................................................................................ 202

Table 212 Command Descriptor format ...................................................................................................... 202

Table 213 One_command parameter data format...................................................................................... 203

HGST Hard Disk Drive Specification

13

Table 214 One_command parameter support field .................................................................................... 203

Table 215 Command timeouts descriptor format ....................................................................................... 204

Table 216 Command timeouts descriptor Command Specific Field usage .............................................. 204

Table 217 Report Supported Task Management Functions (A3/0D) ........................................................ 205

Table 218 Report Supported Task Management Functions - returned parameter data ......................... 205

Table 219 REPORT TIMESTAMP (A3/0F) ................................................................................................. 207

Table 220 REPORT TIMESTAMP return parameter data ....................................................................... 207

Table 221 Timestamp Origin value ............................................................................................................. 208

Table 222 REQUEST SENSE (03) .............................................................................................................. 209

Table 223 Sense Data Format and Length ................................................................................................. 209

Table 224 RESERVE (16) ............................................................................................................................. 210

Table 225 RESERVE (56) .............................................................................................................................. 211

Table 226 REZERO UNIT (01) .................................................................................................................... 212

Table 227 SANITIZE (48) ............................................................................................................................ 213

Table 228 SANITIZE Service Action Codes ................................................................................................ 214

Table 229 Parameter List Format for Overwrite Service Action .............................................................. 214

Table 230 SECURITY PROTOCOL IN (A2) ............................................................................................... 215

Table 231 SECURITY PROTOCOL field in SECURITY PROTOCOL IN command .............................. 215

Table 232 SECURITY PROTOCOL OUT (B5) ........................................................................................... 216

Table 233 SECURITY PROTOCOL field in SECURITY PROTOCOL OUT command .......................... 216

Table 234 SEND DIAGNOSTIC (1D) .......................................................................................................... 217

Table 235 SEND DIAGNOSTIC Function Code (1D) ................................................................................ 217

Table 236 Diagnostic page 0 ........................................................................................................................ 218

Table 237 Diagnostic page 3F ...................................................................................................................... 218

Table 238 Phy Test Function ....................................................................................................................... 218

Table 239 Phy Test Pattern ......................................................................................................................... 219

Table 240 Phy Test Pattern SSC Code ........................................................................................................ 219

Table 241 Phy Test Pattern Dwords Control .............................................................................................. 219

Table 242 Diagnostic Page 40 ...................................................................................................................... 220

Table 243 Address to translate .................................................................................................................... 220

Table 244 SET DEVICE IDENTIFIER (A4/06) .......................................................................................... 221

Table 245 SET DEVICE IDENTIFIER, Parameter List ........................................................................... 221

Table 246 SET TIMESTAMP (A4/0F) ......................................................................................................... 222

Table 247 SET TIMESTAMP parameter list .............................................................................................. 222

Table 248 START STOP UNIT (1B) ............................................................................................................ 223

Table 249 Power Conditions ........................................................................................................................ 223

Table 250 SYNCHRONIZE CACHE (10) - (35) .......................................................................................... 225

Table 251 Synchronize Cache (16) - (91) ..................................................................................................... 226

Table 252 TEST UNIT READY (00) ............................................................................................................ 227

Table 253 VERIFY (10) - (2F) ...................................................................................................................... 228

Table 254 Byte Check ................................................................................................................................... 228

Table 255 VERIFY (12) - (AF) ..................................................................................................................... 230

Table 256 VERIFY (16) - (8F) ...................................................................................................................... 231

Table 257 VERIFY (32) - 7F/0A) .................................................................................................................. 232

Table 258 WRITE (6) - (0A) .......................................................................................................................... 233

Table 259 WRITE (10) - (2A) ........................................................................................................................ 234

Table 260 WRITE (12) - (AA) ....................................................................................................................... 236

Table 261 WRITE (16) - (8A) ........................................................................................................................ 237

Table 262 WRITE (32) - (7F/0B) .................................................................................................................. 238

Table 263 WRITE AND VERIFY (10) - (2E) ............................................................................................... 239

Table 264 Byte Check ................................................................................................................................... 239

Table 265 WRITE and VERIFY (12) - (AE) ................................................................................................ 240

Table 266 WRITE and VERIFY (16) - (8E) ................................................................................................. 241

Table 267 WRITE and VERIFY (32) - (7F/0C) ........................................................................................... 242

HGST Hard Disk Drive Specification

14

Table 268 WRITE BUFFER (3B)................................................................................................................. 243

Table 269 Write Buffer Header .................................................................................................................... 243

Table 270 Mode Specific Field ..................................................................................................................... 246

Table 271 WRITE LONG (3F) ..................................................................................................................... 247

Table 272 WRITE LONG (9F) ..................................................................................................................... 248

Table 273 WRITE SAME (41) ...................................................................................................................... 249

Table 274 WRITE SAME (16) - (93) ............................................................................................................ 250

Table 275 WRITE SAME (32) - (7F/0D) ...................................................................................................... 251

Table 276 SCSI Status Byte. Format of the SCSI STATUS byte. ............................................................. 252

Table 277 Spindle Motor Degraded Mode - Disable Auto Start ................................................................ 257

Table 278 Spindle Motor Degraded Mode - Auto Start Delay/Spinning Up............................................. 258

Table 279 Spindle Motor Degraded Mode - Spindle Start Failure ........................................................... 258

Table 280 Spindle Motor Degraded Mode - Spindle Stopped by Command ............................................. 259

Table 281 Self Configuration Failure Degraded Mode .............................................................................. 259

Table 282 Format Command Failure Degraded Mode .............................................................................. 260

Table 283 Sense data combinations with auto/recommend rewrite/reallocate ........................................ 263

Table 284 Short and Extended Self-Test Description ................................................................................ 268

Table 285 Log Only Errors ........................................................................................................................... 272

Table 286 Rebuild Assist input diagnostic page ......................................................................................... 279

Table 287 Rebuild Assist output diagnostic page ....................................................................................... 280

Table 288 Persistent Reserve In (5E) .......................................................................................................... 283

Table 289 HGST Default Values for ‘Admin SP’ C_PIN & ‘Locking SP’ C_PIN ...................................... 285

Table 290 HGST Implementation of K_AES_256 Table ............................................................................ 285

Table 291 HGST Implementation of ‘Locking SP’ Access Control Table .................................................. 286

Table 292 HGST Implementation of ‘Locking Info’ Table .......................................................................... 286

Table 293 HGST Implementation of ‘Locking SP’ Locking Table ............................................................. 286

Table 294 PSID Authority Added to ‘Admin SP’ Authority Table ............................................................. 287

Table 295 PSID Addition to ‘Admin SP’ C_PIN table ................................................................................ 287

Table 296 Additions to ‘Admin SP’ Access Control Table .......................................................................... 288

Table 297 Ports Functionality ..................................................................................................................... 288

Table 298 Ports Table ................................................................................................................................... 288

Table 299 Modified ‘Admin SP’ ACE Table ................................................................................................. 289

Table 300 Modified ‘Admin SP’ Access Control Table (part 1 of 2) ........................................................... 289

Table 301 Modified ‘Admin SP’ Access Control Table (part 2 of 2) ........................................................... 290

Table 302 T10 SCSI Commands Behavior Table (part 1 of 2) ................................................................... 292

Table 303 T10 SCSI Commands Behavior Table (part 2 of 2) ................................................................... 293

Table 304 TCG Enterprise SSC Commands Behavior -1 .......................................................................... 294

Table 305 TCG Enterprise SSC Commands Behavior -2 .......................................................................... 294

Table 306 TCG Enterprise SSC Commands Behavior -3 .......................................................................... 294

Table 307 TCG Enterprise SSC Commands Behavior -4 .......................................................................... 295

Table 308 TCG Enterprise SSC Commands Behavior -5 .......................................................................... 295

Table 309 SECURITY PROTOCOL SPECIFIC Field for SECURITY PROTOCOL IN Protocol 00h .... 297

Table 310 Supported Security Protocols SECURITY PROTOCOL IN Parameter Data ............................... 298

Table 311 Certificate Data SECURITY PROTOCOL IN Parameter Data ..................................................... 298

Table 312 Security Compliance Information SECURITY PROTOCOL IN Parameter Data ................. 299

Table 313 Compliance Descriptor Format .................................................................................................. 300

Table 314 COMPLIANCE DESCRIPTOR TYPE Field ............................................................................. 300

Table 315 FIPS 140 Compliance Descriptor ............................................................................................... 301

Table 316 RELATED STANDARD Field .................................................................................................... 301

Table 317 Sense data response codes .......................................................................................................... 303

Table 318 Fixed Format Sense Data ........................................................................................................... 304

Table 319 Incorrect Length Indicator ......................................................................................................... 305

Table 320 Information Bytes (Byte 3 through 6) ....................................................................................... 306

Table 321 Sense Code/Qualifier ................................................................................................................... 307

HGST Hard Disk Drive Specification

15

Table 322 Field Pointer Bytes ..................................................................................................................... 330

Table 323 Actual Retry Count ..................................................................................................................... 331

Table 324 Recovery Type .............................................................................................................................. 331

Table 325 Progress Indication ..................................................................................................................... 332

Table 326 Log Only Errors ........................................................................................................................... 332

Table 327 Descriptor Format Sense Data ................................................................................................... 333

Table 328 Sense Data Descriptor Format ................................................................................................... 333

Table 329 Supported Descriptor Types ....................................................................................................... 333

Table 330 Sense Data Descriptor List ......................................................................................................... 334

Table 331 Information Sense Data Descriptor Format ............................................................................. 335

Table 332 Command-specific Sense Data Descriptor Format ................................................................... 336

Table 333 Information Sense Data Descriptor Format ............................................................................. 336

Table 334 Field Replaceable Unit Sense Data Descriptor Format ........................................................... 337

Table 335 Block Command Sense Data Descriptor Format ...................................................................... 337

Table 336 Vendor Unique Unit Error Code Sense Data Descriptor ......................................................... 338

Table 337 Vendor Unique Physical Error Record Sense Data Descriptor ................................................ 338

Table 338 Unit Error Codes ......................................................................................................................... 339

HGST Hard Disk Drive Specification

16

List of figures

Figure 1 PList physical format ...................................................................................................................... 29

Figure 2 Connector location ........................................................................................................................... 30

Figure 3 SAS Connector ................................................................................................................................. 31

Figure 4 Limits of temperature and altitude ............................................................................................... 33

Figure 5 Limits of temperature and humidity ............................................................................................. 34

Figure 6 Top and side views and mechanical dimensions ........................................................................... 39

Figure 7 Bottom and side views with mounting hole locations .................................................................. 40

Figure 8 Connector locations ......................................................................................................................... 41

Figure 9 Link Reset Sequence ....................................................................................................................... 53

Figure 10 SSP Information Unit Sequences ................................................................................................. 67

HGST Hard Disk Drive Specification

17

General

Capacity

Type

Interface

Format

Model#

Description

8TB

US7SSJ800

Serial Attached

SCSI

512e

HUH728080AL5200

Instant Secure Erase

HUH728080AL5201

TCG(Trusted Computing Group)

HUH728080AL5204

Secure Erase (Overwrite only)

HUH728080AL5205

TCG w/ FIPS

4Kn
HUH728080AL4200

Instant Secure Erase

HUH728080AL4201

TCG(Trusted Computing Group)

HUH728080AL4204

Secure Erase (Overwrite only)

HUH728080AL4205

TCG w/ FIPS

6TB

US7SSJ600

512e

HUH728060AL5200

Instant Secure Erase

HUH728060AL5201

TCG(Trusted Computing Group)

HUH728060AL5204

Secure Erase (Overwrite only)

HUH728060AL5205

TCG w/ FIPS

4Kn
HUH728060AL4200

Instant Secure Erase

HUH728060AL4201

TCG(Trusted Computing Group)

HUH728060AL4204

Secure Erase (Overwrite only)

HUH728060AL4205

TCG w/ FIPS

Introduction

This document describes the specifications of the Ultrastar He8 an HGST 3.5-inch 7200-rpm Serial Attached SCSI
interface hard disk drive with the following model numbers:

Table 1 Type and Model#

ESD Electrostatic Discharge
Kbpi 1,000 bits per inch
Ktpi 1,000 tracks per inch
Gbps 1,000,000,000 bits per second
Mbps 1,000,000 bits per second
MB/s 1,000,000 bytes per second
TB 1,000,000,000,000 bytes (for Drive Capacity)
GB 1,000,000,000 bytes (for Drive Capacity)
MB 1,048,576 bytes (for Memory Size)
KB 1,024 bytes (for Memory Size)
S.M.A.R.T. Self-Monitoring Analysis and Reporting Technology

Glossary

HGST Hard Disk Drive Specification

18

General caution

The drive can be damaged by shock or ESD (Electrostatic Discharge). Any damage sustained by the drive after
removal from the shipping package and opening the ESD protective bag are the responsibility of the user.

References

 SAS Compliance : “Serial Attached Serial SCSI-3 (SAS-3)”
 SAS Protocol

 This drive supports Serial SCSI Protocol (SSP)
 STP (Tunneled SATA) and SMP (Management protocol) protocols are NOT supported

HGST Hard Disk Drive Specification

19

General features

 Data capacities of 8TB/6TB
 Spindle speeds of 7200 RPM
 Fluid Dynamic Bearing motor
 Dual Stage Actuator
 Closed-loop actuator servo
 Automatic Actuator lock
 Write Cache
 Advanced Power Management (APM)
 S.M.A.R.T. (Self Monitoring and Analysis Reporting Technology)
 Adaptive zone formatting
 RVS(Rotational Vibration Safeguard)
 Sector Buffer size of 128MB
 Seek time of 8.5 ms in read operation (without Command Overhead)
 Segmented buffer implementation
 Automatic Error Recovery procedures for read and write commands
 Automatic defect reallocation
 Media cache technology
 SAS Interface 12/6/3/1.5Gbps
 Supports dual-ported operations
 Supports full duplex operations
 Variable sector size (512, 520, 528) bytes/sector and (4096,4112,4160,4224) bytes/sector
 Back to back write
 Self diagnostics at power on
 64 bit addressing feature
 SAS-3 compliant
 ANSI T10 Protection Information (End-to-End)
 Support TCG Enterprise_A SSC Encryption (specific model only)
 FIPS-2 Support

HGST Hard Disk Drive Specification

20

Part 1. Functional specification

HGST Hard Disk Drive Specification

21

Fixed disk subsystem description

Control Electronics

The drive is electronically controlled by a microprocessor, several logic modules, digital/analog modules, and
various drivers and receivers. The control electronics performs the following major functions:

 Controls and interprets all interface signals between the host controller and the drive.
 Controls read write accessing of the disk media, including defect management and error recovery.
 Controls starting, stopping, and monitoring of the spindle.
 Conducts a power-up sequence and calibrates the servo.
 Analyzes servo signals to provide closed loop control. These include position error signal and estimated

velocity.

 Monitors the actuator position and determines the target track for a seek operation.
 Controls the voice coil motor driver to align the actuator in a desired position.
 Constantly monitors error conditions of the servo and takes corresponding action if an error occurs.
 Monitors various timers such as head settle and servo failure.
 Performs self-checkout (diagnostics).

Head disk assembly

The head disk assembly (HDA) is assembled in a clean room environment and contains the disks and actuator
assembly. Helium is constantly circulated and filtered when the drive is operational. No venting of the HDA is
accomplished, as HDA is hermetically sealed.

The spindle is driven directly by an in-hub, brushless, sensorless DC drive motor. Dynamic braking is used to
quickly stop the spindle.

Actuator

The read/write heads are mounted in the actuator. The actuator is a swing-arm assembly driven by a voice coil
motor. A closed-loop positioning servo controls the movement of the actuator. An embedded servo pattern supplies
feedback to the positioning servo to keep the read/write heads centered over the desired track.

The actuator assembly is balanced to allow vertical or horizontal mounting without adjustment.
When the drive is powered off, the actuator automatically moves the head to the actuator ramp outside of the disk

where it parks.

HGST Hard Disk Drive Specification

22

Drive characteristics

Description

8TB model

Physical Layout

Label capacity

8TB

8TB

8TB

Bytes per Sector

4,096

4,160

4,224

Number of Heads

14

14

14

Number of disks

7 7 7

Logical Layout

1

Bytes per Sector

512

520

528

Number of Sectors

15,628,053,168

15,362,376,264

15,081,071,304

Total Logical Data Bytes

8,001,563,222,016

7,988,435,657,280

7,962,805,648,512

Description

6TB+ Model

Physical Layout

Label capacity

6TB

6TB

6TB

Bytes per Sector

4,096

4,160

4,224

Number of Heads

11

11

11

Number of disks

7 7 7

Logical Layout

1

Bytes per Sector

512

520

528

Number of Sectors

11,721,045,168

11,721,045,168

11,310,808,584

Total Logical Data Bytes

6,001,175,126,016

6,094,943,487,360

5,972,106,932,352

This section describes the characteristics of the drive.

Default logical drive parameters

The default of the logical drive parameters in Identify Device data is as shown below.

HGST Hard Disk Drive Specification

23

Description

8TB model

Physical Layout

Label capacity

8TB

8TB

8TB

8TB

Bytes per Sector

4,096

4,112

4,160

4,224

Number of Heads

14

14

14

14

Number of disks

7 7 7

7

Logical Layout

1

Bytes per Sector

4096

4112

4160

4224

Number of Sectors

1,953,506,646

1,945,692,616

1,920,297,033

1,885,133,913

Total Logical Data Bytes

8,001,563,222,016

8,000,688,036,992

7,988,435,657,280

7,962,805,648,512

Description

6TB+ Model

Physical Layout

Label capacity

6TB

6TB

6TB

6TB

Bytes per Sector

4,096

4,112

4,160

4,224

Number of Heads

11

11

11

11

Number of disks

7 7 7

7

Logical Layout

1

Bytes per Sector

4096

4112

4160

4224

Number of Sectors

1,465,130,646

1,459,270,120

1,465,130,646

1,413,851,073

Total Logical Data Bytes

6,001,175,126,016

6,000,518,733,440

6,094,943,487,360

5,972,106,932,352

Table 2 Formatted capacity

Notes:

1

Logical layout: Logical layout is an imaginary drive parameter (that is, the number of heads) which is used to
access the drive from the system interface. The Logical layout to Physical layout (that is, the actual Head and
Sectors) translation is done automatically in the drive. The default setting can be obtained by issuing an IDENTIFY
DEVICE command

HGST Hard Disk Drive Specification

24

Data sheet

Description

8TB

Model

6TB

Model

Max Data transfer rate (Mbps)

1,924

1,833

Interface transfer rate (MB/s)

1,200

1,200

Typ Sustained transfer rate (MB/s)

205

199

Data buffer size (MB)

128

128

Rotational speed (RPM)

7,200

7,200

Configurable number of buffer segment Number

2048 max

2048 max

Recording density- max (Kbpi)

1,745

1,666

Track density (Ktpi)

380

380

Areal density - max (Gbits/in2)

664

501

Description

8TB model

6TB model

Organization

HGST

HGST

Manufacturing Site

Thailand

China

Thailand

China

Product

Ultrastar He8-8

Ultrastar He8-6

Block Assignment

Thailand:23Bh

China:3B4h

Thailand:23Ch

China:3B5h

Table 3 Mechanical positioning performance (Sector format of 4k bytes/sector)

World Wide Name Assignment

Table 4 World Wide Name Assignment

HGST Hard Disk Drive Specification

25

Drive organization

Command type
(Drive is in quiescent state)

Typical time (ms)

Typical time for NCQ

command (ms)

Read (Cache not hit)

0.2

0.2

Read (Cache hit)

0.2

0.2

Write

0.5

0.5

Seek

0.2

not applicable

Drive Format

Upon shipment from HGST manufacturing the drive satisfies the sector continuity in the physical format by means
of the defect flagging strategy described in Section 5 on page 14 in order to provide the maximum performance to
users.

Cylinder allocation

Physical cylinder is calculated from the starting data track of 0. It is not relevant to logical CHS. Depending on the
capacity some of the inner zone cylinders are not allocated.

Data cylinder
This cylinder contains the user data which can be sent and retrieved via read/write commands and a spare area for
reassigned data.

Spare cylinder
The spare cylinder is used by HGST manufacturing and includes data sent from a defect location.

Performance characteristics

Drive performance is characterized by the following parameters:

 Command overhead
 Mechanical positioning

- Seek time

- Latency

 Data transfer speed
 Buffering operation (Look ahead/Write cache)

All the above parameters contribute to drive performance. There are other parameters that contribute to the
performance of the actual system. This specification defines the characteristics of the drive, not the characteristics
of the system throughput which depends on the system and the application.

Command overhead

Command overhead is defined as the time required

 from the time H->D Reg FIS w/ command bit is sent by host
 to the time

 PIO Set Up FIS is sent by device(PIO Read/Write)
 DATA FIS is sent by device(DMA Read)
 DMA Activate FIS is sent by device(DMA Write)
 DMA Set Up FIS is sent by device(NCQ Read/Write)
 Seek Start (Read cache not hit or Seek)

The table below gives average command overhead.

Table 5 Command overhead

HGST Hard Disk Drive Specification

26

Mechanical positioning

Command Type

Typical (ms)

Max (ms)

Read

8.5

10.0

Write

9.0

11.0

Function

Typical (ms)

Max (ms)

Read

0.25

0.35

Write

0.35

0.45

Rotational speed

Time for a revolution

(ms)

Average latency

(ms)

7200 RPM

8.3

4.16

Power on to ready

Typical (sec)

Maximum (sec)

20

30

Ready

The condition in which the drive is able to perform a media access command (such as read, write)
immediately

Power on

This includes the time required for the internal self diagnostics.

Average seek time (without command overhead,

including settling)

Table 6 Average seek time

The terms “Typical” and “Max” are used throughout this specification with the following meanings:

Typical. The average of the drive population tested at nominal environmental and voltage conditions.
Max. The maximum value measured on any one drive over the full range of the environmental and voltage

conditions. (See Section 6.2, “Environment” and Section 6.3, “DC Power Requirements”)

Single track seek time (without command overhead,

including settling)

Common to all models and all seek modes

Table 7 Single Track Seek Time

Average latency

Table 8 Latency Time

Drive ready time

Table 9 Drive ready time

HGST Hard Disk Drive Specification

27

Operating modes

From

To

RPM

Typical Transition

time (sec)

Max Transition

time (sec)

Standby Z

Idle A

0 -> 7200

15

30

Idle A

Standby Z

7200 -> 0

Immediately

Immediately

Idle B

Idle A

7,200

1

30

Idle A

Idle B

7,200

0.7

30

Idle C

Idle A

6300 -> 7200

4

30

Operating mode descriptions

Spin-up Start up time period from spindle stop or power down
Seek Seek operation mode
Write Write operation mode
Read Read operation mode
Idle_A Spindle motor is working normally. Servo system is sleeping or waking up. Commands can

be received and processed immediately

Idle_B Spindle rotation at 7200 RPM with heads unloaded
Idle_C/Standby_Y Spindle rotation at Low RPM with heads unloaded
Standby_Z Actuator is unloaded and spindle motor is stopped. Commands can be received

immediately

Note: Upon power down or spindle stop a head locking mechanism will secure the heads in the OD parking
position.

Mode transition times

Mode transition times are shown below.

Table 10 Mode transition times

HGST Hard Disk Drive Specification

28

Defect flagging strategy

N N+1 N+2 N+3

defect defect

skip

skip

Media defects are remapped to the next available sector during the Format Process in manufacturing. The mapping
from LBA to the physical locations is calculated by an internally maintained table.

Shipped format

 Data areas are optimally used.
 No extra sector is wasted as a spare throughout user data areas.
 All pushes generated by defects are absorbed by the spare tracks of the inner zone.

Figure 1 PList physical format

Defects are skipped without any constraint, such as track or cylinder boundary. The calculation from LBA to
physical is done automatically by internal table.

HGST Hard Disk Drive Specification

29

Specification

Electrical interface

Connector location

Refer to the following illustration to see the location of the connectors.

Figure 2 Connector location

Signal Connector

The drive uses the standard 29 pin Serial Attached SCSI (SAS) connector which conforms to the mechanical
requirements of SFF 8660. The connector is expected to be used in an environment which uses a common
connector structure for racking disk drives in a cabinet. The connector allows for plugging a drive directly into a
backplane by providing the necessary electrical connection. Mechanical stability and device retention must be
provided by a mechanism outside the drive.

HGST Hard Disk Drive Specification

30

29 pin Serial Attached SCSI (SAS) Connector Definition

Pin No.

Signal

Description

S1

GND

GND for SAS Primary Port

S2

RP+

SAS Primary Port Receive (Positive) signal

S3

RP-

SAS Primary Port Receive (Negative) signal

S4

GND

GND for SAS Primary Port

S5

TP-

SAS Primary Port Transmit (Negative) signal

S6

TP+

SAS Primary Port Transmit (Positive) signal

S7

GND

GND for SAS Primary Port

S8

GND

GND for SAS Secondary Port

S9

RS+

SAS Secondary Port Receive (Positive) signal

S10

RS-

SAS Secondary Port Receive (Negative) signal

S11

GND

GND for SAS Secondary Port

S12

TS-

SAS Secondary Port Transmit (Negative) signal

S13

TS+

SAS Secondary Port Transmit (Positive) signal

S14

GND

GND for SAS Secondary Port

P1

Vendor Spec

NOT USED (Pins P1-P3 tied internally)

P2

Vendor Spec

NOT USED (Pins P1-P3 tied internally)

P3

POWER DISABLE

POWER DISABLE

P4

GND

GROUND

P5

GND

GROUND

P6

GND

GROUND

P7

+5V-Charge

Pre-charge pin for +5V

P8

+5V

+5V power supply input

P9

+5V

+5V power supply input

P10

GND

GROUND

P11

READY LED

READY LED output

P12

GND

GROUND

P13

+12V=Charge

Pre-charge pin for +12V

P14

+12V

+12V power supply input

P15

+12V

+12V power supply input

Diagram of top and bottom of connector showing pinouts.

Figure 3 SAS Connector

Table 11 29-pin Connector Signal Definition

HGST Hard Disk Drive Specification

31

Voltage and Ground Signals

The 12V and 5V contacts provide all of the voltages required by the drive. The two voltages share a common
ground plane to which all of the ground contacts are connected.

Ready LED output

The drive provides an open-drain driver with 15mA of current sink capability to the Ready LED Output signal. The
cathode of the LED should be connected to this signal. The LED and the current-limiting resistor must be provided
by the enclosure

HGST Hard Disk Drive Specification

32

Environment

Operating conditions

Temperature
Relative humidity
Maximum wet bulb temperature
Maximum temperature gradient
Altitude

5 to 60°C
8 to 90% non-condensing

29.4°C non-condensing
20°C/Hour
–300 to 3,048 m

Non-Op conditions

Temperature
Relative humidity
Maximum wet bulb temperature

Maximum temperature gradient

Altitude

-40 to 70°C (Storage 0 to 70°C)
5 to 95% non-condensing
35°C non-condensing

30°C/Hour

–300 to 12,000 m (Inside dashed-dotted line of Figure 4)

-2000

-1000

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

11000

12000

13000

-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80

Altitude (m)

Temperature (degC)

Altitude specification

Non-Operating

-40degC/12000m 40degC/12000m

70degC/3048m

5degC/3048m

60degC/3048m

60degC/-300m

5degC/-300m

-40degC/-300m

70degC/-300m

Operating

Temperature and humidity

Table 12 Temperature and humidity

Notes:

1. The system is responsible for providing sufficient ventilation to maintain a surface temperature below 65°C at the

center of the top cover of the drive.

2. Non condensing conditions should be maintained at any time.

3. Maximum storage period within shipping package is one year.

Figure 4 Limits of temperature and altitude

HGST Hard Disk Drive Specification

33

Figure 5 Limits of temperature and humidity

Corrosion test

The drive shows no sign of corrosion inside and outside of the hard disk assembly and is functional after being
subjected to seven days at 50°C with 90% relative humidity.

Atmospheric condition

Environments that contain elevated levels of corrosives (e.g. hydrogen sulfide, sulfur oxides, or hydrochloric acid)
should be avoided. Care must be taken to avoid using any compound/material in a way that creates an elevated
level of corrosive materials in the atmosphere surrounding the disk drive. Care must also be taken to avoid use of
any organometallic (e.g. organosilicon or organotin) compound/material in a way that creates elevated vapor levels
of these compounds/materials in the atmosphere surrounding the disk drive.

HGST Hard Disk Drive Specification

34

DC power requirements

Input voltage

During run and

spin up

Absolute max

spike voltage

Supply rise time

+5 Volts Supply

5V ± 5%

–0.3 to 5.5V

0 to 200ms

+12 Volts Supply

12V ± 5%

–0.3 to 15.0V

0 to 400ms

The following voltage specification applies at the drive power connector. Connections to the drive should be made
in a safety extra low voltage (SELV) circuit. There is no power on or power off sequencing requirement.
Adequate secondary over-current protection is the responsibility of the system.

Input voltage

Table 13 Input voltage

Caution : To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifications.

HGST Hard Disk Drive Specification

35

Power supply current (typical

1

)

Table 14 SAS power consumption

HGST Hard Disk Drive Specification

36

Power supply generated ripple at drive power connector

Maximum (mV pp)

MHz

+5V DC

200

0-10

+12V DC

250

0-10

Power Consumption Efficiency at Idle

W/TB

0.71 (8TB)

W/GB

0.00071 (8TB)

Table 15 Power supply generated ripple at drive power connector

During drive start up and seeking 12-volt ripple is generated by the drive (referred to as dynamic loading). If the
power of several drives is daisy chained together, the power supply ripple plus the dynamic loading of the other
drives must remain within the above regulation tolerance. A common supply with separate power leads to each
drive is a more desirable method of power distribution.

To prevent external electrical noise from interfering with the performance of the drive, the drive must be held by four
screws in a user system frame which has no electrical level difference at the four screws position and has less than
±300 millivolts peak to peak level difference to the ground of the drive power connector.

Power Consumption Efficiency

Table 16 Power consumption efficiency

HGST Hard Disk Drive Specification

37

Reliability

Data integrity

No more than one sector is lost at Power loss condition during the write operation when the write cache option is
disabled. If the write cache option is active, the data in write cache will be lost. To prevent the loss of customer
data, it is recommended that the last write access before power off be issued after setting the write cache off.

Cable noise interference

To avoid any degradation of performance throughput or error rate when the interface cable is routed on top or
comes in contact with the HDA assembly, the drive must be grounded electrically to the system frame by four
screws. The common mode noise or voltage level difference between the system frame and power cable ground or
AT interface cable ground should be in the allowable level specified in the power requirement section.

Load/Unload

The product supports a minimum of 600,000 normal load/unloads in a 40° C environment.
Load/unload is invoked by transition of the HDD's power mode. (Chapter 4.5.4 "Operating modes”)

Idle <-> unload idle
Idle <-> Low rpm idle

Start/stop cycles

The drive withstands a minimum of 50,000 start/stop cycles in a 40° C environment and a minimum of 10,000
start/stop cycles in extreme temperature or humidity within the operating range.

Preventive maintenance

None

Data reliability

Probability of not recovering data is 1 in 1015 bits read.
LDPC on the fly/ offline data correction

 600 bit LDPC
 This implementation recovers maximum 330 bits single burst error by on the fly correction and maximum

450 bits single burst error by offline correction

Required Power-Off Sequence

The required BIOS sequence for removing power from the drive is as follows:

Step 1: Issue one of the following commands.

STOP UNIT

Note: Do not use the Flush Cache command for the power off sequence because this command does not invoke
Unload

Step 2: Wait until the Command Complete status is returned. In a typical case 350 ms are required for the

command to finish completion; however, the BIOS time out value needs to be 30 seconds considering
error recovery time.

Step 3: Terminate power to HDD.

HGST Hard Disk Drive Specification

38

Mechanical specifications

Physical dimensions

Figure 6 Top and side views and mechanical dimensions

All dimensions are in millimeters.

HGST Hard Disk Drive Specification

39

Figure 7 Bottom and side views with mounting hole locations

Height (mm)

Width (mm)

Length (mm)

Weight (grams)

26.1 MAX

101.6 ± 0.25

147 MAX

650 MAX

All dimensions in the above figure are in millimeters.
The following table shows the physical dimensions of the drive.

Table 17 Physical Dimensions

HGST Hard Disk Drive Specification

40

Connector locations

SAS

Figure 8 Connector locations

Drive mounting

The drive will operate in all axes (6 directions). Performance and error rate will stay within specification limits if the
drive is operated in the other orientations from which it was formatted.

For reliable operation, the drive must be mounted in the system securely enough to prevent excessive motion or
vibration of the drive during seek operation or spindle rotation, using appropriate screws or equivalent mounting
hardware.

The recommended mounting screw torque is 0.6 - 1.0 Nm (6-10 Kgf.cm).
The recommended mounting screw depth is 3.8 mm maximum for bottom and 6.1 mm maximum for horizontal

mounting.
Drive level vibration test and shock test are to be conducted with the drive mounted to the table using the bottom

four screws.

Heads unload and actuator lock

Heads are moved out from disks (unload) to protect the disk data during shipping, moving, or storage. Upon
power down, the heads are automatically unloaded from disk area and the locking mechanism of the head actuator
will secure the heads in unload position.

HGST Hard Disk Drive Specification

41

Vibration and shock

Frequency

5 Hz

17 Hz

45 Hz

48 Hz

62 Hz

65 Hz

150 Hz

200 Hz

500 Hz

RMS

(m/sec2)

[(m/sec2)2/Hz]

1.9 x

10E–3

1.1 x

10E–1

1.1 x

10E–1

7.7 x

10E–1

7.7 x

10E–1

9.6 x

10E–2

9.6 x

10E–2

4.8 x

10E–2

4.8 x

10E-2

6.57

Frequency

20 Hz

100 Hz

200 Hz

800 Hz

1000 Hz

1500 Hz

1700 Hz

2000 Hz

RMS

(Rad/s2)

[(Rad/s2) 2/Hz]

1.90E

-02

1.90E

-02

1.87E

-01

1.87E

-01

5.33E

-02

7.70E

-03

4.00E

-03

4.00E

-03

12.5

All vibration and shock measurements recorded in this section are made with a drive that has no mounting
attachments for the systems. The input power for the measurements is applied to the normal drive mounting points.

Operating vibration

Random vibration (Linear)

The test is 30 minutes of random vibration using the power spectral density (PSD) levels shown below in each of
three mutually perpendicular axes. The disk drive will operate without non-recoverable errors when subjected to the
below random vibration levels.

Table 18 Random vibration PSD profile break points (operating)

The overall RMS (root mean square) level is 6.57 m/sec2 (0.67 G).

Swept sine vibration (Linear)

The drive will meet the criteria shown below while operating in the specified conditions:

 No errors occur with 4.9 m/sec2 (0.5 G) 0 to peak, 5 to 300 to 5 Hz sine wave, 0.5 oct/min sweep rate with 3-

minute dwells at two major resonances

 No data loss occurs with 9.8 m/sec2 (1 G) 0 to peak, 5 to 300 to 5 Hz sine wave, 0.5 oct/min sweep rate with

3-minute dwells at two major resonances

Random vibration (Rotational)

The drive will meet the criteria shown below while operating in the specified conditions:

 Less than 20% Performance degradation
 The overall RMS (Root Mean Square) level of vibration is 12.5Rad/sec^2. PSD profile is shown below.

Table 19 Random vibration (Rotational) PSD profile break points

HGST Hard Disk Drive Specification

42

Nonoperating vibration

Frequency

2 Hz

4 Hz

8 Hz

40 Hz

55 Hz

70 Hz

200 Hz

[(m/sec2)2/Hz]

0.096

2.89

2.89

0.289

0.962

0.962

0.096

Acceleration level (m/sec2)

Duration (ms)

2940(300G)

1

1470(150G)

11

The drive does not sustain permanent damage or loss of previously recorded data after being subjected to the
environment described below

Random vibration

The test consists of a random vibration applied for each of three mutually perpendicular axes with the time duration
of 10 minutes per axis. The PSD levels for the test simulate the shipping and relocation environment shown below.
The overall RMS (Root Mean Square) level of vibration is 10.2 m/sec2 (1.04 G).

Table 20 Random vibration PSD profile break points (nonoperating)

Swept sine vibration

 19.6 m/sec2 (2 G) (Zero to peak), 5 to 500 to 5 Hz sine wave
 0.5 oct/min sweep rate
 3 minutes dwell at two major resonances

Operating shock

The drive meets the following criteria while operating in the conditions described below. The shock test consists of
10 shock inputs in each axis and direction for total of 60. There must be a delay between shock pulses long enough
to allow the drive to complete all necessary error recovery procedures.

 No error occurs with a 98.1 m/sec2 (10 G) half-sine shock pulse of 11 ms duration.
 No data loss occurs with a 294 m/sec2 (30 G) half-sine shock pulse of 4 ms duration.
 No data loss occurs with a 686 m/sec2 (70 G) half-sine shock pulse of 2 ms duration.

Nonoperating shock

The drive will operate without non-recoverable errors after being subjected to shock pulses with the following
characteristics.

Trapezoidal shock wave

 Approximate square (trapezoidal) pulse shape
 Approximate rise and fall time of pulse is1 ms
 Average acceleration level is 490 m/sec2 (50 G). (Average response curve value during the time following the

1 ms rise time and before the 1 ms fall with a time "duration of 11 ms")

 Minimum velocity change is 4.23 m/sec

Sinusoidal shock wave

The shape is approximately half-sine pulse. The figure below shows the maximum acceleration level and duration.

Table 21 Sinusoidal shock wave

HGST Hard Disk Drive Specification

43

Nonoperating Rotational shock

Duration

Rad/sec2

1 ms

30,000

2 ms

20,000

All shock inputs shall be applied around the actuator pivot axis.

Table 22 Rotational Shock

HGST Hard Disk Drive Specification

44

Acoustics

Mode

7200rpm (Typical / Max)

Idle

2.0 / 2.5

Operating

3.6 / 4.0

Idle mode.

The drive is powered on, disks spinning, track following, unit ready to receive and respond to
interface commands.

Operating mode.

Continuous random cylinder selection and seek operation of the actuator with a dwell time at
each cylinder. The seek rate for the drive is to be calculated as shown below:

The upper limit criteria of the octave sound power levels are given in Bels relative to one picowatt and are shown in
the following table. The sound power emission levels are measured in accordance with ISO 7779.

Table 23 Sound power levels

Mode definition:

 Dwell time = 0.5 x 60/RPM
 Seek rate = 0.4 / (Average seek time + Dwell time)

Identification labels

The following labels are affixed to every drive shipped from the drive manufacturing location in accordance with the
appropriate hard disk drive assembly drawing:

 A label containing the HGST logo, the HGST part number, and the statement “Made by HGST Japan, Ltd.” or

HGST Japan approved equivalent

 A label containing the drive model number, the manufacturing date code, the formatted capacity, the place of

manufacture, UL/CSA/TUV/CE/C-Tick mark logos and WEEE/China RoHS logos

 A bar code label containing the drive serial number
 A label containing the jumper pin description
 A user designed label per agreement

The above labels may be integrated with other labels.

HGST Hard Disk Drive Specification

45

Safety

UL and CSA standard conformity

The product is qualified per UL60950-1：Second Edition and CAN/CSA-C22.2 No.60950-1-07 Second Edition, for
use in Information Technology Equipment including Electric Business Equipment.

The UL recognition or the CSA certification is maintained for the product life.
The UL and C-UL recognition mark or the CSA monogram for CSA certification appear on the drive.

German Safety Mark

The product is approved by TUV on Test requirement: EN60950-1：2006+A11 but the GS mark is not applicable to
internal devices such as this product.

Flammability

The printed circuit boards used in this product are made of material with the UL recognized flammability rating of V­1 or better. The flammability rating is marked or etched on the board. All other parts not considered electrical
components are made of material with the UL recognized flammability rating of V-2 minimum basically.

Safe handling

The product is conditioned for safe handling in regards to sharp edges and corners.

Substance restriction requirements

The product complies with the Directive 2002/95/EC of the European Parliament on the restrictions of the use of the
certain hazardous substances in electrical and electronic equipment (RoHS) and with Halogen free requirements
based on the electronics industry standard, IEC 61249-2-21 (http://www.iec.ch/).
FIPS models do not comply with IEC 61249-2-21.

Secondary circuit protection

Spindle/VCM driver module includes 12 V over current protection circuit.

HGST Hard Disk Drive Specification

46

Electromagnetic compatibility

When installed in a suitable enclosure and exercised with a random accessing routine at maximum data rate, the
drive meets the following worldwide EMC requirements:

 United States Federal Communications Commission (FCC) Rules and Regulations (Class B), Part 15. (A 6

dB buffer shall be maintained on the emission requirements).

 European Economic Community (EEC) directive number 76/889 related to the control of radio frequency

interference and the Verband Deutscher Elektrotechniker (VDE) requirements of Germany (GOP).Spectrum
Management Agency (SMA) EMC requirements of Australia. The SMA has approved C-Tick Marking for
HGST Japan.

CE Mark

The product is declared to be in conformity with requirements of the following EC directives under the sole
responsibility of HGST Japan, Ltd:

Council Directive 2004/108/EC on the approximation of laws of the Member States relating to electromagnetic
compatibility.

C-Tick Mark

The product complies with the following Australian EMC standard:
Limits and methods of measurement of radio disturbance characteristics of information technology, AS/NZS 3548 :

1995 Class B.

BSMI Mark

The product complies with the Taiwan EMC standard “Limits and methods of measurement of radio disturbance

characteristics of information technology equipment, CNS 13438 Class B.”

KC Mark

The product complies with the Korea EMC standard. The regulation for certification of information and

communication equipment is based on “Telecommunications Basic Act” and “Radio Waves Act” Korea EMC

requirement are based technically on CISPR22 measurement standards and limits. KC standards are likewise
based on IEC standards.

HGST Hard Disk Drive Specification

47

Part 2. Interface specification

HGST Hard Disk Drive Specification

48

SAS Attachment

This section defines some basic terminology and describes the behavior of the drive when attached to a Serial
Attached SCSI (i.e. SAS) domain.

General

This section introduces some of the terminology that is used in describing Serial Attached SCSI (i.e. SAS).
SAS is logically a bi-directional, point to point serial data channel that leverages the SCSI protocol set. Nodes are
physically connected via a port.
Ports may be connected point-to-point via SAS expanders, to form a complex switching network, referred to as a
SAS domain.
SAS is defined in terms of a hierarchy of functions or 'protocol layers'. This discussion will focus in on the aspects of
SAS that are relevant to this product.

• SCSI Application Layer - Clause 10

• SSP Transport Layer (Serial SCSI Protocol) - Clause 9

• SAS Port Layer - Clause 8

• SSP Link Layer - Clause 7

• SAS PHY Layer - Clause 6

• SAS Physical Layer - Clause 5

All layers are defined in the following ANSI standard.

• "SAS Protocol Layer - 2 (SPL-3)"

In addition, this drive claims compliance with the following ANSI standards.

• SCSI Architecture Model (SAM-5)

• SCSI Block Commands (SBC-3)

SAS Features

The following SAS features are supported by the drive.

• SAS Compliance

- "Serial Attached SCSI - 3 (SAS-3)"

• SAS Protocol

- This drive supports Serial SCSI Protocol (SSP).

- STP (Tunneled SATA) and SMPs (Management protocols) are NOT supported.

HGST Hard Disk Drive Specification

49

• SAS Dual Ported Operation

- Single PHY ports (i.e. Narrow port. Wide Port NOT supported)

- Ports function independently with separate firmware controls

- Multiple DMA engines capable of accessing either port

- Maximum outstanding credit of four per port

• Physical Link Rates

- G1 (1.5 Gbps), G2 (3.0 Gbps), G3 (6.0 Gbps), and G4 (12.0 Gbps) supported

- Largely automated OOB and speed negotiation sequences

- Optional support for the hot-plug timeout in hardware

• Partial support for Disconnect/Reconnect Mode Page (0x02)

- Maximum Connect Time Limit - SUPPORTED

- Bus Inactivity Time Limit - NOT SUPPORTED

- Maximum Burst Size - SUPPORTED

- First Burst Size - NOT SUPPORTED

• Others...

- Connection Rate Matching

- Hard Reset primitive sequence detection and validation in hardware

- Support for NOTIFY (Power Loss Expected)

- Hashed WWN validation in hardware

- Extended CDB support

HGST Hard Disk Drive Specification

50

SAS Names and Identifiers

Object

SAS Implementation

Port Identifier

SAS address

Port Name

Not defined

Device Name

SAS address

PHY Identifier

PHY identifier

Byte/Bit

7 6 5 4 3 2 1

0

0

NAA (5h)

(MSB)

1

IEEE Company ID

2

3

(LSB)

(MSB)

4

Vendor Specific Identifier

(LSB)

5 6 7

Bit

63-60

59-36

35-24

23-2

1-0

0101

OUI in Canonical Form

Block Assignment

S/N

Object

In SAS, device and port names are worldwide unique names within a transport protocol. Port identifiers are the
values by which ports are identified within a domain, and are used as SAS addresses. PHY identifiers are unique
within a device.

Table 24 Names and Identifiers

Where the SAS address format is defined by ANSI as follows:

Table 25 SAS Address Format

The SAS device name is a unique SAS address worldwide name. This device name is reported through the SCSI
Vital Products Data.
Each of the two SAS ports also has a unique SAS address worldwide name. These port identifiers are reported in
the IDENTIFY address frame and are used as source and destination addresses in the OPEN address frame. They
are also reported through the SCSI Vital Products Data.
Since this drive is one device with two ports it has three SAS addresses. All SAS addresses are in 64-bit IEEE
Registered Name format, as illustrated in Table 26.

Table 26 IEEE Registered Name Format

HGST Hard Disk Drive Specification

51

The Name Address Authority field (5h) specifies the format used for the rest of the name as follows:

Field

Description

OUI

Organizationally Unique Identifier (24 bits). Canonical form means that
each byte is stored in “bit reversed” order.

Block Assignment

Block assignment within HGST, a Western Digital Company

Object

Device Name/Port Identifier
00b Device
01b Port 1
10b Port 2
11b Not assigned

S/N

Sequentially increasing drive serial number assigned at manufacturing.

Table 27 Name Address Authority field

HGST Hard Disk Drive Specification

52

PHY Layer

SAS

Time

Link Reset sequence

Phy Reset sequence

OOB sequence

Speed Negotiation

sequence

Identification sequence

Time

SAS w/Hard Reset

Link Reset sequence with hard error

Phy Reset sequence

Hard Reset sequence

Phy Reset sequence

Identification sequence

The PHY layer defines 8b10b encoding and OOB signals. The PHY layer is the interface between the link layer and
the physical layer. This section describes PHY layer behaviors of the drive. For a complete description of SAS PHY
Layer, please see the ANSI specification, SPL-3.

Link Reset Sequence

The Link Reset sequences for SAS are defined in the SPL-3 ANSI specification with a general overview shown
below. As shown in the diagram, a PHY Reset sequence, consists of an OOB sequence, followed by speed
negotiation. Link Reset sequences will always include a PHY Reset sequence, followed by an Identification
sequence. Inclusion of a Hard Reset sequence is optional. If Hard Reset is performed, it will be preceded by a PHY
Reset sequence, and followed by PHY Reset and an Identification sequence.

Figure 9 Link Reset Sequence

Hard Reset

A Hard Reset sequence on a port will not affect the other port, but the outstanding commands on the other port will
be aborted due to the LUN reset associated with the Hard Reset. The effect of a Hard Reset will be similar to a
Power on Reset, and will result in the re-initialization of all drive resources. The first command issued from every
initiator on the port that received the Hard Reset will result in a CHECK CONDITION with a sense key of UNIT
ATTENTION and an additional sense code of SCSI BUS RESET OCCURRED. The first command issued from
every initiator on the other port will result in a CHECK CONDITION and an additional sense code of BUS DEVICE
RESET OCCURRED.

A Hard Reset sequence will never be issued by the drive. A link reset will be initiated by the drive on the affected
port upon completion of Hard Reset processing.

HGST Hard Disk Drive Specification

53

SAS OOB (Out of Band)

Byte /Bit 7 6 5 4 3 2

1

0

Start =1b

TX SSC

Type = 0b

Reserved

Requested Logical Link Rate = 0h

1

G1 Without

SSC=1b

G1 With

SSC=1b

G2 Without

SSC=1b

G2 With

SSC=1b

G3 Without

SSC=1b

G3 With

SSC=1b

G4 Without

SSC=1b

2

Reserved

3

Reserved

Parity

Out of Band (OOB) signals are low-speed signal patterns detected by the PHY that do not appear in normal data
streams. They consist of defined amounts of idle time followed by defined amounts of burst time. During the idle
time, D.C. idle is transmitted. During the burst time, ALIGN (0) primitives are transmitted repeatedly. The signals are
differentiated by the length of idle time between the burst times.

As a SAS compliant device, the drive uses three OOB signals: COMINIT/COMRESET and COMWAKE and
COMSAS.OOB operations are beyond the scope of this specification. Please refer to the ANSI SPL-3 specification
for more details.

The drive will initiate OOB by sending COMINITs, under the following conditions:

- POR

- Loss of sync

- Identify timeout

SAS Speed Negotiation

The drive supports G1 (1.5 Gbps), G2 (3.0 Gbps), G3 (6.0 Gbps), and G4 (12.0 Gbps) negotiation speeds. The
default maximum negotiation rate is G4 speed (per byte 32 in the PHY Control and Discover Mode Page 19
subpage 1). Drive is SAS3 device and supports SNW-1, SNW-2, SNW-3 speed negotiation with PHY capabilities
exchange, and both transmitter training (Train_Tx-SNW, at 12G only) and receiver training (Train_Rx-SNW or
Train-SNW). The drive’s PHY capabilities are defined in table below:

PHY Capabilities:

Table 28 SAS Speed Negotiation

 Start is set to 1 to indicate the beginning of the PHY capabilities
 TX SSC Type is set to 1 to indicate that PHY’s transmitter uses center-spreading-SSC when SSC is enabled
 TX SSC Type is set to 0 to indicate that PHY’s transmitter uses down-spreading-SSC when SSC is enabled
 Requested Logical Link Rate field is set to 0 to indicate that drive does not support multiplexing
 G1 Without SSC is set to 1 to indicate that drive supports G1 (1.5 Gbps) without SSC
 G2 Without SSC is set to 1 to indicate that drive supports G2 (3.0 Gbps) without SSC
 G3 Without SSC is set to 1 to indicate that drive supports G3 (6.0 Gbps) without SSC
 G4 Without SSC is set to 1 to indicate that drive supports G4 (12.0 Gbps) without SSC
 G1 With SSC set to 1 to indicate that drive supports G1 (1.5 Gbps) with SSC
 G2 With SSC set to 1 to indicate that drive supports G2 (3.0 Gbps) with SSC
 G3 With SSC set to 1 to indicate that drive supports G3 (6.0 Gbps) with SSC
 G4 With SSC is set to 1 to indicate that drive supports G4 (12.0 Gbps) with SSC
 Parity is set to 1 for even parity of the total number of SNW-3 PHY capabilities, including Start bit.

Training is based on the highest untried commonly supported settings on the exchanged SNW-3 supported settings
bits. If a Train-SNW is invalid and there are additional, untried, commonly supported settings exchanged during
SNW-3, then a new Train-SNW will be performed based on the next highest untried, commonly supported settings.
Table 29 Supported Settings Bit Priorities defines the priority of the supported settings bits.

HGST Hard Disk Drive Specification

54

Priority

Bit

Highest

G4 With SSC bit

...

G4 Without SSC bit

...

G3 With SSC bit

...

G3 Without SSC bit

...

G2 With SSC bit

…

G2 Without SSC bit

…

G1 With SSC bit

G1 Without SSC bit

Lowest

Table 29 Supported Settings Bit Priorities

Error

Error Handling Procedure

Link Reset

After POR or Hard Reset, the drive initiates link reset by transmitting exactly
1 COMINIT. For other resets, the drive does not initiate Link Reset.

COMINIT Timeout

If COMINIT or COMSAS is not received before the ”Hot Plug Timeout" period
expires, the drive continues to transmit DC zero and wait for COMINIT/COMSAS.
Firmware is notified.
This is not considered an error.

COMSAS Timeout

If COMINIT is detected, COMSAS is transmitted, and COMSAS is not received
before the COMSAS Detect Timeout timer expires, firmware is notified and the
drive continues to transmit DC zero and wait for COMINIT.

Speed Negotiation Errors

If speed negotiation fails with no match, or if the drive fails retrying the matched
link rate, firmware is notified and the drive continues to transmit DC zero and wait
for COMINIT. If the match link rate retry fails, the PHY Reset Problem counter is
incremented (Log Page 0x18).

Loss of Sync

If the drive loses Dword sync long enough for the loss of sync timer to expire,
firmware is notified and the drive transmits a COMINIT to initiate a new link reset.
The loss of Dword sync counter is incremented (Log Page 0x18).

Disparity/Invalid Dword Error

If a disparity error or an invalid Dword is detected by the drive, the Invalid Dword
Count is incremented (Log Page 0x18). The Running Disparity Error Count in Log
Page 0x18 is not used

PHY Error Handling

This section defines the PHY layer error handling of the drive.

Table 30 PHY Layer Error Handling

HGST Hard Disk Drive Specification

55

Link Layer

Byte

Bit

7 6 5 4 3 2 1

0

0

RSVD

Device Type

Address Frame Type

1-27

Frame Type Dependent bytes

28-31

CRC

Value

Address Frame Type Description

0000b

IDENTIFY: Identification Sequence

0001b

OPEN: Connection Request

Others

Reserved

The SAS Link layer defines primitives, address frames, and connections. The Link layer is the interface between the
Port layer and the PHY layer. This section describes Link layer behaviors of the drive. For a complete description of
SAS Link layer, please see the ANSI specification, SPL-3.

Address Frames

Address frames are used for the identification sequence and for connection requests and are only sent outside
connections. The Address Frame format is defined below:

Table 31 Address Frame Format

 Address Frame Type indicates the type of address frame and is defined in Table 32. This field determines the

definition of the frame type dependent bytes.

Table 32 Frame Type:

HGST Hard Disk Drive Specification

56

Identify Address Frame

Byte

Bit

7 6 5 4 3 2 1

0

0

RSVD

Device Type = 1h

Address Frame Type = 0

1

Reserved

Reason

2

Reserved

SSP

Initiator Port

STP

Initiator Port

SMP

Initiator Port

RSVD

3

Reserved

SSP

Target Port

STP

Target Port

SMP

Target Port

RSVD

4-11

Device Name

12-19

SAS Address

20

PHY Identifier

21

Persistent

Capable

Power Capable

Slumber
Capable

Partial

Capable

Inside

ZPSDS

Persistent

Requested

Inside

ZPSDS

Break_Reply

Capable=1b

22

Pwr_DIS

Capable

23-27

Reserved

28-31

CRC

The Identify Address Frame format is used for the identification sequence. The Identify Address Frame is sent after
the PHY reset sequence completes. The Identify Address Frame format is defined as follows:

Table 33 Identify Address Frame

 Device Type is set to 001b to indicate that this drive is an "End Device"
 Address Frame Type is set to 00b to indicate that this is an IDENTIFY
 Reason indicates the reason for link reset sequence as defined in Table 34
 Initiator Port bits is set to 000b since this device is a target device only
 Target Port bits is set to 100b since this device is a SSP target device only
 Device Name contains Target Device Identifier
 SAS Address contains the port identifier of the SAS port transmitting this frame
 PHY Identifier contains the PHY identifier of the PHY transmitting this frame
 Persistent Capable is set to 0b to indicate the drive does not support persistent connections
 Power Capable is set to 00b to indicate drive does not issue PWR_REQ or PWR_DONE, and does not respond

to PWR_GRANT

 Slumber Capable is set to 0b to indicate drive does not support slumber power PHY mode
 Partial Capable is set to 0b to indicate drive does not support partial power PHY mode
 Inside ZPSDS Persistent: set to 0b since this is an "End Device"
 Requested Inside ZPSDS: set to 0b since this is an "End Device"
 Break_Reply Capable: set to 1b to indicate that this port is capable of sending BREAK_REPLY primitive

sequence in responding of receiving BREAK primitive sequences

 Pwr_DIS Capable is set to 1b to indicate the drive does support the PWR_DIS signal as defined in SAS-3

HGST Hard Disk Drive Specification

57

Value

Address Frame Type Description

00b

Power on

01b

OPEN: Connection Request

02b

Hard Reset

(received a Hard Reset during hard reset sequence)

04b

Loss of Dword synchronization

07b

Break timeout timer expired

08b

PHY test function stopped

Others

RESERVED

Table 34 Reason Field

Byte

Bit

7

6 5 4 3 2 1 0

0

Initiator Port=0

Protocol = 1

Address Frame Type = 1

1

Features = 0

Connection Rate = 8h, 9h, Ah, or Bh

2-3

Initiator Connection Tag

4-11

Destination SAS Address

12-19

Source SAS Address

20

Source Zone Group

21

Pathway Blocked Count

22-23

Arbitration Wait Time

24-27

More Compatible Features

28-31

CRC

Open Address Frame

The Open Address Frame format is used for the identification sequence. The Open Address Frame is sent after the
PHY reset sequence completes. The Open Address Frame format is defined as follows:

Table 35 Open Address Frame Format

 Initiator Port is set to zero when the drive is the source port acting as a SAS target
 Protocol is set to 001b to indicate SSP Protocol
 Features is set to zero and ignored by the drive per SPL-3
 Connection Rate is set to 8h (1.5Gbps), 9h (3Gbps), Ah (6Gbps), or Bh (12Gbps), depending on requested link

rate. Rate matching is supported by the drive, therefore if the link to the drive is 3.0Gbps, and the Connection Rate
is 1.5Gbps, the drive will insert ALIGNs between Dwords, to match the Connection Rate.

 Initiator Connection Tag is set by the drive to the last value received from this Initiator.
 Destination SAS Address contains the port identifier of the SAS port to which a connection is being requested.
 Source SAS Address contains the port identifier on the port that originated this frame (i.e. the drive’s port address).
 Source Zone Group is set to zero and ignored by the drive per SPL-3

HGST Hard Disk Drive Specification

58

 Pathway Blocked Count indicates the number of times the port has retried this connection request due to

Error

Error Handling Procedure

IDENTIFY Timeout

If IDENTIFY is not received before the IDENTIFY timer expires (1ms), firmware is
notified and the drive transmits a COMINIT to initiate a new link reset.

BREAK Received

If BREAK is received while the drive has ACK/NAK balance, BREAK or BREAK_REPLY
is transmitted and a new connection may be opened if the drive still has frames to
transmit. Firmware is not notified. If BREAK is received while the drive does NOT
have ACK/NAK balance, BREAK or BREAK_REPLY is transmitted and the current
command is aborted and will return Check Condition status with sense data indicating
an ACK/NAK timeout.

NAK and ACK/

NAK Timeout

If a NAK is received on a RESPONSE frame, the RESPONSE frame is retransmitted
with the RETRANSMIT bit set to one. If an ACK or NAK is not received for a
RESPONSE frame within 1ms, the RESPONSE frame will be retransmitted with the
RETRANSMIT bit set to one. The drive will retry sending a RESPONSE frame once.

Bad Frame CRC

If a frame fails the CRC check, the frame is NAKed by the drive and discarded. This is
a link layer function. The command associated with a NAKed DATA or XFER_RDY
frame is aborted with check condition status and sense data corresponding to
DATA_PHASE_ERROR is returned. COMMAND frames that fail the CRC check are
NAKed and discarded.

receiving OPEN_REJECT (PATHWAY BLOCKED). The drive will not increment the PATHWAY BLOCKED COUNT
value past FFh.

 Arbitration Wait Time indicates how long the port transmitting the OPEN address frame has been waiting for a

connection request to be accepted. For values from 0000h to 7FFFh, the Arbitration Wait Time timer increments
in one microsecond steps. For values from 8000h to FFFFh, the Arbitration Wait Time timer increments in one
millisecond step.

 More Compatible Features is set to zero and ignored by the drive per SPL-3.

Link Layer Error Handling

This section defines the Link layer error handling of the drive.

Table 36 Link Layer Error Handling (part 1 of 2)

HGST Hard Disk Drive Specification

59

Error

Error Handling Procedure

OPEN_REJECT

OPEN_REJECT – Retry-able Variations

 OPEN_REJECT(RETRY) - Will be retried indefinitely by the drive. This case is

considered to occur when the initiator is temporarily not available to accept
connections

 OPEN_REJECT(RATE_NOT_SUPPORTED) – If this occurs, it must mean that

a link between the drive and initiator negotiated to a lower link rate after the
command was received. The drive will retry at the connection at a lower rate,
and if a connection eventually fails for this session at 1.5Gbps, the command is
internally aborted.

 OPEN_REJECT – (PATHWAY_BLOCKED) – handled the same as

OPEN_REJECT(RETRY)

 OPEN_REJECT(BAD_DESTINATION) – handled the same as

OPEN_REJECT(RETRY)
OPEN_REJECT – Non-Retry-able Variations – If these are received, the command is
internally aborted by the drive

 OPEN_REJECT(BAD_DESTINATION)
 OPEN_REJECT(WRONG_DESTINATION)
 OPEN_REJECT(PROTOCOL_NOT_SUPPORTED)

Credit Timeout

If credit is not received before the credit timer expires, DONE(CREDIT_TIMEOUT) is
sent to the Initiator.

DONE Timeout

If credit is extended and the DONE timer expires, BREAK is sent by hardware to tear
down the connection.

CREDIT_BLOCKED

If CREDIT BLOCKED is received and the drive has frames to send in the current
connection, DONE(CREDIT_TIMEOUT) is returned. Otherwise, DONE(NORMAL) is
returned.

OPEN Frame Checking

Reserved fields in the OPEN frame are not checked.

 The Dest Address field is checked, and if it doesn’t match

OPEN_REJECT(WRONG_DESTINATION) is returned.

 The Protocol field is checked and if it isn’t set to SSP

OPEN_REJECT(PROTOCOL_NOT_SUPPORTED) is returned.

 If the Link Rate exceeds the physical link rate on that port,

OPEN_REJECT(LINK_RATE_NOT_SUPPORTED) is returned.

 The Initiator bit is not checked.

OPEN Response

Timeout

If AIP or OPEN_ACCEPT is not received before the OPEN Response timer expires, the
hardware transmits BREAK.

CLOSE Timeout

If CLOSE is not received before the CLOSE timer expires, the hardware transmits
BREAK.

PHY Not Ready

If Link Reset occurs outside of a connection, commands can execute normally across
the link reset. If a link reset occurs inside of a connection, the behavior is similar to
BREAK in that it is treated as an abruptly closed connection. In cases where the
command cannot be continued normally (e.g. a frame is corrupted by OOB signals, or
we do not have ACK/NAK balance), the command is terminated with CHECK
CONDITION status with sense data corresponding to ACK/NAK TIMEOUT.

Table 37 Link Layer Error Handling (part 2 of 2)

HGST Hard Disk Drive Specification

60

Transport Layer

Byte

Bit

7 6 5 4 3 2 1 0 0

Frame Type

1-3

Hashed Destination Address

4

Reserved

5-7

Hashed Source Address

8-9

Reserved

10

Reserved

TLR Control = 00b

Retry Data

Frames =0b

Retransmit

RSVD

11

Reserved

# of fill bytes

12-15

Reserved

16-17

Tag

18-19

Target Port Transfer Tag

20-23

Data Offset

24-m

Information Unit

Fill Bytes (if needed)

(n-3)-n

CRC

Code

Name of Frame

Information Unit

Originator

IU Size (bytes)

01h

DATA

Data

Initiator or Target

1-1024

05h

XFER_RDY

Data Transfer Ready

Target

12

06h

COMMAND

Command

Initiator

28-284

07h

RESPONSE

Response

Target

24-1024

16h

TASK

Task Management Function

Initiator

28

f0-ffh

Vendor Specific

all others

Reserved

The Transport layer defines frame formats. The Transport layer is the interface between the Application layer and
Port layer. It is responsible for constructing and parsing frame contents. For SSP, the Transport layer only receives
frames from the Port layer that are going to be ACKed by the Link layer. This section describes Transport layer
behaviors of the drive. For a complete description of SAS Transport layer, please see the ANSI specification, SPL-

3.
The Transport layer defines the frame format as follows.

Table 38 SAS Frame Format

FRAME TYPE field, which defines the format of the INFORMATION UNIT field as follows:

Table 39 FRAME TYPE Field

 Hashed Destination SAS Address contains the hashed value of the destination SAS address
 Hashed Source SAS Address contains the hashed value of the source SAS address
 TLR Control is not supported
 Retry Data Frames is not supported
 Changing Data Pointer is not supported
 Number of Fill Bytes indicates the number of fill bytes between the INFORMATION UNIT field and the CRC

field. The Retransmit bit is set to one for RESPONSE frames when attempting to retransmit this frame due to
receiving an error during the initial transmission. It shall be set to zero for all other frame types. The Number of
Fill Bytes field shall be set to zero for all frame types except DATA frames

HGST Hard Disk Drive Specification

61

 Tag field contains a value that allows the SSP port to establish a context for commands and task management

Byte

Bit

7

6 5 4 3 2 1 0

0-7

Logical Unit Number

8

Reserved

9

Disable First Burst=0

Reserved

Task

Attribute

10

Reserved

11

Additional CDB Length (in Dwords)

Reserved

12-27

CDB

28-n

Additional CDB Bytes

Value

Attribute

000b

Simple_Q

001b

Head_of_Q

010b

Ordered_Q

100b

ACA_Q (not supported)

101b

Reserved

functions

 Target Port Transfer Tag is set and used by the drive. The initiator should echo this field in outbound data IU.
 Information Unit contains the information unit, the format of which is defined by the FRAME TYPE field.
 Fill bytes shall be included after the INFORMATION UNIT field so the CRC field is aligned on a four byte

boundary.

Command Information Unit

The COMMAND frame is sent by an SSP initiator port to request that a command be processed by the drive.

Table 40 COMMAND Information Unit

 Logical Unit Number contains the address of the logical unit. The drive only supports a LUN of 0’s.
 Disable First Burst is not supported by the drive

Task Attribute is defined as follows:

Table 41 Task Attribute Field

 Additional CDB Length contains the length in Dwords (four bytes) of the ADDITIONAL CDB field.
 CDB and Additional CDB Bytes together contain the CDB.

HGST Hard Disk Drive Specification

62

TASK Information Units

Byte

Bit

7 6 5 4 3 2 1

0

0-7

Logical Unit Number

8-9

Reserved

10

Task Management Function

11

Reserved

12-13

Tag of Task to be Managed

14-27

Reserved

Value

Function

01h

ABORT TASK: The drive shall perform the ABORT TASK associated with the value of the TAG OF
TASK TO BE MANAGED field

02h

ABORT TASK SET: The drive shall perform the ABORT TASK SET by aborting all outstanding tasks
for the Initiator that sent the TMF.

04h

CLEAR TASK SET: This TMF causes the drive to abort all tasks in the task set. The action is
equivalent to receiving a series of Abort Task requests from all Initiators.

A unit attention condition shall be generated for all other Initiators with tasks in the task set. The
Additional Sense Code shall be Commands cleared by another Initiator.

08h

LUN RESET: The LUN RESET causes the Target to execute a hard reset. This means:

1. Abort all tasks for all Initiators on either both ports.

2. Release any device reservation on either port.

3. Set a Unit Attention condition for all Initiators.

10h

I_T NEXUS RESET: The I_T NEXUS RESET causes the drive to abort all outstanding tasks for the
Initiator that sent the TMF. In addition, a Unit Attention is set for the initiator that sent the TMF,
indicating I_T NEXUS LOSS. This TMF does not affect task sets for other initiators.

40h

CLEAR ACA (not supported)

80h

QUERY TASK: The drive shall return a response of FUNCTION SUCCEEDED if the specified task
exists, or FUNCTION COMPLETE if the specified task does not exist.

81h

QUERY TASK SET: The drive shall return a response of FUNCTION SUCCEEDED if there is any task
exist, or FUNCTION COMPLETE if there is no task exist.

82h

QUERY ASYNCHRONOUS EVENT (formerly QUERY UNIT ATTENTION): The drive shall return a
response of FUNCTION SUCCEEDED if there is a unit attention or a deferred error pending, or
FUNCTION COMPLETE if there is no unit attention or no deferred error pending.

others

RESERVED: The Drive will return a RESPONSE frame with the DATAPRES field set to
RESPONSE_DATA and its RESPONSE CODE field set to TASK MANAGEMENT FUNCTION NOT
SUPPORTED.

Table 42 TASK Information Unit

 Logical Unit Number field contains the address of the logical unit. The drive only supports a LUN of 0’s.
 Task Management Function field is defined as follows:

Table 43 TASK MANAGEMENT FUNCTION Field

HGST Hard Disk Drive Specification

63

 If TMF is set to ABORT TASK or QUERY TASK, the Tag of Task to be Managed field specifies the TAG value

Byte

Bit

7 6 5 4 3 2 1 0 0

Reserved

UADE Depth

Sense Key

1

Additional Sense Code

2

Additional Sense Code Qualifier

Code

Description

00b

The combined number of unit attention conditions and deferred errors is unknown

01b

The combined number of unit attention conditions and deferred errors is one

10b

The combined number of unit attention conditions and deferred errors is greater than one

11b

Reserved

Byte

Bit

7 6 5 4 3 2 1 0 0 - 3

Requested Offset

4 - 7

Write Data Length

8 - 11

Reserved

Byte

Bit

7 6 5 4 3 2 1

0

0 - (n-1)

Data

from the COMMAND frame that contained the task to be aborted or checked. For all other TMF’s, this field is

ignored.

 If TMF is set to QUERY ASYNCHRONOUS EVENT, the Additional Response Information argument is set to

000000h for the response of FUNCTION COMPLETE. If the response is FUNCTION SUCCEED, the Additional
Response Information argument is set as defined in

Table 44 Additional Response Information Argument for Query Async Event

 UADE Depth is the number of pending unit attention conditions or deferred errors. It is defined as in
 Sense Key is the value of the SENSE KEY field in the highest-priority pending unit attention condition or

deferred error.

 Additional Sense Code is the value of the ADDITIONAL SENSE CODE field in the highest-priority pending unit

attention condition or deferred error.

 Additional Sense Code Qualifier is the value of the ADDITIONAL SENSE CODE QUALIFIER field in the

highest-priority pending unit attention condition or deferred error

Table 45 UADE DEPTH Field

XFER_RDY Information Units

The XFER_RDY frame is sent by the drive to request write data (i.e. out bound data) from the initiator.

Table 46 XFER_RDY Information Units

 Requested Offset contains the buffer offset of the segment of write data the Initiator may transmit to the drive

(using DATA frames). The requested offset shall be a multiple of four.

 Write Data Length contains the number of bytes of write data the Initiator may transmit to the drive (using

DATA Information Units

The DATA frame is sent by the drive to the Initiator (in bound data) or by the Initiator to the drive (out bound data).

Table 47 Data Information Unit

HGST Hard Disk Drive Specification

64

RESPONSE Information Units

Byte

Bit

7 6 5 4 3 2 1

0

0-7

Reserved

8-9

MSB

Retry Delay Timer

LSB

10

Reserved

DataPres

11

Status

12 - 15

Reserved

16 - 19

Sense Data Length (n bytes)

20 - 23

Response Data Length (m bytes)

24 - (24+m)

Response Data

(24+m) -(23+m+n)

Sense Data

Status Code

Retry Delay
Timer Code

Description

BUSY

0000h

Same as normal busy

0001h-FFEFh

The number of 100 milliseconds increments which Initiator should wait
before sending another command to drive

FFF0h-FFFDh

Reserved

FFEFh

Initiator should stop sending commands to drive

FFFFh

Drive is not able to accept the command

0000h

Same as normal busy

QUEUE FULL

0001h-FFEFh

Initiator should wait before sending another command to the drive until:

a) At least the number of 100 milliseconds increments indicated in

the RETRY DELAY TIMER CODE field have elapsed; or

b) A command addressed to the drive completes.

FFF0h-FFFFh

Reserved

GOOD

0000h-FFFFh

Reserved

Status Code

Retry Delay Timer

Code

Description

CHECK CONDITION

0000h-FFFFh

Reserved

CONDITION MET

0000h-FFFFh

Reserved

RESERVATION

CONFLICT

0000h-FFFFh

Reserved

ACA ACTIVE

0000h-FFFFh

Reserved

TASK ABORT

0000h-FFFFh

Reserved

The RESPONSE frame is sent by the drive to the Initiator (in bound data) or by the Initiator to the drive (out bound
data).

Table 48 Response Information Unit

Retry Delay Timer contains the retry delay timer code which is defined as follows:

Table 49 RETRY DELAY TIMER Field (part 1 of 2)

Table 50 RETRY DELAY TIMER Field (part 2 of 2)

HGST Hard Disk Drive Specification

65

DataPres indicates the format and content of the STATUS field, SENSE DATA LENGTH field, RESPONSE DATA

Value

DATAPRES Description

00b

NO DATA: no data present

01b

RESPONSE_DATA: response data present

10b

SENSE_DATA: sense data present

11b

Reserved

Byte

Bit

7 6 5 4 3 2 1

0

0 - 2

Reserved

3

Response Code

Value

DATAPRES Description

00b

Task Management Function complete

02b

Invalid Frame

04b

Task Management Function not supported

05b

Task Management Function failed

08b

Task Management Function succeeded

09b

Invalid LUN

others

Reserved

LENGTH field, RESPONSE DATA field, and SENSE DATA field.

Table 51 DATAPRES Field

Table 52 RESPONSE Data

Response Codes are defined as follows:

Table 53 RESPONSE Codes

HGST Hard Disk Drive Specification

66

Sequences of SSP Information Units

Initiator

Target

Data IU (s)

Response IU

Time

Time

Time

Time

Read Type Command

IU Sequence

Write Type Command

IU Sequence

Command IU

Command IU

Xfr_Rdy IU

Data IU (s)

Response IU

Initiator

Target

SSP Information Units are used in conjunction with one another to execute SCSI commands. This section provides
a brief overview of SAS SSP Information Unit sequences that would be required to complete a SCSI command.

Figure 10 SSP Information Unit Sequences

HGST Hard Disk Drive Specification

67

Transport Layer Error Handling

Error

Error Handling Procedure

SSP Header Field Checking

Reserved fields in SSP frames are not checked.

Data Offset Error

If a DATA frame with an invalid Data Offset is received, the command
associated with the DATA frame is aborted with Check Condition status
and sense data corresponding to a DATA OFFSET ERROR is returned

I_T NEXUS Loss Timeout

If a connection cannot be established to an Initiator before the I_T NEXUS
LOSS timer expires (Mode Page 0x19), all commands from the Initiator are
internally aborted. The first new command received from the affected
Initiator results in a CHECK CONDITION with sense data corresponding to
I_T NEXUS LOSS OCCURRED.

Initiator Response Timeout

If DATA frames corresponding to an outstanding XFER_RDY frame are not
received before the Initiator Response timer expires (Mode Page 0x19), the
command is aborted with CHECK CONDITION status and sense data
corresponding to INITIATOR RESPONSE TIMEOUT is returned for the
affected command.

Data Overflow

If more data is received than requested via an XFER_RDY frame, the
affected command is aborted with CHECK CONDITION status with sense
data corresponding to TOO MUCH WRITE DATA is returned.

Invalid Target Port Transfer Tag

If a DATA frame is received and the TPTT is not set to the value used in
the corresponding XFER_RDY frame, the frame is discarded. If a
COMMAND or TASK frame is received with the TPTT set to a value other
than 0xFFFF, a RESPONSE frame with RESPONSE_DATA set to
INVALID FRAME is returned.

Invalid Frame Length

If a DATA frame is received with zero bytes of payload data, the frame is
discarded. This is not considered an error. If a COMMAND/TASK frame
that is too short is received, RESPONSE data corresponding to INVALID
FRAME is returned. The additional CDB length field of a COMMAND frame
is not checked for correctness. If a DATA frame is received with a payload
greater than 1024 bytes, the frame is discarded and the command is
aborted with CHECK CONDITION status and sense data corresponding to
DATA_PHASE_ERROR is returned.

This section defines the Transport layer error handling by the drive.

Table 54 Transport Layer Error Handling

HGST Hard Disk Drive Specification

68

SCSI Command Set

Type

Code

Description

M

04h

FORMAT UNIT (04)

M

12h

INQUIRY (12)

O

4Ch

LOG SELECT (4C)

O

4Dh

LOG SENSE (4D)

O

15h

MODE SELECT (15)

O

55h

MODE SELECT (55)

O

1Ah

MODE SENSE (1A)

O

5Ah

MODE SENSE (5A)

O

5Eh

PERSISTENT RESERVE IN (5E),

O

5Fh

PERSISTENT RESERVE OUT (5F)

O

34h

PRE-FETCH (34)

O

90h

PRE-FETCH (90)

M

08h

READ (6) - (08)

M

28h

READ (10) - (28)

O

A8h

READ (12) - (A8)

O

88h

READ (16) - (88)

O

7Fh/09h

READ (32) - (7F/09)

O

3Ch

READ BUFFER (3C)

M

25h

READ CAPACITY (10) - (25)

O

9Eh/10h

READ CAPACITY (16) (9E/10)

O

37h

READ DEFECT DATA (37)

O

B7h

READ DEFECT DATA (B7)

O

3Eh

READ LONG (3E),page 207

O

9Eh

READ LONG (9E),page 208

O

07h

REASSIGN BLOCKS (07)

O

1Ch

RECEIVE DIAGNOSTICS RESULTS (1C)

M

17h

RELEASE (17)

O

57h

RELEASE (57)

O

A3h/05h

REPORT DEVICE IDENTIFIER (A3/05)

O

A0h

REPORT LUNS (A0)

O

A3h/0Ch

REPORT SUPPORTED OPERATION CODES (A3/0C)

O

A3h/0Dh

REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS (A3/0D)

M

03h

REQUEST SENSE (03)

M

16h

RESERVE (16)

Summaries of the SCSI commands supported by the drive are listed below. O = optional, M = mandatory

Table 55 SCSI Commands Supported (part 1 of 2)

HGST Hard Disk Drive Specification

69

Type

Code

Description

O

56h

RESERVE (56)

O

01h

REZERO UNIT (01)

O

48h

SANITIZE (48)

O

A2h

SECURITY PROTOCOL IN (A2)

O

B5h

SECURITY PROTOCOL OUT (B5)

M

1Dh

SEND DIAGNOSTIC (1D)

O

A4h/06h

SET DEVICE IDENTIFIER (A4/06)

O

1Bh

START STOP UNIT (1B)

O

35h

SYNCHRONIZE CACHE (10) - (35)

O

91h

SYNCHRONIZE CACHE (16) - (91)

M

00h

TEST UNIT READY (00)

O

2Fh

VERIFY (10) - (2F)

O

AFh

VERIFY (12) - (AF)

O

AFh

VERIFY (16) - (8F)

O

7Fh/0Ah

VERIFY (32) - (7F/0A)

M

0Ah

WRITE (6) - (0A)

M

2Ah

WRITE (10) - (2A)

O

AAh

WRITE (12) - (AA)

O

8Ah

WRITE (16) - (8A)

O

7Fh/0Bh

WRITE (32) - (7F/0B)

O

2Eh

WRITE AND VERIFY (10) - (2E)

O

AEh

WRITE AND VERIFY (12) - (AE)

O

8Eh

WRITE AND VERIFY (16) - (8E)

O

7Fh/0Ch

WRITE AND VERIFY (32) - (7F/0C)

O

3Bh

WRITE BUFFER (3B)

O

3Fh

WRITE LONG (10) (3F)

O

9Fh

WRITE LONG (16) (9F)

O

41h

WRITE SAME (10) - (41)

O

93h

WRITE SAME (16) - (93)

O

7Fh/0Dh

WRITE SAME (32) - (7F/0D)

Table 56 SCSI Commands Supported (part 2 of 2)

HGST Hard Disk Drive Specification

70

SCSI Control Byte

Bit

7 6 5 4 3 2 1

0

VU = 0

Reserved = 0

LUN

Logical Unit Number. An encoded three bit identifier for the logical unit.

VU

Vendor Unique bits

LBA

Logical Block Address

RSVD

Reserved

MSB

Most Significant Byte

LSB

Least Significant Byte

The Control Byte is the last byte of every CDB. The format of this byte is shown below.
VU = VU stands for Vendor Unique.

Table 57 SCSI Control Byte

Note: * - The drive ignores the link bit and flag bit in the CDB.

Abbreviations

These abbreviations are used throughout the following sections:

Byte ordering conventions

In this specification, where it is not explicitly stated, all multi-byte values are stored with the most significant byte
first. For example, in a 4 byte field, byte 0 will contain the MSB and byte 3 the LSB.

HGST Hard Disk Drive Specification

71

FORMAT UNIT (04)

Byte

Bit

7 6 5 4 3 2 1 0 0

Command Code = 04h

1

FMTPINFO

LONG

LIST=0

FMTDATA

CMPLIST

Defect List Format

2

VU = 0

3-4

Obsolete = 0

FFMT

5

VU = 0

Reserved = 0

FLAG

LINK

Format

Description

000b

Block format

100b

Bytes From Index format

101b

Physical Sector format

FFMT

Description

00b

Perform defect management and initialize media to the new format.

01b

Perform defect management but do not initialize the media. May result in any medium error on
read before write.

10b

Change block size only. May only be used on transitions of physically compatible size such as
between 512 + end-to-end protection and 520. May result in end-to-end protection errors on
read before write.

11b

Reserved

Table 58 FORMAT UNIT

- FMTPINFO (Format Protection Information) in combination with the Protection Field Usage field in the

Parameter List Header specifies whether or not the drive enables or disables the use of protection information
(see table defined in the Parameter List Header section).

- FmtData set to one specifies that a Data Out phase follows the Command phase. The Data Out phase
consists of a Parameter List header, optionally followed by an Initialization Pattern Descriptor, optionally
followed by a Defect List. If FmtData=0, the following defaults are assumed: DPRY=0, DCRT=1, STPF=1,
IP=0, DSP=0, Immed=0.

- CmpLst

- Set to one specifies that the Grown Defect List (GList) existing prior to the issuance of the Format Unit

command be discarded. If provided, the DList then becomes the GList. Following these operations, the Drive
will be formatted with the PList and GList.

- Set to zero specifies that the GList existing prior to the issuance of the Format Unit command is retained. If
provided, the DList is combined with the GList to become the new GList. Following these operations, the Drive
will be formatted with the PList and GList.

Note: The drive manages two internal defect lists and one external. The Plist is created at time of manufacture. The

Glist is built after manufacture by the Initiators’ use of the REASSIGN BLOCK command and the Automatic
Reallocate functions. The Dlist is an external list. It is supplied by the Initiator in the Data Out phase of the FORMAT
UNIT command.

- Defect List Format specifies the format of the defect descriptor transferred to the Target when FmtData bit is
set to one. The Target supports the following three defect descriptor formats for the FORMAT UNIT command:

If the FmtData bit is set to zero, this field must also be zero. Otherwise the command will complete with a CHECK
CONDITION with a sense key of Illegal Request and an additional sense code of Invalid Field in CDB.

- FFMT specifies the scope of the format command.

Notes: It is recommended that the MODE SELECT command be issued prior to the FORMAT UNIT command to
specify parameters that affect the formatting process.

HGST Hard Disk Drive Specification

72

The Block Length parameter of the Mode Select Parameter List’s Block Descriptor is used during formatting and is
saved following a successful format operation. If a MODE SELECT command has not been issued since the last
reset or start-up (bring-up) sequence, then the Block Length from the previous format operation is used.

Subsequent to receiving a FORMAT UNIT command, the Target responds to commands as follows:

- All commands except REQUEST SENSE and INQUIRY return Check Condition status, while the format
operation is an active I/O process.

- When tagged queuing is enabled (DQue = 0), all commands except REQUEST SENSE and INQUIRY return
Queue Full status, while the FORMAT UNIT command is a queued I/O process.

- When tagged queuing is disabled (DQue = 1), all commands except REQUEST SENSE and INQUIRY return
Busy status, while the FORMAT UNIT command is a queued I/O process

- If a REQUEST SENSE command is received while a format operation is an active I/O process, the Target
returns Good status. The sense key is set to Not ready and the additional sense code and qualifier is set to
Format In Progress.

- If an INQUIRY command is received while a format operation is an active I/O process, the Target returns Good
status and Inquiry data as requested.

The format operation must complete successfully for the Drive to be usable. If the command is interrupted by a
reset, power down, or an unrecoverable error, the Drive enters a degraded mode of operation in which reading and
writing are prohibited. To exit the degraded mode, another FORMAT UNIT command must be sent by the Initiator
and completed successfully by the Target.

The FORMAT UNIT command sets the Unit Attention Condition for all Initiators except the one that issued the
FORMAT UNIT command.

HGST Hard Disk Drive Specification

73

Parameter List Header

Byte

Bit

7 6 5 4 3 2 1 0 0

Reserved = 0

Protection Field Usage

1

FOV

DPRY

DCRT

STPF =1

IP

Obsolete

Immed

Vendor-specific

2 -3

(MSB)

Defect

List Length(LSB)

4-n

Initialization Pattern Descriptor

(n+1) - m

Defect Descriptor

Byte

Bit

7 6 5 4 3 2 1

0

0

Reserved = 0

Protection Field Usage

1

FOV

DPRY

DCRT

STPF =1

IP

Obsolete

Immed

Vendor-specific

2

Reserved

3

P_I_INFORMATION = 0

PROTECTION INTERVAL EXPONENT = 0

4

(MSB)

DEFECT LIST LENGTH

(LSB)

... 7 8-n

Initialization Pattern Descriptor

(n+1) - m

Defect Descriptor

FMTPINFO

Protection

Field Usage

Description

00h

000h

The drive will be formatted to type 0 protection

01h

xxxh

Check Condition status will be returned with the sense key set to Illegal Request
and the additional sense code set to Invalid Field in the CDB.

10h

000h

The drive will be formatted to type 1 protection

11h

000h

The drive will be formatted to type 2 protection

11h

001h

Type 3 protection is not supported - Check Condition status will be returned with
the sense key set to Illegal Request and the additional sense code set to Invalid
Field in the Parameter List

Following is the format of the Parameter List Header sent during the data out phase when FmtData is set to one.

Table 59 Format of the Short Parameter List Header

Table 60 Format of the Long Parameter List Header

- Protection Field Usage: in combination with the format protection information (FMTPINFO) field in the CDB

specifies whether or not the drive enables or disables the use of protection information:

Table 61 Format of the Long Parameter List Header

All other combinations of FMTPINFO and Protection Field Usage will result in Check Condition status to be returned
with the sense key set to Illegal Request and the additional sense code set to Invalid Field in the Parameter List.

HGST Hard Disk Drive Specification

74

Type 0 protection specifies that the drive shall disable the use of protection information and format to the block size

Byte

Bit

7 6 5 4 3 2 1 0 0... n

User Data

n... n+1

Logical Block Guard

n+2... n+3

Logical Block Application Tag

n+4... n+7

Logical Block Reference Tag

specified. Following a successful format, the PROT_EN bit in the READ CAPACITY (16) parameter data will
indicate that protection information is disabled.

Type 1 and type 2 protection specifies that the drive shall enable the use of protection information and format to the
block size specified + 8 (e.g., if the block length is 512, then the formatted block length is 520). See format of data
below. When protection information is written during a FORMAT UNIT command, protection information shall be
written with a default value of all 0xFF's. Following a successful format, the PROT_EN bit in the READ CAPACITY
(16) parameter data will indicate that protection information is enabled and the P_TYPE field in the READ
CAPACITY (16) parameter data will indicate the protection type.

Table 62 Data Format with Protection field

- The Logical Block Guard field contains a CRC that covers the preceding user data. This field is

generated/checked per the SBC standard.

The Logical Block Application Tag field may be modified by the initiator if the ATO bit is set to zero in mode page
0x0A. If the ATO bit is set to one, then the initiator shall not modify the Logical Block Application Tag field. This field
is generated/checked per the SBC standard.

- The Logical Block Reference Tag field is generated/checked depending on protection types. With Type 1
protection, the Logical Block Reference Tag in the first logical block of the data transfer shall contain the least
significant four bytes of the LBA contained in the Logical Block Address field of the command. Subsequent
blocks shall contain the previous logical block reference tag plus one. With Type 2 protection, the Logical Block
Reference Tag in the first logical block of the data transfer shall contain the value in the Expected Initial Logical
Block Reference Tag field of the command. Subsequent blocks shall contain the previous logical block
reference tag plus one.

- FOV (Format Options Valid) bit set to zero indicates that the Target should use its default settings for the
DPRY (0), DCRT (1), STPF (1), IP (0), and DSP (1) bits. These bits must all be set to zero in the Parameter
List Header when FOV=0, or the command will be terminated with Check Condition status, sense key of Illegal
Request, and additional sense code of Invalid Field in Parameter List. FOV=1 indicates that the values set in
DPRY, DCRT, STPF, IP, and DSP will be defined as specified below.

- DPRY (Disable Primary) bit set to zero indicates that the Target does not use portions of the medium identified
as defective in the primary defect Plist for Initiator addressable logical blocks. If the Target cannot locate the
Plist or it cannot determine whether a Plist exists, the Target terminates the FORMAT UNIT command as
described for STPF=1. A DPRY bit set to one indicates that the Target does not use the Plist to identify
defective areas of the medium. The Plist is not deleted. DPRY must be set to 0 when DCRT is set to 0.

- DCRT (Disable Certification) bit set to zero indicates that the Target performs a medium certification operation
and generates a Certification List (Clist), and adds the Clist to the Glist. DPRY must be set to 0 when DCRT is
set to 0. A DCRT bit of one indicates that the Target does not generate a Clist or perform a certification
process.

Note: Since the DCRT bit is part of the Data Out phase that follows the FORMAT command, the FCERT bit in
Mode Page 0 is provided to control certification when the FORMAT command is issued with no Data Out
phase. If a FORMAT command is issued with a Data Out phase then FCERT is ignored.

- STPF (Stop Format) bit must be set to one. If one or both of the following conditions occurs, the Target
terminates the FORMAT UNIT command with Check Condition status. The sense key is set to Medium Error
and the additional sense code is set to Defect List Not Found if the first condition occurred or to Defect List
Error if the second condition occurred.

- The Target cannot locate a required Dlist nor determine that the list exists.

HGST Hard Disk Drive Specification

75

- The Target encounters an unrecoverable error while accessing a required Dlist.

Byte

Bit

7 6 5 4 3 2 1

0

0

IP Modifier = 0

SI

Reserved = 0

1

Initialization Pattern Type = 0 or 1

2 - 3

Initialization Pattern Length (n-3)

4

Initialization Pattern

...

Initialization Pattern

...

n

- IP (Initialization Pattern) bit set to zero specifies that an initialization pattern descriptor is not included and all
customer data will be initialized to zeroes. An IP bit of one specifies that an Initialization Pattern Descriptor is
included in the FORMAT UNIT parameter list following the parameter list header.

Initialization Pattern

Table 63 Initialization Pattern Descriptor

- IP Modifier must be set to 0, indicating that the drive will not modify the initialization pattern.

- SI (Security Initialize) bit set to 1 specifies that all customer data sectors, including those that have been

previously reassigned, will be initialized. SI set to 0 specifies that only the current customer accessible sectors
will be formatted.

- Initialization Pattern Type

- Type of 0 will use a default initialization pattern.

- Type of 1 specifies that the Initialization Pattern specified shall be repeated as required to fill each logical

block.

- Initialization Pattern Length specifies the number of bytes that follow in the Initialization Pattern field, and
must be less than or equal to the current block size, and non-zero.

- If Initialization Pattern Type is 0 and the Initialization Pattern Length is not set to 0, Check Condition status
will be returned, with the sense key set to Illegal Request and the additional sense code set to Invalid Field in
Parameter List

- If Initialization Pattern Type is 1 and the Initialization Pattern Length is set to 0, Check Condition status will be
returned, with the sense key set to Illegal Request and the additional sense code set to Invalid Field in
Parameter List.

- DSP (Disable Saving Parameters) bit when 0 indicates the target is to save all the current MODE SELECT
savable parameters during the format operation. When the bit is 1, the target is not to save the current MODE
SELECT savable parameters.

- Immed (Immediate) bit set to 0 requests that status be returned at the end of the format operation. An
immediate bit set to 1 requests that status be returned immediately following CDB validation and transfer of
data in the Data Out phase. If the format operation, with the immediate bit set to 1, terminates in error,
DEFERRED ERROR SENSE data is generated.

- P_I_INFORMATION field shall be set to 0. For a type 1 protection information request, if the PROTECTION
INTERVAL EXPONENT field is not set to 0, then the device server shall terminate the command with CHECK
CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to
INVALID FIELD IN PARAMETER LIST.

- For a type 2 protection or a type 3 protection format request, the protection interval exponent determines the
length of user data to be sent before protection information is transferred (i.e., the protection information
interval). The protection information interval is calculated as follows: protection information interval = logical
block length ÷ 2(protection interval exponent) where: logical block length is the length in bytes of a logical
block as specified in the mode parameter block descriptor protection interval exponent is the contents of the
PROTECTION INTERVAL EXPONENT field.

- A protection interval exponent value of 3 is supported for 4096 byte logical blocks (512 bytes per protection
information interval). A protection interval exponent value of 0 is supported for all supported logical block
sizes. If these conditions are not met, then the device server shall terminate the command with CHECK

HGST Hard Disk Drive Specification

76

CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to

Byte

Bit

7 6 5 4 3 2 1

0

0 - 3

(MSB)

Defective Logical Block Address

(LSB)

4n
4n+1
4n+2
4n+3

(MSB)

Defective Logical Block Address n

(LSB)

INVALID FIELD IN PARAMETER LIST.

- Defect List Length field specifies the total length in bytes of the defect descriptors that follow (not including
the Initialization Pattern Descriptor, if any). Up to 1024 defect descriptors are allowed. The Defect List Length
must be equal to four times the number of defect descriptors for BLOCK format, or eight times the number of
defect descriptors for BYTES FROM INDEX and PHYSICAL SECTOR formats. Otherwise the command is
terminated with Check Condition status with the sense key set to Illegal Request and the additional sense code
set to Invalid Field in Parameter List.

Defect Descriptor

Three defect descriptor formats are supported. Entries are not required to be in ascending order. If an entry does
not correspond to a valid user addressable media location, the command terminates with Check Condition status
with the sense key set to Illegal Request and the additional sense code set to Invalid Field in Parameter List.

Block Format - 000b

Format of the Dlist sent during the data out phase when Dlist Format is Block format (000b) and FmtData is set to
one.

Table 64 Defect Descriptor - Block Format (for n + 1 defects)

The Block format of the Dlist is the LBA of each defective sector.

Note: If a Defective LBA entry, when converted to a physical sector, is equal to the physical sector of a Plist entry
and DPRY = 1, then the entry is not added to the Glist.

HGST Hard Disk Drive Specification

77

Bytes From Index Format - 100b

Byte

Bit

7 6 5 4 3 2 1

0

0 - 2

(MSB)

Cylinder Number of Defect

(LSB)

3

Head Number of Defect

4 - 7

(MSB)

Defect Bytes from Index

(LSB)

8n
8n + 1
8n + 2

(MSB)

Cylinder Number of Defect n

(LSB)

8n + 3

Head Number of Defect n

8n + 4
8n + 5
8n + 6
8n + 7

(MSB)

Defect (n) Bytes from Index

(LSB)

Byte

Bit

7 6 5 4 3 2 1

0

0
1
2

(MSB)

Cylinder Number of Defect

(LSB)

3

Head Number of Defect

4
5
6
7

(MSB)

Defect Sector Number

(LSB)

8n

8n + 1
8n + 2

(MSB)

Cylinder Number of Defect n

(LSB)

8n + 3

Head Number of Defect n

8n + 4
8n + 5
8n + 6
8n + 7

(MSB)

Defect (n) Sector Number

(LSB)

Format of the Dlist sent during the data out phase when Dlist Format is Bytes from Index format (100b) and
FmtData is set to one.

Table 65 Defect Descriptor - Bytes from Index Format (for n = 1 defects)

Each defect descriptor for the Bytes from Index format specifies that the sector containing this byte be marked
defective. The defect descriptor is comprised of the cylinder number of the defect, the head number of the defect,
and the number of the defect byte relative to index.

Note: If a Byte from Index entry, when converted to a physical sector, is equal to the physical sector of a Plist entry
and DPRY = 1, then the entry is not added to the Glist.

Physical Sector Format - 101b

Format of the Dlist sent during the data out phase when Dlist Format is Physical Sector format (101b) and FmtData
is set to one.

Table 66 Defect Descriptor - Physical Sector Format (for n + 1 defects)

HGST Hard Disk Drive Specification

78

Each defect descriptor for the Physical Sector format specifies a defective sector. The defect descriptor is
comprised of the cylinder number of the defect, the head number of the defect, and the defect’s sector number.

Note: If a Physical Sector entry, when converted to a physical sector, is equal to the physical sector of a Plist entry
and DPRY = 1, then the entry is not added to the Glist.

HGST Hard Disk Drive Specification

79

INQUIRY (12)

Byte

Bit

7 6 5 4 3 2 1 0 0

Operation Code = 12h

1

Reserved = 0

CmdDt =0

EVPD

2

Page Code

3 - 4

Allocation Length

5

VU = 0

Reserved = 0

FLAG

LINK

EVPD

PAGE

CODE

Description

0

0

The Target returns the standard INQUIRY data.

0

Non Zero

The drive returns Check Condition status with the sense key of Illegal Request and the
additional sense code of Invalid Field in CDB.

1

Non Zero

The drive returns the vital product data of page code requested.

Table 67 INQUIRY (12)

The INQUIRY command requests the parameters of the Target to be sent to the Initiator.
An EVPD bit of 1 specifies that the target return the vital product data page identified by the Page Code field in the
CDB the available VPD pages are defined in the addendum provided for each different drive model in the section
entitled Inquiry Data Format.
The Page Code specifies which page of vital product data information the drive shall return.

Table 68 Page Code descriptions

Allocation Length specifies the number of bytes that the Initiator has allocated for INQUIRY data to be returned.

An allocation length of zero implies that no data is to be returned. The Target will terminate the DATA IN phase
when all available INQUIRY data has been transferred or when allocation length bytes have been transferred,
whichever is less.

Note: If an INQUIRY command is received from an Initiator with a pending unit attention condition (before the target

reports Check Condition status), the Target processes the INQUIRY command. The unit attention condition is
not cleared by this action.

Note: The INQUIRY command is a Priority command and is not queued.
Note: The inquiry data is set at the time of manufacture and will not change, with the following exceptions:

- Product Revision Level (EVPD=0) can be changed when microcode is downloaded with the Write Buffer
command.

- The information returned for EVPD=1, Page Code = 3 is not fixed.

Note: The inquiry data returned when media is not available will not be complete.

Byte 0 of the returned data on an INQUIRY command is the same no matter which page(s) is (are) returned. This
description is to be used for all the following page definitions.
The Peripheral Qualifier field of zero (0) indicates that the peripheral device is currently connected to this logical
unit. A Peripheral Device Type field of zero (0) indicates that this device is a Direct Access Storage Device (DASD).

HGST Hard Disk Drive Specification

80

Inquiry Data

Byte

Bit

7 6 5 4 3 2 1 0 0

Qualifier = 0

Peripheral Device Type = 0

1

RMB = 0

Reserved=0

2

Version = 6

3

Obsolete

Obsolete

Norm ACA=0

HiSup = 1

Response Data Format = 2

4

Additional Length = 159 (9Fh)

5

SCCS=0

ACC=0

TPGS=00b

3PC=0

Reserved = 0

Protect=1

6

Obsolete

EncSer = 0

Port

MultiP=1

Obsolete

RSVD = 0

7

Obsolete

Obsolete

RSVD = 0

RSVD = 0

Obsolete

Obsolete

CmdQue= 1

RSVD = 0

8-15

Vendor ID = "HGST " (ASCII)

16-31

Product ID (ASCII)

32-35

Product Revision Level (ASCII)

36-43

Unit Serial Number (ASCII)

44-95

Reserved = 0

96-145

Copyright Notice (ASCII)

146-163

Reserved=0

1

Fields with a value shown inside quotes (e.g. Value =’xyz’) are character fields. A value not in quotes is a numeric
value. Character fields are alphanumeric and represented in either ASCII.

Inquiry Data Format - EVPD = 0, Page Code = 0

Table 69 Inquiry Data- EVPD = 0

- Qualifier is set to 0 to indicate that the LUN specified is currently supported. Qualifier is set to 011b when the

- Peripheral Device Type is set to 0 to indicate that the device is a Direct-Access Peripheral Device.

- Removal Media Bit (RMB) is always set to 0 to indicate no removal media exists.

- Version indicates the level of the ANSI standard that the product supports. The drive supports ANSI SPC-4.

- NormACA (Normal ACA) field of 0 indicates the device server does not support setting the NACA bit to 1 in the

- HiSup bit of 1 indicates that the drive uses the hierarchical addressing model to assign LUNs to logical units.

- Response Data Format is set to 2 to indicate that the INQUIRY Data Format as specified in the ANSI SCSI

- Additional Length indicates the number of bytes of INQUIRY information that follows.

LUN specified is not present1

Control Byte of the CDB as defined in the SAM.

version 2 is supported by the Target.

If an INVALID LUN is specified, a Check Condition status will be returned for all commands except INQUIRY and REQUEST

SENSE.

HGST Hard Disk Drive Specification

81

- SCCS bit of 0 indicates that the device does not contain an embedded storage array controller component.

- ACC bit of 0 indicates that no access controls coordinator may be addressed through this logical unit.

- TGPS field of 0 indicates that the device does not support asymmetric logical unit access.

- 3PC bit of 0 indicates that the device does not support third-party copy commands.

- Protect bit of 1 indicates that the drive supports protection information

- EncSer (Enclosure Services) bit of 0 indicates that the Target does not contain an embedded enclosure

services component.

- Port bit of 0 indicates that the drive received the Inquiry command on port A, while a Port bit of 1 indicates that
the drive received the Inquiry command on port B.

- MultiP (MultiPort) bit of 1 indicates that the Target has multiple ports and implements multi-port requirements.

- CmdQue is set to 1 to indicate that the drive supports command queuing.

- Vendor ID is HGST padded with ASCII blanks.

- Product ID is specified

- Product Revision Level indicates the level of microcode.

- Unit Serial Number contains the drive serial number.

HGST Hard Disk Drive Specification

82

Inquiry Data Format - EVPD = 1 - Page Code = 00h

Byte

Bit

7 6 5 4 3 2 1 0 0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 00h

2

Reserved = 0

3

Page Length = 0Fh

4

Supported Page Code - 00h

5

Supported Page Code - 03h

6

Supported Page Code - 80h

7

Supported Page Code - 83h

8

Supported Page Code = 86h

9

Supported Page Code = 87h

10

Supported Page Code = 88h

11

Supported Page Code – 8Ah

12

Supported Page Code – 90h

13

Supported Page Code – 91h

14

Supported Page Code – B0h

15

Supported Page Code – B1h

16

Supported Page Code – B2h

17

Supported Page Code – D1h

18

Supported Page Code – D2h

Table 70 Inquiry Data - EVPD = 1 (Page Code = 00h)

- Qualifier is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to 0, and this field contains the same value as in the page code field of the INQUIRY

command descriptor block.

- Page length specifies the length of the following page data.

- Supported Page Code field contains the Page Codes supported by the Target. The list is in ascending order.

HGST Hard Disk Drive Specification

83

Inquiry Data Format - EVPD = 1, Page Code - 03h

Byte

Bit

7 6 5 4 3 2 1 0 0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 03h

2

Reserved = 0

3

Page Length = 188 (BCh)

4

ASCII Fields Length = 00h

5-7

Reserved = 0

8-23

Reserved = 0

24-35

ASCII uCode Identifier

36-39

ASCII Servo P/N

40-41

Major Version

42-43

Minor Version

44-47

User Count

48-51

Build Number

52-83

Build Date String

84-91

Product ID

92-99

Interface ID

100-107

Code Type

108-119

User Name

120-135

Machine Name

136-167

Directory Name

168-171

Operating State

172-175

Functional Mode

176-179

Degraded Reason

180-183

Broken Reason

184-187

Code Mode

188-191

Flash Code Revision Level

Table 71 Inquiry Data - EVPD = 1 (Page Code = 03h)

- Qualifier is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to the value of the page code field in the CDB.

- Page Length field specifies the length (in bytes) of the vendor unique VPD information (bytes 4 - 163). If the

allocation length of the CDB is too small to transfer all the data, the Page Length field is not adjusted to reflect
the truncation.

- ASCII uCode Identifier contains the drive’s microcode identifier. The field is alphanumeric (ASCII), left aligned,
and the unused bytes are ASCII spaces (20h).

- ASCII Servo P/N contains the part number of the Servo microcode installed on the drive. This field is hex
numeric ASCII (i.e., the characters will be in the set 0...9, A...F).

- Major Version and Minor Version are version numbers of the code loaded on the drive.

- User Count is the number of times the code has been built since the master build.

- Build Number is the master build version number.

- Build Date String is the date the code on the drive was built, in an extended string format.

- Product ID is the name of the product this code is for.

- Interface ID is the interface type and serial interface speed (e.g. SAS 6Gbps or FCAL 4Gbps) of the code.

- Code Type is the intended use of the code. (e.g. local, released, test)

HGST Hard Disk Drive Specification

84

- User Name is the username of the person who built this version of the code.

0 = OM_BROKEN

We have detected a hardware failure.

1 = OM_DEGRADED

We have a soft failure; i.e., incomplete format. Motor is still spinning.

2 = OM_INACCESSIBL

Drive is good but motor is stopped.

3 = OM_STARTING

Motor is starting.

4 = OM_SPINNING

Motor is started but reserved area is not loaded yet.

5 = OM_NORMAL

Drive is spinning and ready to read/write.

6 = OM_POWERSAVE

Drive is ready but has entered power save mode.

7 = OM_STOPPED

Drive has come ready but now has been stopped.

8 = OM_NOTIFY

Drive is good but NOTIFY has not arrived (SAS)

10 = OM_WAKEUP

Similar to OM_STARTING, but LUN BECOMING READY during spinup is not
reported

11 = OM_NOTIFY_WAKEUP

Similar to OM_NOTIFY, but next transition is to OM_WAKEUP

0 = OM_NORMAL_MODE

Not in special or recovery mode.

1 = OM_SPECIAL_CMD

Special command mode on.

0 = OM_FLASH

Drive is running flash code

1 = OM_FLASH_OVERLAY

Drive is running flash overlay code

2 = OM_DISK

Drive is running code that has been loaded from disk

3 = OM_TRANSIENT

Drive is running code that has been downloaded but not saved

Byte

Bit

7 6 5 4 3 2 1

0 0 Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 80h

2

Reserved = 0

3

Page Length = 16 (10h)

- Machine Name is the workstation on which this version of the code was built.

- Directory Name is the last 32 characters of the directory from where this code was built.

- Operating State is the drive operating state. The least significant bit contains the following:

- Functional Mode is the drive functional mode. The least significant byte (0x0000000n) contains the following:

- Degraded Reason (UECType) is why the file is in a degraded mode; i.e., how to exit this mode.

- Broken Reason (UECType) is why the drive believes the hardware is broken.

- Code Mode is the type of code the drive is running. The least significant bit contains the following:

- Flash Code Revision Level is the revision level of the code in flash.

Inquiry Data Format - EVPD = 1, Page Code - 80h

Table 72 Inquiry Data - EVPD = 1 (Page Code = 80h)

- Qualifier is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to the value of the page code field in the CDB.

- Page Length is set to 16, and this field specifies the length of the following page data.

- Serial Number gives the drive serial number, right aligned.

HGST Hard Disk Drive Specification

85

Inquiry Data - EVPD = 1 (Page Code = 83h)

Byte

Bit

7 6 5 4 3 2 1 0 0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 83h

2

Reserved = 0

3

Page Length = 72 (48h)

4

Protocol Identifier = 0h

Code Set = 1

5

PIV=0

RSVD

Association=0

Identifier Type = 3

6

Reserved = 0

7

Identifier Length = 8

8-15

(MSB)

LUN (World Wide ID)

(LSB)

16

Protocol Identifier = 6h

Code Set = 1

17

PIV=1

RSVD

Association = 1

Identifier Type = 3

18

Reserved = 0

19

Identifier Length = 8

20-27

(MSB)

Target Port Identifier (World Wide ID)

(LSB)

28

Protocol Identifier = 6h

Code Set = 1

29

PIV=1

RSVD

Association = 1

Identifier Type = 4

30

Reserved = 0

31

Identifier Length = 4

32-35

(MSB)

Relative Port Identifier

(LSB)

36

Protocol Identifier = 6h

Code Set = 1

37

PIV=1

RSVD

Association = 2

Identifier Type = 3

38

Reserved = 0

39

Identifier Length = 8

40-47

(MSB)

Target Device Name Identifier (World Wide ID)

(LSB)

48

Protocol Identifier = 0h

Code Set = 3

49

PIV=0

RSVD

Association=2

Identifier Type = 8

50

Reserved = 0

51

Identifier Length =24 (18h)

52-55

"naa" (ASCII)

56-71

(MSB)

Target Device Name Identifier (World Wide ID) in ASCII

(LSB)

72-75

Reserved = 0

Table 73 Inquiry Data Format - EVPD = 1, (Page Code - 83h)

HGST Hard Disk Drive Specification

86

- Protocol Identifier is valid only when PIV=1. Protocol Identifier = 0 indicates Fibre Channel devices. Protocol
Identifier = 6 specifies SAS devices

- Code Set specifies the data type for the identifier field. Code Set = 1 indicates binary data, Code Set = 3
indicates ASCII.

- PIV (Protocol Identifier Valid) set to 0 indicates that the Protocol Identifier field should be ignored. PIV set to 1
indicates that the Protocol Identifier field contains a valid value.

- Association specifies the entity with which the Identifier field is associated: 0h for LUN, 1h for Target or Relative
Port, or 2h for Target Device.

- Identifier Type specifies the format and assignment authority for the identifier: 3h indicates NAA format of the
WWID for LUN, Target Port and Target Device; 4h indicates Relative Port; 8h indicates SCSI name string.

- Identifier fields contain the actual Identifier Descriptor:

- The LUN, Target Port and Target Device Name Identifiers are defined in the NAA IEE WWID format where:

- Worldwide ID is a 64-bit unique identification for each drive. The format is:5000CCAh xxxh yyb n where:

- xxx is the 12-bit block assignment defined for each model and manufacturing site

- n is the 22-bit drive unique serial number

- yy is the 2-bit port/node ID select

- The Relative Port Identifier indicates the port which received the Inquiry command:0000 0001h for the

Primary Port, or 0000 0002h for the Secondary Port.

HGST Hard Disk Drive Specification

87

Inquiry Data Format - EVPD = 1, Page Code - 86h

Byte

Bit

7 6 5 4 3 2 1 0 0

Peripheral Qualifier

Peripheral Device Type 1 Page Code = 86h

2-3

(MSB)

Page Length (003Ch)

(LSB)

4

Activate Microcode

SPT

GRD_CHK

APP_CHK

REF_CHK

5

Reserved

UASK_SUP

Group_Sup

Prior_Sup

HEADSUP

ORDSUP

SIMPSUP

6

Reserved

WU_SUP

CRD_SUP

NV_SUP

V_SUP

7

Reserved

P_I_I_SUP

Reserved

LUICLR 8 Reserved

R_SUP

Reserved

CBCS

9

Reserved

Multi I_T Nexus Microcode Download

10-11

(MSB) Extended Self-Test Completion Minutes(LSB)

12

POA_SUP

HRA_SUP

VSA_SUP

Reserved

13

Maximum Supported Sense Data Length

14-63

Reserved

Table 74 Inquiry Data Format - EVPD = 1, (Page Code - 86h)

- Activate Microcode field is set to 01b to indicate that the device server

1) activates the microcode before completion of the final command in the WRITE BUFFER sequence; and

2) establishes a unit attention condition for the initiator port associated with every I_T nexus, except the I_T

nexus on which the WRITE BUFFER command was received, with the additional sense code set to
MICROCODE HAS BEEN CHANGED.

- SPT (Supported Protection Type) field is set to 001b to indicate that the drive supports type 1 and type 2
protection.

- GRD_CHK (Guard Check) is set to 1 to indicate that the drive checks the Logical Block Guard Tag field in the
protection information, if any.

- APP_CHK (Application Tag Check) bit is set to 1 to indicate that the drive checks the Logical Block Application
Tag field in the protection information, if any.

- REF_CHK (Reference Tag Check) bit is set to 1 to indicate that the drive checks the Logical Block Reference
Tag field in the protection information, if any.

- UASK_SUP (Unit Attention Condition Sense Key Specific Data Supported) bit is set to 0 to indicate that the
device server does not return sense-key specific data for the UNIT ATTENTION sense key.

- GROUP_SUP (Group Supported) bit is set to 0 to indicate that the grouping function is not supported.

- PRIOR_SUP (Priority Supported) bit is set to 0 to indicate that task priority is not supported.

- HEADSUP (Head of Queue Supported), ORDSUP (Ordered Supported), and SIMPSUP (Simple Supported)

are set to 1 to indicate support for Head of Queue, Ordered and Simple task attributes.

- WU_SUP is set to 1 to indicate that setting the WR_UNCOR bit to 1 in the Write Long command is supported.

- CRD_SUP is set to 1 to indicate that setting the COR_DIS bit to 1 in the Write Long command is supported.

- NV_SUP (Non-volatile Supported) is set to 0 to indicate that non-volatile cache features are not supported.

- V_SUP (Volatile Supported) is set to 1 to indicated support of a volatile cache.

- P_I_I_SUP (Protection Information Interval Supported) bit is set to 0 to indicate that the logical unit does not

support protection information intervals.

- R_SUP (Referrals Supported) bit is set to 0 to indicate that the device server does not support referrals.

- POA_SUP (Power On Activation Supported) bit is set to 1 to indicate that the device server supports a WRITE

HGST Hard Disk Drive Specification

88

BUFFER command with the MODE field set to 0Dh and the PO_ACT bit set to 1.

Byte

Bit

7 6 5 4 3 2 1

0

0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 87h

2-3

Page Length = 0004h

4

Reserved=0

Policy Page Code = 3Fh

5

Policy Subpage Code = FFh

6

MILUS=1

Reserved = 0

Mode PagePolicy = 0

7

Reserved = 0

- HRA_SUP (Hard Reset Activation Supported) bit is set to 0 to indicate that the device server does not support
a WRITE BUFFER command with the MODE field set to 0Dh and the HR_ACT bit set to 1.

- VRA_SUP (Vendor Specific Activation Supported) bit is set to 0 to indicate that the device server does not
support a WRITE BUFFER command with the MODE field set to 0Dh and the VSE_ACT bit set to 1.

- Maximum Supported Sense Data Length field indicates the maximum length in bytes of sense data that the
device server is capable of returning in the same I_T_L_Q nexus transaction as the status.

Inquiry Data Format - EVPD = 1, Page Code - 87h

Table 75 Inquiry Data Format - EVPD = 1, (Page Code - 87h)

- Policy Page Code set to 3Fh and Policy Subpage Code set to FFh indicate that the descriptor applies to all

mode pages and subpages

- MILUS (Multiple Logical Units Share) set to 1 indicates the policy is shared by multiple logical units.

- Mode Page Policy set to 00b indicates that all mode pages and subpages are shared.

HGST Hard Disk Drive Specification

89

Inquiry Data Format - EVPD = 1, Page Code - 88h

Byte

Bit

7 6 5 4 3 2 1

0

0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 88h

2-3

Page Length = 48 (0030h)

4-5

Reserved=0

6-7

Primary Relative Port = 0001h

8-9

Reserved = 0

10-11

Initiator Port Transport ID Length = 0

12-13

Reserved = 0

14-15

Primary Target Port Descriptors Length = 0Ch

16

Protocol Identifier

Code Set = 1

17

PIV=1

RSVD

Association = 1

Identifier Type = 3

18

Reserved = 0

19

Identifier Length = 8

20-27

(MSB)

Primary Target Port Identifier (World Wide ID)

(LSB)

28-29

Reserved = 0

30-31

Secondary Relative Port = 0002h

32-33

Reserved = 0

34-35

Initiator Port Transport ID Length = 0

36-37

Reserved = 0

38-39

Secondary Target Port Descriptors Length = 0Ch

40

Protocol Identifier

Code Set = 1

41

PIV=1

RSVD

Association = 1

Identifier Type = 3

42

Reserved = 0

43

Identifier Length = 8

44-51

(MSB)

Secondary Target Port Identifier (World Wide ID)

(LSB)

Table 76 Inquiry Data Format - EVPD = 1, (Page Code - 88h)

- Protocol Identifier is valid only when PIV=1.Protocol Identifier = 0 indicates Fibre Channel devices. Protocol

- Code Set specifies the data type for the identifier field. Code Set = 1 indicates binary data

- PIV (Protocol Identifier Valid) set to 1 indicates that the Protocol Identifier field contains a valid value.

- Association specifies the entity with which the Identifier field is associated: 1h for Target or Relative Port.

- Identifier Type specifies the format and assignment authority for the identifier: 3h indicates NAA format of the

- Identifier fields contain the actual Identifier Descriptor.

- The Target Port Identifiers are defined in the NAA IEE WWID format where:
World Wide ID is a 64-bit unique identification for each drive. The format is: 5000CCAh
xxxh n yyb where xxx is the 12-bit block assignment defined for each model and manufacturing site, n is the 22-

Identifier = 6 indicates SAS devices

WWID for Target Port.

bit drive unique serial number, and yy is the 2-bit port/node ID

HGST Hard Disk Drive Specification

90

Inquiry Data Format - EVPD = 1, Page Code - 8Ah

Byte

Bit

7 6 5 4 3 2 1 0 0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 8Ah

2-3

Page Length = 14 (000Eh)

4

Reserved=0

STANDBY_Y

STANDBY_Z

5

Reserved=0

IDLE_C

IDLE_B

IDLE_A

6-7

Stopped Condition Recovery Time

8-9

Standby_Z Condition Recovery Time

10-11

Standby_Y Condition Recovery Time

12-13

Idle_A Condition Recovery Time

14-15

Idle_B Condition Recovery Time

16-17

Idle_C Condition Recovery Time

Table 77 Inquiry Data Format - EVPD = 1, (Page Code - 8Ah)

- Qualifier field is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to the value of the page code field in the CDB.

- Page Length is set to 14, and this field specifies the length of the following page data.

- If set to 1, a power condition support bit (STANDBY_Y, STANDBY_Z, IDLE_C, IDLE_B, IDLE_A) indicates that

the associated power condition may be entered with START STOP UNIT command and the associated power
condition may be entered with a power condition timer if the timer is supported and enabled.

- The recovery time fields indicate the time, in one millisecond increments, that the logical unit takes to transition
from the associated power condition to the active power condition. This time does not include the processing
time for the command that caused this transition to occur. A value of 0 indicates that the recovery time is not
specified. A value of FFFFh indicates that the recovery time is more than 65.534 seconds.

HGST Hard Disk Drive Specification

91

Inquiry Data - EVPD = 1, Page Code - 90h

Byte

Bit

7 6 5 4 3 2 1 0 0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 90h

2-3

Page Length = 24 (0018h)

4-15

Protocol-specific logical unit information descriptor 0.

16-27

Protocol-specific logical unit information descriptor 1.

1

Page Code = 90h

Byte

Bit

7 6 5 4 3 2 1

0

0-1

Relative Port Identifier

2

Reserved

Protocol Identifier = 6h

3-5

Reserved

6-7

Descriptor Length (0004h)

8

Reserved

TLR CONTROL

SUPPORTED = 0h

9-11

Reserved

Table 78 Inquiry Data - EVPD = 1 (Page Code = 90h)

- Qualifier field is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to the value of the page code field in the CDB.

- Page Length is set to 24, and this field specifies the length of the following page data.

- Protocol-specific logical unit information descriptor 0 field is defined in Table 79

- Protocol-specific logical unit information descriptor 1 field is defined in Table 79

Table 79 Protocol-specific logical unit information descriptor

- Relative Port Identifier is set to 1 for Port A (Primary Port) or 2 for Port B (Secondary Port).

- Protocol Identifier is set to 6 to specify that this is a SAS SSP Descriptor.

- TLR Control Supported field specifies support of the TLR CONTROL field in the SAS SSP frame header. This

field is set to 0 to indicate that the drive does not support Transport Layer Retries

HGST Hard Disk Drive Specification

92

Inquiry Data - EVPD = 1, Page Code - 91h

Byte

Bit

7 6 5 4 3 2 1

0

0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = 91h

2-3

Page Length = 24 (0018h)

4-15

Port Information Descriptor 0

16-27

Port Information Descriptor 1

Byte

Bit

7 6 5 4 3 2 1

0

0-1

Relative Port Identifier

2

Reserved

Protocol Identifier (6h)

3

Reserved

PWR_D_S

4-5

Reserved

6-7

Descriptor Length (0004h)

8-11

SAS PHY Information Descriptor 0

Byte

Bit

7 6 5 4 3 2 1

0

0

Reserved

1

PHY Identifier

3

Reserved

SSP Persistent

Capable

Table 80 Protocol Specific Port Information VPD page to SAS SSP

- Qualifier is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to the value of the page code field in the CDB.

- Page Length is set to 24, and this field specifies the length of the following page data.

Port Information Descriptor 0 is defined in Table 81
Port Information Descriptor 1 is defined in Table 81

Table 81 Port Information Descriptor for SAS SSP

- Relative Port Identifier is set to 1 for Port A (Primary Port) or 2 for Port B (Secondary Port).

- Protocol Identifier is set to 6 to specify that this is a SAS SSP Descriptor.

- PWR_D_S, Power Disable Supported, is set to 1 to specify that the POWER DISABLE signal is supported.

- SAS PHY Information Descriptor 0 is defined in Table 82 SAS PHY Information Descriptor for SAS SSP

Table 82 SAS PHY Information Descriptor for SAS SSP

- PHY Identifier is set to 0 for Port A (Primary Port) or 1 for Port B (Secondary Port).

- SSP Persistent Capable is set to 0 indicates that the PHY does not support persistent connections

HGST Hard Disk Drive Specification

93

Inquiry Data Format - EVPD = 1, Page Code - B0h

Byte

Bit

7

6 5 4 3 2 1 0

0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = B0h

2-3

Page Length = 60 (003Ch)

4

Reserved

WSNZ=0

5

Maximum Compare and Write Length = 0

6-7

Optimal Transfer Length Granularity = 0

8-11

Maximum Transfer Length = 0

12-15

Optimal Transfer Length = 0

16-19

Maximum Prefetch XDRead XDWrite Transfer Length = 0

20-23

Maximum Unmap LBA Count = 0

24-27

Maximum Unmap Block Descriptor Count = 0

28-31

Optimal Unmap Granularity = 0

32-35

UGAVALID=0

Unmap Granularity Alignment = 0

36-43

Maximum Write Same Length = 0

44-63

Reserved

Table 83 Inquiry Data - EVPD = 1 (Page Code = B0h)

- Qualifier: set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type: set to 0 to indicate that the device is Direct Access.

- Page Code: set to the value of the page code field in the CDB.

- Page Length: This field is set to 60 (3Ch), and specifies the length of the following page data.

- WSNZ - Write Same No Zero: set to 0 which indicates the device server supports a value of 0 in the NUMBER

OF LOGICAL BLOCKS field in the WRITE SAME command CDB.

- Maximum Compare and Write Length: set to 0 which indicates the device server does not support the
COMPARE AND WRITE command.

- Optimal Transfer Length Granularity: set to 0 to indicate that the device server does not report optimal
transfer length granularity.

- Maximum Transfer Length: set to 0 which indicates there is no reported limit on the maximum transfer length
in logical blocks that the device server accepts for a single request using any of the following supported media
access commands: PREFETCH, READ, VERIFY, WRITE, WRITE AND VERIFY.

- Optimal Transfer Length: set to 0 which indicates there is no reported value for the optimal transfer length in
logical blocks for any of the following supported media access commands: PREFETCH, READ, VERIFY,
WRITE, WRITE AND VERIFY.

- Maximum Prefetch XDRead XDWrite Transfer Length: indicates the maximum transfer length in logical
blocks that the device server accepts for a single PRE-FETCH command. It is set to 0 to be less than or equal to
the Maximum Transfer Length (above).

- Maximum Unmap LBA Count: set to 0000_0000h to indicate that the device server does not implement the
UNMAP command.

- Maximum Unmap Block Descriptor Count: set to 0000_0000h to indicate that the device server does not

HGST Hard Disk Drive Specification

94

implement the UNMAP command.

Byte

Bit

7 6 5 4 3 2 1

0

0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = B1h

2-3

Page Length = 60 (003Ch)

4-5

Medium Rotation Rate 7200 (1C20h)

6

Reserved

7

WABEREQ

WACEREQ

Nominal Form Factor = 2h

8-63

Reserved

- Optimal Unmap Granularity: set to 0000_0000h to indicate that the optimal unmap granularity is not specified.

- UGAVALID - Unmap Granularity Alignment VALID: set to 1 indicates that the UNMAP GRANULARITY

ALIGNMENT field is not valid.

- Unmap Granularity Alignment: set to 0 and is not valid.

- Maximum Write Same Length: set to 0 which indicates that there is no reported limit on the number of logical

blocks that may be requested for a single WRITE SAME command.

Inquiry Data Format - EVPD = 1, Page Code - B1h

Table 84 Inquiry Data - EVPD = 1 (Page Code = B1h)

- Qualifier field is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to the value of the page code field in the CDB.

- Page Length is set to 60, and this field specifies the length of the following page data.

- Medium Rotation Rate field is set to 7200.

- Nominal Form Factor field is set to 2h.

- WACEREQ If Crypto Erase is supported then set WACEREQ to 01b indicating.

HGST Hard Disk Drive Specification

95

Inquiry Data Format - EVPD = 1, Page Code - B2h

Byte

Bit

7 6 5

4 3 2

1

0

0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = B2h

2-3

Page Length = 4 (0004h)

4

Threshold Exponent = 0

5

LBPU=0

LBPWS= 0

LBPWS10=0

Reserved

LBPRZ=0

ANC_SUP=0

DP=0

6

Reserved

Provisioning Type = 0

7

Reserved

Byte

Bit

7 6 5 4 3 2 1

0

0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = D1h

2

Reserved = 0

3

Page Length = 80 (50h)

4-19

ASCII Media Disk Definition

20-35

ASCII Motor Serial Number

36-51

ASCII Flex Assembly Serial Number

52-67

ASCII Actuator Serial Number

68-83

ASCII Device Enclosure Serial Number

Table 85 Inquiry Data - EVPD = 1 (Page Code = B2h)

- Threshold Exponent: set to 0 which indicates that the logical unit does not support logical block provisioning

thresholds

- LBPU: set to 0 to indicate that the device does not support the UNMAP command.

- LBPWS: set to 0 to indicate that the device does not support the WRITE SAME(16) command to unmap LBAs.

- LBPWS10: set to 0 to indicate that the device does not support the WRITE SAME(10) command to unmap

LBAs.

- LBPRZ: set to 0 to indicate that, for an unmapped LBA specified by a read operation, the device server may
send user data with all bits set to any value to the Data-In Buffer

- ANC_SUP: set to 0 to indicate that the device does not support anchored LBAs.

- DP: set to 0 to indicate no Provisioning Group Descriptor is present

- Provisioning Type: set to 0 to indicate the logical unit is fully provisioned

Inquiry Data Format - EVPD = 1, Page Code - D1h

Table 86 Inquiry Data - EVPD = 1 (Page Code = D1h)

- Qualifier is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to the value of the page code field in the CDB.

- Page Length is set to 80, and this field specifies the length of the following page data.

Note: If the media is not available, bytes 0 through 3 are valid. All the other fields are ASCII blanks (20h).
Note: All ASCII fields are alphanumeric, left aligned, and padded on the right with ASCII blanks (20h).

HGST Hard Disk Drive Specification

96

Inquiry Data Format - EVPD = 1, Page Code - D2h

Byte

Bit

7 6 5 4 3 2 1

0

0

Qualifier = 0

Peripheral Device Type = 0

1

Page Code = D2h

2

Reserved = 0

3

Page Length = 52 (34h)

4

HDC Version Length = 16 (10h)

5 - 20

ASCII HDC Version

21

Card Serial Number Length = 16 (10h)

22 - 37

ASCII Card Serial Number

38

Card Assembly Part Number Length = 16 (10h)

Table 87 Inquiry Data - EVPD = 1 (Page Code = D2h)

- Qualifier is set to 0 to indicate that the LUN specified in the Command Block is currently supported.

- Peripheral Device Type is set to 0 to indicate that the device is Direct Access.

- Page Code is set to the value of the page code field in the CDB.

- Page Length is set to 52, and this field specifies the length of the following page data.

Note: If the media is not available, bytes 0 through 3 are valid. All the other fields are ASCII blanks (20h).
Note: All ASCII fields are alphanumeric, left aligned, and padded on the right with ASCII blanks (20h).

HGST Hard Disk Drive Specification

97

LOG SELECT (4C)

Byte

Bit

7 6 5 4 3 2 1 0 0

Command Code = 4Ch

1

Reserved = 0

Reserved = 0

PCR

SP 2 PC

Page Code

3

SubPage Code = 0

4-6

Reserved = 0

7

8

(MSB)

Parameter List Length = 0

(LSB)

9

Reserved = 0

FLAG

LINK

Table 88 Log Select (4C)

The LOG SELECT command provides a means for the Initiator to clear statistical information maintained by the
drive and reported via the LOG SENSE command.

- PCR The Parameter Code Reset determines whether the Log Sense parameters will be cleared and unit
attention posted for all other Initiators. A value of 1 indicates that the parameters be cleared, while a value of 0
(except when PC = 11b) indicates that the parameters not be cleared. Parameter list length must be 0 when
PCR is 1.The PC field is ignored for list parameters, i.e. when the Format and Linking (F&L) field contains 01b or
11b.

- SP The Save Parameters bit value of 0 indicates that the page parameters not be saved. A value of 1 indicates
that the page parameters that are savable be saved after they have been changed. SP bit MUST be 1 if
parameter list length is greater than 0. Otherwise it will result in a Check Condition status being returned. The
sense key shall be set to Illegal Request and additional sense code of Invalid Field in CDB.

- PC The Page Control field defines the type of parameters to be selected. The PC field set to 11b (and PCR is
then a don't care) indicates that the Default Cumulative values are set to their default values of 0. If the PC field
is set to 01b and PCR is set to 1, the Current Cumulative values are also set to their default values of 0.

Parameter List Length MUST be 0 when PC = 11b. Otherwise the command is terminated and a Check

Condition status is returned. The sense key shall be set to Illegal Request and additional sense code of Invalid
Field in CDB.

- Page Code field identifies which page is being selected. This field must be set to the values indicated in Page 0.
If the Page Code value is invalid a Check Condition status is returned with a sense key of Illegal Request and
additional sense code of Invalid Field in CDB.

• If page code field is set to 0, then the selection applies to all log parameters in all valid log pages.

• If page code field is set to a non zero, then the selection applies to all log parameters specified by this field.

- SubPage Code This field specifies the subpage to select. This field is not supported and must be set to 0.

- Parameter List Length The Parameter List Length field specifies the length in bytes of the parameter list that

shall be located in the DATA OUT buffer. A parameter list length 0 indicates that no pages shall be transferred.

• If the PARAMETER LIST LENGTH field is set to 0, then the PCR bit, the SP bit, and the PC fields apply to

the page (pages) addressed by the page code field.

• If the PARAMETER LIST LENGTH field is set to non zero, and the if PAGE CODE field is non-zero or the

SUBPAGE CODE field is non-zero, then the command shall be terminated with CHECK CONDITION status,
with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB.

HGST Hard Disk Drive Specification

98

Note: A specified length greater than 0x00FF will result in a Check Condition status being returned. A length that

results in log data being truncated will generate a Check Condition status.

Note: For page 0Fh, the maximum parameter list length supported is 4004h (4 bytes for the header and 100h bytes

for each of the 40h parameters that are supported). The Parameter List Length must be an integral of the
number of parameters plus the 4 byte header. (Ex: Parameter length =104h for one parameter, 204h for 2
parameters,... 4004h for all 40h parameters).

The drive allows updates to the current cumulative values only. A value of 0 is acceptable and is not considered an
error.
The drive updates only pages 0Eh, the Start/Stop Cycle page and 0Fh, the Application Client page. For other pages
the parameters are ignored. If the data out buffer contains multiple pages then the application client should send the
pages in ascending order. If the data out buffer contains multiple log parameters within a page, all log parameters
within the page should be sent and they should be sent in ascending order by parameter code value. The drive
shall return Check Condition status if the application client sends pages out of order, parameter codes out of order
or missing parameter code. The sense key shall be set to Illegal Request and additional sense code set to Invalid
Field in Parameter List. If one or more fields of the CDB are not set correctly the command will be terminated with a

Check Condition status. The sense key shall be set to Illegal Request and additional sense code of Invalid Field in
CDB. To indicate that parameters have changed, the Target generates a unit attention condition for all Initiators

except the one that issued the LOG SELECT command.
The following list contains all individual page parameters (counters) that are set to their default value of 0 by the
LOG SELECT command (when PCR=1).

- Page 02h parameters: (Counters for write errors)

- Write errors recovered without delay

- Write errors recovered with possible delays

- LBAs with write fault error

- Reserved=0

- Total errors recovered

- Number of times recovery invoked

- Total write byte count

- LBAs with hard error

- Page 03h parameters: (Counters for read errors)

- Read errors recovered without delay

- Read errors recovered with possible delays

- LBAs with LDPC detected error

- Reserved=0

- Total errors recovered

- Number of times recovery invoked

- Total read byte count

- LBAs with hard error.

- Page 05h parameters: (Counters for Verify Errors)

- Errors recovered without delay

- Errors recovered with possible delays

- LBAs with LDPC detected error

- Reserved=0

- Total errors recovered

- Number of times recovery invoked

- Total bytes verified

- LBAs with hard error.

- Page 06h parameters: (Counters for non medium errors, seek and other hardware type failures)

- Non-Medium Error Counter

- Page 15h parameters: (Background Medium Scan information)

- BMS Status parameter

- all Medium Scan parameters

- Page 18h parameters (SAS PHY Error counts - only cleared for the port which receives the Log Select)

- Invalid DWORD Count

- Running Disparity Error Count

- Loss of DWORD Synchronization Count

HGST Hard Disk Drive Specification

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- PHY Reset Problem Count

- Page 30h parameters:

- Zero Seeks counter

- Seeks > = to 2/3 counter

- Seeks > = 1/3 and < 2/3 counter

- Seeks > = 1/6 and < 1/3 counter

- Seeks > = 1/12 and < 1/6 counter

- Seeks > 0 and < 1/12 counter

- Overrun Counter

- Under run Counter

- Device Cache Full Read Hits

- Device Cache Partial Read Hits

- Device Cache Write Hits

- Device Cache Fast Writes

- Device Cache Misses on Reads

- Page 37h parameters:

- Media EXC

- Hardware EXC

- Total Read Commands

- Total Write Commands

HGST Hard Disk Drive Specification

100