Quantum LTO-2 SCSI User Manual

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LTO-2 SCSI Interface Guide, 50004524 Rev. A, September 2006, Made in USA.

Quantum Corporation provides this publication “as is” without warranty of any kind, either express or
implied, including but not limited to the implied warranties of merchantability or fitness for a particular
purpose. Quantum Corporation may revise this publication from time to time without notice.

COPYRIGHT STATEMENT

Copyright 2006 by Quantum Corporation. All rights reserved.

Your right to copy this document is limited by copyright law. Making copies or adaptations without prior
written authorization of Quantum Corporation is prohibited by law and constitutes a punishable violation of
the law.

TRADEMARK STATEMENT

Quantum, the Quantum logo, DLT, DLTtape, and the DLTtape logo are registered trademarks of Quantum
Corporation in the U.S. and other countries. LTO and Ultrium are trademarks of HP, IBM and Quantum in
the U.S. and other countries.

All other trademarks are the property of their respective companies.

Contents

Preface xix

Chapter 1 SCSI Interface 1

Overview.............................................................................................................1

ANSI Standards ..........................................................................................1

Cabling and Connectors ............................................................................ 2

General Features ......................................................................................... 2

Parallel SCSI Interface ....................................................................................... 2

General Features ......................................................................................... 2

Disconnect/Reconnect Function .............................................................. 3

SCSI Messages............................................................................................. 4

Inbound Messages ...................................................................................... 5

Outbound Messages................................................................................... 6

Extended Messages ....................................................................................8

Parity Errors................................................................................................. 9

Message Exception Handling ................................................................. 12

Standards Conformance.................................................................................. 15

LTO Conformance ........................................................................................... 17

General Behaviors............................................................................................ 17

Reset Condition......................................................................................... 17

Unit Attention Condition ........................................................................ 17

Contingent Allegiance Condition........................................................... 18

LTO-2 SCSI Interface Guide iii

Contents

Buffered Mode........................................................................................... 18

Immediate Commands............................................................................. 18

Residual Length Function........................................................................ 19

Early Warning Function........................................................................... 19

Error Reporting ......................................................................................... 19

Variable and Fixed Mode Recording ..................................................... 20

Library Features........................................................................................21

Chapter 2 SCSI Commands 24

Command Set ...................................................................................................24

Command Descriptor Blocks ......................................................................... 26

Command Descriptor Block Formats .................................................... 26

Operation Code Format ........................................................................... 28

Control Byte Format.................................................................................29

Command Status..............................................................................................30

ERASE Command............................................................................................ 32

Completion Status .................................................................................... 33

INQUIRY Command.......................................................................................36

Standard Inquiry Data Page.................................................................... 38

Supported Vital Product Data (VPD) Page (00h)................................. 42

Unit Serial Number Page (80h)............................................................... 44

Device Identification Page (83h).............................................................45

Drive Component Revision Levels Pages (C0h, C1h) ......................... 48

Drive Component Serial Number Page (C2, C3, C4, C5, C6h)........... 50

Drive Status Page (DFh)...........................................................................52

Drive State Field Values...........................................................................57

Cartridge Type Field Values ................................................................... 58

Command Support Data.......................................................................... 59

Completion Status .................................................................................... 61

LOAD UNLOAD Command..........................................................................62

Medium Position....................................................................................... 63

Medium Loadable Position ..................................................................... 64

Medium Auxiliary Memory Accessible Position................................. 65

Medium Loaded and Ready Position .................................................... 66

Completion Status .................................................................................... 67

LOCATE Command ........................................................................................69

Completion Status .................................................................................... 71

LOG SELECT Command ................................................................................ 73

Log Pages ................................................................................................... 75

Log Parameters .........................................................................................76

Parameter Control Byte............................................................................ 77

LTO-2 SCSI Interface Guide iv

Contents

Supported Log Pages ............................................................................... 78

Maximum Counts ..................................................................................... 79

Completion Status .................................................................................... 80

LOG SENSE Command................................................................................... 81

Page Control Field .................................................................................... 83

The Parameter Pointer Field.................................................................... 84

Supported Log Pages ............................................................................... 84

Log Page Format ....................................................................................... 85

Supported Log Pages Log Page (00h)....................................................88

Write Error Counters Log Page (02h) .................................................... 91

Read Error Counters Log Page (03h) ..................................................... 92

Sequential Access Device Log Page (0Ch) ............................................93

Device Statistics Log Page (14h) .............................................................94

Tape Diagnostic Data Log Page (16h).................................................... 96

Tape Alert Log Page (2Eh).....................................................................100

Tape Usage Log Page (30h) ................................................................... 111

Tape Capacity Log Page (31h) .............................................................. 112

Data Compression Log Page (32h)....................................................... 113

Error Events Log Page (33h).................................................................. 114

Completion Status ..................................................................................118

MODE SELECT Command ..........................................................................119

6-Byte Command Descriptor Block...................................................... 120

10-Byte Command Descriptor Block.................................................... 121

Parameter List ......................................................................................... 122

6-Byte Parameter Header....................................................................... 123

10-Byte Parameter Header.....................................................................124

Parameter List Block Descriptor........................................................... 126

Mode Parameter Pages .......................................................................... 127

Disconnect/Reconnect Mode Page (02h) ............................................128

Control Mode Page (0Ah)...................................................................... 130

Data Compression Control Mode Page (0Fh)..................................... 133

Sequential Access Device Configuration Mode Page (10h).............. 136

Informational Exceptions Mode Page (1Ch)....................................... 140

Drive Capabilities Control Mode Page (21h)...................................... 142

Interface Control Mode Page (22h) ......................................................145

Completion Status ..................................................................................150

MODE SENSE Command............................................................................. 151

6-Byte Command Descriptor Block...................................................... 151

10-Byte Command Descriptor Block.................................................... 153

Mode Sense Data Format....................................................................... 155

6-Byte Mode Parameter Header .......................................................... 156

10-Byte Mode Parameter Header .........................................................157

Block Descriptor...................................................................................... 159

LTO-2 SCSI Interface Guide v

Contents

Mode Parameter Pages .......................................................................... 160

Completion Status ..................................................................................161

PARK UNPARK Command......................................................................... 162

Completion Status ..................................................................................163

PREVENT ALLOW MEDIUM REMOVAL Command............................ 164

Completion Status ..................................................................................166

READ Command ...........................................................................................167

Command Operation .............................................................................170

End of Data (EOD).................................................................................. 170

Filemark (FM)..........................................................................................170

Transfer Length Satisfied ...................................................................... 171

End of Tape (EOT) or End-of-Partition (EOP) ................................... 171

Recoverable Data Error..........................................................................171

Unrecoverable Data Error ..................................................................... 171

Incorrect Length..................................................................................... 172

Fixed Mode Residual Data .................................................................... 173

Variable Mode Residual Data ............................................................... 174

Completion Status ..................................................................................175

READ BLOCK LIMITS Command ............................................................. 177

Returned Data ......................................................................................... 178

Completion Status ..................................................................................179

READ BUFFFER Command.........................................................................180

Read Buffer Header................................................................................182

Read Buffer Descriptor........................................................................... 183

Echo Buffer Descriptor........................................................................... 183

Echo Buffer...............................................................................................184

MAM Page Identification ......................................................................184

Completion Status ..................................................................................186

READ POSITION Command....................................................................... 187

Returned Data ......................................................................................... 189

Completion Status ..................................................................................193

RECEIVE DIAGNOSTIC RESULTS Command ........................................ 194

Returned Data ......................................................................................... 195

Completion Status ..................................................................................200

RELEASE UNIT Command.......................................................................... 201

6-Byte Command Descriptor Block...................................................... 201

10-Byte Command Descriptor Block.................................................... 202

Completion Status ..................................................................................204

REPORT DENSITY SUPPORT Command ................................................. 205

Returned Data ......................................................................................... 206

Report Density Support Data Block Descriptor ................................. 207

Completion Status ..................................................................................210

REPORT LUNS Command........................................................................... 211

LTO-2 SCSI Interface Guide vi

Contents

Returned Data ......................................................................................... 212

Completion Status ..................................................................................214

REQUEST SENSE Command....................................................................... 215

Sense Data Management........................................................................215

Returned Data ......................................................................................... 217

Sense Key Values ....................................................................................222

Additional Sense Codes and Code Qualifiers .................................... 231

Vendor Unique Message Codes ........................................................... 241

Completion Status ..................................................................................242

RESERVE UNIT Command.......................................................................... 243

Completion Status ..................................................................................246

REWIND Command......................................................................................247

Completion Status ..................................................................................249

SEND DIAGNOSTIC Command................................................................250

Diagnostic Pages ..................................................................................... 252

Completion Status ..................................................................................254

SET CAPACITY Command.......................................................................... 256

Completion Status ..................................................................................258

SPACE Command.......................................................................................... 260

Space-By-Count Functions .................................................................... 262

Space-to-EOD Function.......................................................................... 263

Completion Status ..................................................................................263

TEST UNIT READY Command................................................................... 265

Completion Status ..................................................................................266

VERIFY Command ........................................................................................ 268

Command Operation .............................................................................269

Completion Status ..................................................................................270

WRITE Command.......................................................................................... 272

Completion Status ..................................................................................274

WRITE BUFFER Command..........................................................................276

Soft Microcode Download..................................................................... 278

Hard Microcode Download .................................................................. 278

Echo Buffer...............................................................................................279

Write Buffer Data Header...................................................................... 279

Completion Status ..................................................................................280

WRITE FILEMARKS Command.................................................................. 281

Completion Status ..................................................................................282

LTO-2 SCSI Interface Guide vii

Contents

Appendix A Message Codes 284

Index 467

LTO-2 SCSI Interface Guide viii

Tables

Table 1 SCSI Message Codes................................................................................... 4

Table 2 Drive to Host SCSI Messages.................................................................... 5

Table 3 Host to Drive SCSI Messages.................................................................... 6

Table 4 Extended SCSI Messages ...........................................................................8

Table 5 Parity Error Cases ....................................................................................... 9

Table 6 IN Phase During Which ATN is Raised #1........................................... 12

Table 7 IN Phase During Which ATN is Raised #2........................................... 13

Table 8 Exception Actions and Action Codes .................................................... 14

Table 9 SCSI Command Set...................................................................................24

Table 10 SCSI 6-Byte Command Descriptor Block Data Format....................... 27

Table 11 SCSI 10-Byte Command Descriptor Block — Data Format ................ 27

Table 12 Command Descriptor Block — Field Descriptions.............................. 28

Table 13 Operation Code Format — Data Format............................................... 28

Table 14 Operation Code Format—Field Descriptions.......................................28

Table 15 Control Byte Format ................................................................................. 29

Table 16 Control Byte Format —Field Descriptions............................................ 29

Table 17 Status Byte Format....................................................................................30

LTO-2 SCSI Interface Guide ix

Tables

Table 18 Status Byte Field Descriptions ................................................................30

Table 19 Status Codes .............................................................................................. 31

Table 20 ERASE Command Descriptor Block — Data Format.......................... 32

Table 21 ERASE Command Descriptor Block — Field Descriptions................ 32

Table 22 ERASE Command Completion Status................................................... 34

Table 23 INQUIRY Command Descriptor Block — Data Format ..................... 36

Table 24 INQUIRY Command Descriptor Block — Field Descriptions ........... 36

Table 25 Standard Inquiry Data Page — Data Format........................................ 39

Table 26 Standard Inquiry Data Page — Field Descriptions.............................. 40

Table 27 Supported Vital Product Data Inquiry Page — Data Format ............ 42

Table 28 Supported Vital Product Data Inquiry Page —Field Descriptions ... 43

Table 29 Unit Serial Number Page (80h) — Data Format................................... 45

Table 30 Unit Serial Number Page (80h) —Field Descriptions.......................... 45

Table 31 Device Identification Page (83h) — Data Format................................. 46

Table 32 Device Identification Page (83h) — Field Descriptions....................... 46

Table 33 Identification Descriptor — Data Format.............................................. 47

Table 34 Identification Descriptor — Field Descriptions....................................47

Table 35 Drive Component Revision Levels Pages (C0h, C1h) — Data

Format ........................................................................................................ 48

Table 36 Drive Component Revision Levels Pages (C0h, C1h) — Field

Descriptions............................................................................................... 49

Table 37 Drive Component Serial Number Page (C2, C3, C4, C5, C6h)

— Data Format .......................................................................................... 50

Table 38 Drive Component Serial Number Page (C2, C3, C4, C5, C6h)

—Field Descriptions................................................................................. 50

Table 39 Drive Status Page (DFh) — Data Format .............................................. 52

Table 40 Drive Status Page (DFh) — Field Descriptions ....................................53

Table 41 Drive State Field Values........................................................................... 57

Table 42 Cartridge Type Field Values ...................................................................58

Table 43 Command Support Data — Data Format .............................................59

LTO-2 SCSI Interface Guide x

Tables

Table 44 Command Support Data — Field Descriptions ................................... 59

Table 45 INQUIRY Command Completion Status.............................................. 61

Table 46 LOAD UNLOAD Command Descriptor Block — Data Format........ 62

Table 47 LOAD UNLOAD Command Descriptor Block — Field

Descriptions............................................................................................... 62

Table 48 Medium Loadable Position ..................................................................... 64

Table 49 Medium Auxiliary Memory Accessible Position ................................. 65

Table 50 Medium Loaded and Ready Position .................................................... 66

Table 51 LOAD UNLOAD Command Completion Status.................................67

Table 52 LOCATE Command Descriptor Block — Data Format ......................69

Table 53 LOCATE Command Descriptor Block — Field Descriptions ............ 70

Table 54 LOCATE Command Completion Status ...............................................71

Table 55 LOG SELECT Command Descriptor Block — Data Format .............. 73

Table 56 LOG SELECT Command Descriptor Block — Field Descriptions .... 74

Table 57 Log Page Header — Data Format .......................................................... 75

Table 58 Log Page Header — Field Descriptions ................................................ 76

Table 59 Log Parameter — Data Format............................................................... 76

Table 60 Log Parameter — Field Descriptions.....................................................77

Table 61 Supported Log Pages ............................................................................... 78

Table 62 LOG SELECT Command Completion Status ....................................... 80

Table 63 LOG SENSE Command Descriptor Block — Data Format................. 81

Table 64 LOG SENSE Command Descriptor Block — Field Descriptions....... 82

Table 65 Supported Log Pages ............................................................................... 84

Table 66 Log Page Header — Data Format .......................................................... 85

Table 67 Log Page Header — Field Descriptions ................................................ 86

Table 68 Log Parameter — Data Format............................................................... 86

Table 69 Log Parameter — Field Descriptions.....................................................87

Table 70 Supported Log Pages Log Page (00h) — Data Format........................ 88

Table 71 Supported Log Pages Log Page (00h) — Field Descriptions.............. 89

LTO-2 SCSI Interface Guide xi

Tables

Table 72 Write Error Counters Log Page (02h) Page and Parameter

Descriptions............................................................................................... 91

Table 73 Read Error Counters Log Page (03h) Page and Parameter

Descriptions............................................................................................... 92

Table 74 Sequential Access Device Log Page (0Ch) Page and Parameter

Descriptions............................................................................................... 93

Table 75 Device Statistics Log Page (14h) Page and Parameter

Descriptions............................................................................................... 94

Table 76 Device Statistics Log Page (14h) Parameter Code................................ 95

Table 77 Tape Diagnostic Data Log Page (16h) — Page Descriptions.............. 96

Table 78 Tape Diagnostic Data Log Page (16h) Parameter Header .................. 97

Table 79 Tape Diagnostic Data Log Page (16h) Parameter Header — Field

Descriptions............................................................................................... 98

Table 80 Tape Alert Log Page (2Eh) Page Information..................................... 100

Table 81 Supported TapeAlert Flags ................................................................... 101

Table 82 Drive Conditions Setting/Clearing TapeAlert Flags ........................105

Table 83 Media Error to TapeAlert Correlation................................................. 108

Table 84 Table Heading Descriptions and Abbreviations................................ 110

Table 85 Tape Usage Log Page (30h) — Page and Parameter

Descriptions............................................................................................. 111

Table 86 Tape Capacity Log Page (31h) — Page and Parameter

Descriptions............................................................................................. 112

Table 87 Compression Log Page (32h) — Page and Parameter

Descriptions............................................................................................. 113

Table 88 Error Events Log Page (33h) — Page Description .............................114

Table 89 Error Events Log Page (33h) — Parameter Header — Data

Format ...................................................................................................... 115

Table 90 Error Events Log Page (33h) — Parameter Header — Field

Descriptions............................................................................................. 116

Table 91 LOG SENSE Command Completion Status........................................ 118

Table 92 MODE SELECT 6-Byte Command Descriptor Block — Data

Format ...................................................................................................... 120

Table 93 MODE SELECT 6-Byte Command Descriptor Block — Field

LTO-2 SCSI Interface Guide xii

Descriptions............................................................................................. 120

Table 94 MODE SELECT 10-Byte Command Descriptor Block — Data

Format ...................................................................................................... 121

Table 95 MODE SELECT 10-Byte Command Descriptor Block — Field

Descriptions............................................................................................. 122

Table 96 MODE SELECT 6-Byte CDB Mode Parameter Header — Data

Format ...................................................................................................... 123

Table 97 MODE SELECT 6-Byte CDB Mode Parameter Header — Field

Descriptions............................................................................................. 123

Table 98 MODE SELECT 10-Byte CDB Mode Parameter Header — Data

Format ...................................................................................................... 124

Table 99 MODE SELECT 10-Byte CDB Mode Parameter Header — Field

Descriptions............................................................................................. 125

Table 100 MODE SELECT Parameter List Block Descriptor — Data

Format ...................................................................................................... 126

Table 101 MODE SELECT Parameter List Block Descriptor — Field

Descriptions............................................................................................. 126

Tables

Table 102 Mode Parameter Pages ..........................................................................127

Table 103 Mode Parameter Page — Data Format................................................ 127

Table 104 Mode Parameter Page Field Descriptions........................................... 128

Table 105 Disconnect/Reconnect Mode Page (02h) — Data Format................ 129

Table 106 Disconnect/Reconnect Mode Page (02h) — Field Descriptions...... 130

Table 107 Control Mode Page (0Ah) — Data Format .........................................131

Table 108 Control Mode Page (0Ah) —Field Descriptions ................................ 131

Table 109 Data Compression Control Mode Page (0Fh) — Data Format ........ 133

Table 110 Data Compression Control Mode Page (0Fh) — Field

Descriptions............................................................................................. 134

Table 111 Sequential Access Device Configuration Mode Page (10h)

— Data Format ........................................................................................ 136

Table 112 Sequential Access Device Configuration Mode Page (10h)

— Field Descriptions .............................................................................. 137

Table 113 Informational Exceptions Mode Page (1Ch) — Data Format........... 140

Table 114 Informational Exceptions Mode Page (1Ch) —Field

LTO-2 SCSI Interface Guide xiii

Tables

Descriptions............................................................................................. 140

Table 115 Drive Capabilities Control Mode Page (21h) — Data Format.......... 143

Table 116 Drive Capabilities Control Mode Page (21h) — Field

Descriptions............................................................................................. 143

Table 117 Interface Control Mode Page (22h) — Data Format.......................... 146

Table 118 Interface Control Mode Page (22h) — Field Descriptions................ 147

Table 119 MODE SELECT Command Completion Status ................................. 150

Table 120 MODE SENSE Command 6-Byte Command Descriptor Block

— Data Format ........................................................................................ 151

Table 121 MODE SENSE Command 6-Byte Command Descriptor Block

— Field Descriptions .............................................................................. 152

Table 122 MODE SENSE Command 10-Byte Command Descriptor Block

— Data Format ........................................................................................ 153

Table 123 MODE SENSE Command 10-Byte Command Descriptor Block

— Field Descriptions .............................................................................. 154

Table 124 6-Byte CDB Mode Parameter Header — Data Format...................... 156

Table 125 6-Byte CDB Mode Parameter Header — Field Descriptions............ 156

Table 126 10-Byte CDB Mode Parameter Header — Data Format.................... 157

Table 127 10-Byte CDB Mode Parameter Header — Field Descriptions.......... 158

Table 128 Block Descriptor — Data Format.......................................................... 159

Table 129 Block Descriptor — Field Descriptions................................................ 159

Table 130 Mode Parameter Pages ..........................................................................160

Table 131 MODE SENSE Command Completion Status.................................... 161

Table 132 PARK UNPARK Command Descriptor Block — Data Format....... 162

Table 133 PARK UNPARK Command — Field Descriptions............................ 162

Table 134 PARK UNPARK Command Completion Status................................163

Table 135 PREVENT ALLOW MEDIUM REMOVAL Command

Descriptor Block — Data Format..........................................................164

Table 136 PREVENT ALLOW MEDIUM REMOVAL Command

Descriptor Block — Field Descriptions................................................ 165

Table 137 PREVENT ALLOW MEDIUM REMOVAL — Completion

Status ........................................................................................................ 166

LTO-2 SCSI Interface Guide xiv

Tables

Table 138 READ Command Descriptor Block — Data Format ......................... 168

Table 139 READ Command Descriptor Block — Field Descriptions ...............168

Table 140 READ Command —Completion Status .............................................. 175

Table 141 READ BLOCK LIMITS Command Descriptor Block — Data

Format ...................................................................................................... 177

Table 142 READ BLOCK LIMITS Command —Field Descriptions.................. 177

Table 143 READ BLOCK LIMITS Returned Data — Data Format ...................178

Table 144 READ BLOCK LIMITS Returned Data — Field Descriptions ......... 178

Table 145 READ BLOCK LIMITS Command Completion Status..................... 179

Table 146 READ BUFFER Command Descriptor Block — Data Format ......... 180

Table 147 READ BUFFER Command Descriptor Block — Field

Descriptions............................................................................................. 180

Table 148 READ BUFFER Header Descriptor — Data Format.......................... 182

Table 149 READ BUFFER Header Descriptor — Field Descriptions................ 182

Table 150 READ BUFFER Descriptor — Data Format........................................ 183

Table 151 READ BUFFER Descriptor — Field Descriptions.............................. 183

Table 152 Echo Buffer Descriptor — Data Format............................................... 183

Table 153 Echo Buffer Descriptor — Field Descriptions..................................... 184

Table 154 MAM Page Identification ......................................................................185

Table 155 READ BUFFER Completion Status......................................................186

Table 156 READ POSITION Command Descriptor Block —Data Format..... 187

Table 157 READ POSITION Command Descriptor Block —Field

Descriptions............................................................................................. 187

Table 158 Read Position Data — Long and TCLP Bits Set To 0 — Data

Format ...................................................................................................... 189

Table 159 READ POSITION Data — Long and TCLP Bits Set To 0

— Field Descriptions .............................................................................. 190

Table 160 READ POSITION Data — Long and TCLP Bits Set To 1

— Data Format ........................................................................................ 191

Table 161 READ POSITION Data — Long and TCLP Bits Set To 1

— Field Descriptions .............................................................................. 192

LTO-2 SCSI Interface Guide xv

Tables

Table 162 READ POSITION Completion Status.................................................. 193

Table 163 RECEIVE DIAGNISTOC RESULTS Command Descriptor

Block — Data Format ............................................................................. 194

Table 164 RECEIVE DIAGNISTOC RESULTS Command Descriptor

Block — Field Descriptions....................................................................194

Table 165 Returned Data Format If PCV Is Not Set ............................................196

Table 166 Field Descriptions If PCV Is Not Set....................................................196

Table 167 Returned Data If PCV Set ...................................................................... 197

Table 168 Returned Data If PCV Set, Page Code = 81h ...................................... 197

Table 169 Field Descriptions — PCV Not Set....................................................... 198

Table 170 RECEIVE DIAGNISTIC RESULTS Completion Status ..................... 200

Table 171 RELEASE UNIT 6-Byte Command Descriptor Block — Data

Format ...................................................................................................... 201

Table 172 RELEASE UNIT 6-Byte Command — Field Descriptions................ 202

Table 173 RELEASE UNIT 10-Byte Command Descriptor Block —

Data Format .............................................................................................202

Table 174 RELEASE UNIT 10-Byte Command — Field Descriptions.............. 203

Table 175 RELEASE UNIT COMMAND — Completion Status ....................... 204

Table 176 REPORT DENSITY SUPPORT Command Descriptor Block

— Data Format ........................................................................................ 205

Table 177 REPORT DENSITY SUPPORT Command Descriptor Block

— Field Descriptions .............................................................................. 205

Table 178 REPORT DENSITY SUPPORT Header — Data Format ...................206

Table 179 REPORT DENSITY SUPPORT Header — Field Descriptions ......... 206

Table 180 REPORT DENSITY SUPPORT Data Block Descriptor

— Data Format ........................................................................................ 207

Table 181 REPORT DENSITY SUPPORT Data Block Descriptor – Field

Descriptions............................................................................................. 208

Table 182 REPORT DENSITY SUPPORT Completion Status............................ 210

Table 183 REPORT LUNS Command Descriptor Block — Data Format......... 211

Table 184 REPORT LUNS Command Descriptor Block — Field

Descriptions............................................................................................. 212

LTO-2 SCSI Interface Guide xvi

Tables

Table 185 REPORT LUNS Header Data — Data Format....................................212

Table 186 REPORT LUNS Header Data — Field Descriptions.......................... 213

Table 187 REPORT LUNS Completion Status...................................................... 214

Table 188 REQUEST SENSE Command Descriptor Block — Data Format..... 216

Table 189 REQUEST SENSE Command Descriptor Block — Field

Descriptions............................................................................................. 216

Table 190 Returned Sense Data — Data Format..................................................217

Table 191 Returned Sense Data — Field Descriptions........................................ 218

Table 192 Sense Key Values ....................................................................................222

Table 193 Additional Sense Codes and Code Qualifiers .................................... 231

Table 194 REQUEST SENSE Command Completion Status.............................. 242

Table 195 RESERVE UNIT 6-Byte Command Descriptor Block — Data

Format ...................................................................................................... 243

Table 196 RESERVE UNIT 6-Byte Command Descriptor Block — Field

Descriptions............................................................................................. 244

Table 197 RESERVE UNIT 10-Byte Command Descriptor Block — Data

Format ...................................................................................................... 244

Table 198 RESERVE UNIT 10-Byte Command Descriptor Block — Field

Descriptions............................................................................................. 245

Table 199 RESERVE UNIT Completion Status..................................................... 246

Table 200 REWIND Command DesMcriptor Block — Data Format................ 247

Table 201 REWIND Command Descriptor Block — Field Descriptions.......... 248

Table 202 REWIND Command Completion Status.............................................249

Table 203 SEND DIAGNOSTIC Command Descriptor Block — Data

Format ...................................................................................................... 250

Table 204 SEND DIAGNOSTIC Command Descriptor Block — Field

Descriptions............................................................................................. 251

Table 205 Diagnostic Page Format.........................................................................252

Table 206 Supported Diagnostic Pages ................................................................. 252

Table 207 Memory Test Pattern Diagnostic Page — Data Format ....................253

Table 208 Memory Test Pattern Diagnostic Page — Field Descriptions .......... 253

LTO-2 SCSI Interface Guide xvii

Tables

Table 209 SEND DIAGNOSTIC Command Completion Status........................ 254

Table 210 SET CAPACITY Command Descriptor Block — Data Format........ 256

Table 211 SET CAPACITY Command Descriptor Block — Field

Descriptions............................................................................................. 257

Table 212 SET CAPACITY Command Completion Status................................. 258

Table 213 SPACE Command Descriptor Block — Data Format........................ 260

Table 214 SPACE Command Descriptor Block — Field Descriptions.............. 261

Table 215 SPACE Command Completion Status................................................. 263

Table 216 TEST UNIT READY Command Descriptor Block — Data

Format ...................................................................................................... 265

Table 217 TEST UNIT READY Command Descriptor Block Field

Descriptions............................................................................................. 266

Table 218 TEST UNIT READY Completion Status..............................................266

Table 219 VERIFY Command Descriptor Block — Data Format ...................... 268

Table 220 VERIFY Command Descriptor Block — Field Descriptions ............ 269

Table 221 VERIFY Command Completion Status ............................................... 270

Table 222 WRITE Command Descriptor Block — Data Format........................272

Table 223 WRITE Command Descriptor Block — Field Descriptions.............. 272

Table 224 WRITE Command Completion Status.................................................274

Table 225 WRITE BUFFER Command Descriptor Block — Data Format........ 276

Table 226 WRITE BUFFER Command Descriptor Block — Field

Descriptions............................................................................................. 276

Table 227 Write Buffer Data Header — Data Format ......................................... 279

Table 228 Write Buffer Data Header — Field Descriptions ............................... 279

Table 229 WRITE BUFFER Completion Status .................................................... 280

Table 230 WRITE FILEMARKS Command Descriptor Block — Data

Format ...................................................................................................... 281

Table 231 WRITE FILEMARKS Command Descriptor Block — Field

Descriptions............................................................................................. 281

Table 232 WRITE FILEMARKS Completion Status ............................................ 282

LTO-2 SCSI Interface Guide xviii

Preface

This document describes the SCSI interfaces for the LTO-2 tape drive.

Audience This guide is designed for use by software engineers who have a basic

understanding of SCSI principles and technology.

Purpose This manual describes the SCSI specifications for the LTO-2 tape drive.

For drive-specific installation and operational information, including
connector information, refer to the Installation Guide or Product Manual
for the specific model of your drive.

Document
Organization

LTO-2 SCSI Interface Guide xix

This guide is organized as follows:

• Chapter 1, SCSI Interface
relates to drive function.

• Chapter 2, SCSI Commands
manual along with their operation codes. It also describes the format
of Command Descriptor Blocks, Operation Codes, the Control Byte,
and the Status Byte. It describes in detail all the SCSI commands

discusses SCSI interface operation as it

, lists the SCSI Commands detailed in this

supported by the LTO-2 tape drive. Each command is described, its
Command Descriptor Block (CDB) is illustrated, and the Completion
Status is given.

• Appendix A, Message Codes

This guide concludes with an index.

Preface

Conventions Used
In This Manual

0

This manual uses the following conventions:

•Notes:

Note: Notes emphasize important information related to the

main topic.

• All binary numbers are succeeded by “b”

• All hexadecimal numbers are succeeded by “h”

• Error or attention conditions are represented in parenthesis that
translate as follows:

(SK=S ASC=AA ASCQ=QQ)

where:

S = hexadecimal sense key value
AA = hexadecimal additional sense code
QQ = hexadecimal additional sense code qualifier

LTO-2 SCSI Interface Guide xx

Preface

Related
Documents

Manuals associated withthe LTO-2 tape drive:

Document
Number Title Description

81-81382-01 LTO-2HH Tape

Drive User’s Guide

Provides specifications,
installation instructions,
and troubleshooting
information for the LTO­2HH tape drive.

81-81389-01 LTO-2HH Tape

Drive Installation
Guide

50001007 LTO-1/LTO-2 Tape

Drives User Guide

Provides installation
instructions for the LTO­2HH tape drive.

Provides specifications,
installation instructions,
and troubleshooting
information for the LTO-1
and LTO-2 tape drives.

6464215-01 Installing a DLT,

SDLT, VS, LTO, or
DAT Tape Drive Into
a Linux Operating

Provides instructions on
how to integrate specific
tape drives into a Linux
system.

System

Available on the
Downloads page
for LTO-2 tape
drives on

www.quantum.com

Install Guide
Addendum —
Manually Removing
an LTO Cartridge

Provides instructions on
how to manually remove
an LTO cartridge from a
Quantum tape drive.

SCSI-2 Specification

The SCSI-2 specification is the American National Standard for
information systems, dated March 9, 1990. Copies may be obtained from:

Global Engineering Documents
15 Inverness Way, East
Englewood, CO 80112
[phone] or [phone]

LTO-2 SCSI Interface Guide xxi

0

Contacts Quantum company contacts are listed below.

Preface

Quantum Corporate Headquarters

To order documentation on the LTO-2 or other products contact:

Quantum Corporation
P.O. Box 57100
Irvine, CA 92619-7100
[phone]
[phone]

Technical Publications

To comment on existing documentation send e-mail to:

[e-mail]

Quantum Home Page 0

Visit the Quantum home page at:

Visit the Quantum home page at:

http://www.quantum.com

0

0

Customer Support 0

The Quantum Customer Support Department provides a 24-hour help
desk that can be reached at:

North/South America: [phone] or [phone]
Asia/Pacific Rim:

APAC Headquarters: (International Code) + 65 6334 0660
Specific countries: www.quantum.com/ServiceandSupport/

ContactServiceandSupport/DLTSupportAPAC//
Index.aspx

Europe/Middle East/Africa: (International Code) + 44 1256 848 766

LTO-2 SCSI Interface Guide xxii

Send faxes for the Customer Support Department to:

North/South America: [phone]
Asia/Pacific Rim: (International Code) + 65 6432 2830
Europe/Middle East/Africa: (International Code) + 44 1256 848 777

Send e-mail for the Customer Support Department to:

North/South America: http://www.quantum.com/am/service_support/

Index.aspx

Asia/Pacific Rim: [e-mail]
Europe/Middle East/Africa: [e-mail]

Preface

LTO-2 SCSI Interface Guide xxiii

Preface

LTO-2 SCSI Interface Guide xxiv

Chapter 1

1SCSI Interface

Quantum LTO drives are designed for computer environments requiring
high performance, ultra-high capacity data storage. The drives are
available in 5.25-inch internal configurations or as an external subsystem.

Quantum LTO drives contain an embedded Small Computer Systems
Interface (SCSI) controller. The parallel SCSI drives provide synchronous
or asynchronous SCSI with high speed burst transfers of up to 160
megabytes/second. The internal drives are tailored for easy installation
in today's computers and the full-featured embedded controller facilitates
easy integration into a variety of systems.

This chapter discusses interface operation as it pertains to drive
functions.

Overview 1

ANSI Standards 1 SCSI is a set of standard interfaces established to support peripheral

equipment such as printers, tape drives, magnetic disks, optical disks for
microcomputers and other computer systems. The Parallel SCSI bus can
support up to sixteen devices consisting of any multiple of host adapters
and peripheral devices.

LTO-2 SCSI Interface Guide 1

Chapter 1 SCSI Interface

Parallel SCSI Interface

Quantum LTO drives comply with SCSI-2 and SCSI-3 specifications. In a
few cases, vendor unique features are available. These features are
compatible with the SCSI standards.

LTO drives support LUN 0 in stand-alone mode and can support LUN 1
when installed in a media changer (tape autoloader or library).

In addition to the information presented in this manual, we recommend
that you review the applicable SCSI-3 standards before writing host
software drivers. Also, see the conformance statements, which are given
in the Product Description Manual for each model of LTO drive.

Cabling and Connectors 1 The cabling requirements and pin assignments for the SCSI connector for

the internal drive models are given in the respective installation guide
and product manual for each model of LTO drive.

General Features 1 The LTO tape drive supports the following:

• Operation in both single and multi-initiator systems

• Fixed and variable block transfer lengths

• Space blocks, filemarks, and EOD

•

LOG SENSE and LOG SELECT for managing soft error reporting

• Multiple LUN support for command forwarding of LUN 1 command
to libraries

• Multiple Initiator support

Parallel SCSI Interface 1

General Features 1 The LTO tape drive supports the following:

• Integrated single-ended and low voltage differential SCSI
transceivers

• ST data transfers with parity protection running a max rate of
80Mbytes/sec

LTO-2 SCSI Interface Guide 2

Chapter 1 SCSI Interface

Parallel SCSI Interface

• DT data transfers with CRC protection running a max rate of
160Mbytes/sec

• 16 bit SCSI arbitration

• Disconnect/reconnect

•Hard reset

Disconnect/Reconnect Function

When the drive is performing a task not requiring communication with
the Initiator or when the tape drive determines that a relatively long time

1

has passed with no bus activity, it disconnects from the SCSI bus.
Examples are:

• When rewinding the tape.

• When writing to the tape and the buffer is full.

• When reading from the tape and the buffer is empty.

• When spacing, locating, or generally performing any tape motion
when data cannot be transferred on the SCSI bus.

During the time the Target is disconnected for one of these functions, the
bus is free for use by other devices. Both disconnect and reconnect are
initiated by the Target.

If the tape drive is selected while disconnected, it only allows the
following actions:

• If the command is from a different initiator or is from the same
initiator but to a different LUN, the tape drive accepts the command
and immediately disconnects if the command is a media-access
command. If the new command is a

TEST UNIT READY, then the new command is executed immediately.

REQUEST SENSE, INQUIRY or

• Immediately following the selection, the Initiator may send the
Identify, No Op, Abort, or Bus Device Reset messages to the drive.

• If the command is from the same initiator to the same LUN, the
current command terminates with a Check Condition and an Abort
Sense Key.

LTO-2 SCSI Interface Guide 3

Chapter 1 SCSI Interface

Parallel SCSI Interface

SCSI Messages 1 The SCSI message codes, descriptions, and directions are given in the

following table. Each of these SCSI messages are supported by the
Quantum LTO drive.

Table 1 SCSI Message
Codes

Code Description Direction

00h Command Complete In

01h Extended Message

b

a

In/Out

c

02h Save Data Pointer In

03h Restore Pointers In

04h Disconnect In

05h Initiator Detected Error Out

06h Abort Out

07h Message Reject In/Out

08h No Operation Out

09h Message Parity Error Out

0Ch Bus Device Reset Out

23h Ignore Wide Residue In

80h+ Identify In/Out

a. In = Drive to host.
b. Only three extended messages are supported: Parallel Protocol Request,
Synchronous Data Transfer Request, and Wide Data Transfer Request.
c. Out = Host to drive.

LTO-2 SCSI Interface Guide 4

Chapter 1 SCSI Interface

Parallel SCSI Interface

Inbound Messages 1 Table 2 lists drive-to-host SCSI messages and their definitions.

Table 2 Drive to Host SCSI
Messages

Hex

Message

Command
Complete

Code Definition

00h This message is sent by the drive at the end

of the status phase to indicate that a
command is complete. Once the message is
sent, the drive releases the bus and goes to
Bus Free

Disconnect 04h This message is sent by the drive to indicate

that it is about to disconnect from the bus
and go to Bus Free. During a Data phase, it
is always preceded by a Save Data Pointers
message. If a Message Reject message is
received in response to this message, then
the disconnect is prevented.

Extended

01h See Extended Messages

on page 8.

Message

Identify 80h+ An Identify in message is sent to the initiator

during reconnect to indicate which Logical
Unit is reconnecting. The Disconnect
Privilege and LUNTAR flags will both be
clear

Ignore Wide
Residue

23h This message is sent by the drive to the

initiator to indicate that a byte on a wide bus
is not valid. This will be supported
whenever a wide transfer is active.

Message
Reject

07h This message is sent to the initiator when the

message received by the drive is
unsupported or inappropriate.

LTO-2 SCSI Interface Guide 5

Message

Chapter 1 SCSI Interface

Parallel SCSI Interface

Hex

Code Definition

Restore
Pointers

03h This message causes the initiator to reset its

data transfer pointers to the values they held
when the last Save Data Pointers message
was sent. It will be sent when a parity error
is detected on the bus or when an Initiator
Detected Error message is received in order
to retry the data phase.

Save Data
Pointer

02h This message instructs the initiator to save

its current data transfer pointer for use with
a subsequent Restore pointers message. This
message will always be sent before a
Disconnect message during data phases.

Outbound Messages 1 Table 3 lists host-to-drive SCSI messages and their definitions.

Table 3 Host to Drive SCSI
Messages

Message

Hex

Code Definition

Abort 06h An abort condition is generated. See

Message Exception Handling

on page 12.

Bus Device
Reset

Extended

0Ch A reset condition is generated. See Message

Exception Handling on page 12.

01h See Extended Messages

on page 8.

Message

Identify 80h+ The Identify Out message is sent by the

initiator to identify the Logical Unit to be
accessed and to set Disconnect Privilege. The
LUNTAR flag must be zero.

The Identify Out message must be sent as the
first thing after selection. If it is sent at any
other time, the drive will respond with a
message reject message and go to Bus Free.

LTO-2 SCSI Interface Guide 6