Quantum DPM5500 User's Guide

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Quantum DX-Series Software Interface Guide, 81-81495-01 A01, November 2005, 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.

Your right to copy this manual 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

DLT, SDLT, DLTtape III, DLTtape IV and Super DLTtape I are all trademarks of Quantum Corporation. Other trademarks may be mentioned herein which belong to other companies.

Preface xxi

Chapter 1 Theory of Operation 1

Enhanced Data Protection Overview..............................................................1

SCSI-2 Implementation Philosophy ................................................................2

Medium Changer Elements.............................................................................. 2

Medium Transport Element...................................................................... 3

Storage Elements and Data Transfer ELements.....................................3

Events................................................................................................................... 5

Power Cycle................................................................................................. 5

DX-Series Unit On-Line Initialization Failure ........................................ 5

Operational Sequences......................................................................................6

Power-On ..................................................................................................... 6

On-Line Initialization................................................................................. 6

DX-Series Unit Inventory .......................................................................... 7

Off-Line ........................................................................................................8

Typical Application Enhancements ......................................................... 8

Chapter 2 Emulated Medium Changer SCSI Commands 9

Supported Operational Commands.............................................................. 11

Quantum DX-Series Software Interface Guide iii

Initialize Element Status (07h)........................................................................13

Initialize Element Status with Range (E7h) ..................................................14

Inquiry (12h)......................................................................................................16

Inquiry Command Data Format .............................................................16

Standard Inquiry Data Format................................................................17

Supported Vital Product Data Page .......................................................20

Log Sense (4Dh)................................................................................................26

Mode Select (15h) .............................................................................................32

Mode Sense (1Ah) ............................................................................................39

Move Medium (A5h) .......................................................................................50

Position To Element (2Bh)...............................................................................52

Read Element Status (B8h)..............................................................................54

Release (17h)......................................................................................................71

Report LUNS (A0h)..........................................................................................73

Request Sense (03h)..........................................................................................75

Request Volume Element Address (B5h)......................................................79

Reserve (16h).....................................................................................................95

Rezero Unit (01h)..............................................................................................99

Send Diagnostic (1Dh) ...................................................................................100

Send Volume Tag (B6h).................................................................................102

Test Unit Ready (00h) ....................................................................................105

Chapter 3 Emulated DLT7000 SCSI Commands 107

Overview of Command and Status Processing .........................................108

SCSI Pointers............................................................................................109

Reset Sequence.........................................................................................110

Status/Error Reporting ..........................................................................113

DATA-Phase Command Components.................................................115

Unit Attention Condition.......................................................................118

Behavior at Power-On and SCSI Bus Reset.........................................118

Data Cache and Tape Write Interaction...............................................119

SCSI Command Descriptions .......................................................................120

Erase (19h) .......................................................................................................122

Inquiry (12h)....................................................................................................124

Standard Inquiry Data Page ..................................................................126

Vendor Unique Inquiry Data ................................................................129

Supported Vital Product Data Page .....................................................132

Load Unload (1Bh) .........................................................................................142

Locate (2Bh).....................................................................................................147

Log Select (4Ch)..............................................................................................149

iv Quantum DX-Series Software Interface Guide

Log Detection Summary in LOG SELECT Command

Descriptor Block............................................................................... 152

Operation of LOG SELECT ................................................................... 152

Log Select Page Format..........................................................................153

Error Detection Summary in LOG SELECT Pages ............................157

Log Sense (4Dh).............................................................................................. 158

Error Detection Summary in LOG SENSE Command

Descriptor Block............................................................................... 161

Supported Pages Log Page (Page 00h) ................................................ 162

Read Error Counter Page (Page 03h) ................................................... 162

Last n Error Events Page (07h)..............................................................162

TapeAlert Page (2Eh) ............................................................................. 162

Read / Write Compression Page (32h)................................................ 166

Device Wellness Page (33h)................................................................... 171

Device Status Page (3Eh) ....................................................................... 171

Mode Select (6 /10) (15h / 55h) ................................................................... 172

Mode Parameter List .............................................................................. 174

READ / WRITE Error Recovery Page (01h) ....................................... 181

Disconnect/Reconnect Page (02h)........................................................ 183

Control Mode Page (0Ah)...................................................................... 185

Data Compression Page (0Fh)...............................................................188

Device Configuration Page (10h)..........................................................190

Medium Partition Page (11h)................................................................ 194

TapeAlert Page (1Ch) ............................................................................. 196

EEPROM Vendor Unique Page (3Eh).................................................. 200

Changeable Parameters within MODE SELECT................................ 200

Mode Sense (6/10) (1Ah / 5Ah) .................................................................. 202

MODE SENSE Data Headers ................................................................ 204

MODE SENSE Block Descriptor........................................................... 206

MODE SENSE Mode Pages................................................................... 209

Prevent / Allow Medium Removal (1Eh).................................................. 227

Read (08h) ....................................................................................................... 229

Read Block Limits (05h) ................................................................................ 232

Read Buffer (3Ch)........................................................................................... 234

Combined Header and Data Mode...................................................... 236

Data Mode................................................................................................237

Descriptor Mode ..................................................................................... 237

Read Position (34h)........................................................................................238

Receive Diagnostic Results (1Ch) ................................................................ 241

Release Unit (17h) .......................................................................................... 243

Media Changer Considerations............................................................ 244

Report LUNS (A0h) ....................................................................................... 245

Request Sense (03h) ....................................................................................... 247

Quantum DX-Series Software Interface Guide v

Reserve Unit (16h)..........................................................................................254

Rewind (01h) ...................................................................................................257

Send Diagnostic (1Dh) ...................................................................................258

Space (11h).......................................................................................................265

Test Unit Ready (00h) ....................................................................................268

Verify (13h)......................................................................................................269

Write (0Ah)......................................................................................................271

Exception Conditions .............................................................................272

Write Buffer (3Bh) ..........................................................................................274

Write Combined Header and Data Mode (000b)................................275

Write Data Mode (010b) .........................................................................275

Download Microcode Mode (100b)......................................................276

Download Microcode and Save Mode (101b).....................................276

Write Filemarks (10h) ....................................................................................277

Appendix A Sense Key Values 279

Appendix B Media Changer Sense Code Values 281

Appendix C DLT7000 Sense Code Values 289

Appendix D Fibre Channel Topology 297

Fibre Channel Topology.........................................................................297

Fibre Channel Addressing.....................................................................298

Appendix E DX-Series Software Deviations 301

Media Changer SCSI Command Deviations.......................................301

DLT 7000 SCSI Command Deviations .................................................306

Glossary 313

vi Quantum DX-Series Software Interface Guide

Index 317

Quantum DX-Series Software Interface Guide vii

viii Quantum DX-Series Software Interface Guide

Figures

Figure 1 Read Element Status Data General Structure......................... 57

Figure 2 Request Volume Element Address Data................................. 82

Figure 3 Fibre Channel Topologies ....................................................... 298

Quantum DX-Series Software Interface Guide ix

Figures

x Quantum DX-Series Software Interface Guide

Tables

Table 1 DX30 Storage Elements ...............................................................3

Table 2 DX100 Storage Elements .............................................................3

Table 3 DX3000 Storage Elements ........................................................... 4

Table 4 DX5000 Storage Elements ........................................................... 4

Table 5 SCSI-2 Terms.................................................................................9

Table 6 Supported Operational Commands ........................................ 11

Table 7 Initialize Element Status Command........................................ 13

Table 8 Initialize Element Status with Range Command................... 14

Table 9 Inquiry Command Data Format .............................................. 16

Table 10 Standard Inquiry Data............................................................... 17

Table 11 Supported Vital Product Data Page......................................... 20

Table 12 Unit Serial Number Page (Page 80h)....................................... 21

Table 13 Device Identification VPD Page 83h........................................ 22

Table 14 Identification Descriptor ...........................................................22

Table 15 Code Set....................................................................................... 23

Table 16 Association.................................................................................. 23

Table 17 Identifier Type ............................................................................ 24

Quantum DX-Series Software Interface Guide xi

Tables

Table 18 Device Identification VPD Logical Unit..................................24

Table 19 Device Identification VPD World Wide Name ......................25

Table 20 Log Sense Command..................................................................26

Table 21 Supported Log Page...................................................................28

Table 22 Medium Changer Statistics Page..............................................28

Table 23 Log Parameter.............................................................................29

Table 24 Supported Log Parameter Codes for 30h Page ......................30

Table 25 Mode Select Command..............................................................32

Table 26 Mode Select Data - Vendor Unique Page 20h.........................33

Table 27 Mode Select Data - Vendor Unique Page 00h.........................34

Table 28 Mode Select Data - Element Address Assign. Page...............35

Table 29 Changeable Parameters within MODE SELECT....................37

Table 30 Mode Sense Command..............................................................40

Table 31 Mode Sense Data Header ..........................................................41

Table 32 Mode Sense Data - Vendor Unique Page 00h.........................42

Table 33 Mode Sense Data - Element Address Assign. Page...............43

Table 34 Mode Sense Data - Trans. Geometry Para. Page....................46

Table 35 Mode Sense Data - Device Capabilities Data..........................47

Table 36 Mode Sense Data - Vendor Unique Page 20h.........................48

Table 37 Move Medium Command.........................................................50

Table 38 Position To Element Command................................................52

Table 39 Read Element Status Command...............................................54

Table 40 Read Element Status Data .........................................................58

Table 41 Element Status Page ...................................................................59

Table 42 Medium Transport Element Descriptor ..................................60

Table 43 Primary Volume Tag Information............................................62

Table 44 Storage Element Descriptor.......................................................62

Table 45 Import/Export Element Descriptor.........................................64

Table 46 Data Transfer Element Descriptor............................................67

xii Quantum DX-Series Software Interface Guide

Tables

Table 47 Alternate Volume Tag Information ......................................... 69

Table 48 Release Command...................................................................... 71

Table 49 Report LUNS Command........................................................... 73

Table 50 LUN Reporting Parameter List ................................................74

Table 51 Request Sense Command.......................................................... 75

Table 52 Request Sense Data .................................................................... 76

Table 53 Request Volume Element Address Command ...................... 79

Table 54 Volume Element Address Header ........................................... 83

Table 55 Element Status Page................................................................... 84

Table 56 Medium Transport Element Descriptor.................................. 85

Table 57 Primary Volume Tag Information ........................................... 87

Table 58 Alternate Volume Tag Information ......................................... 87

Table 59 Storage Element Descriptor ...................................................... 87

Table 60 Import/Export Element Descriptor......................................... 90

Table 61 Data Transfer Element Descriptor ........................................... 92

Table 62 Reserve Command.....................................................................96

Table 63 Element List Descriptor............................................................. 97

Table 64 Rezero Unit Command.............................................................. 99

Table 65 Send Diagnostic Command .................................................... 100

Table 66 Selftest Bit Definition............................................................... 101

Table 67 Send Volume Tag Command ................................................. 102

Table 68 Send Volume Tag Parameters ................................................ 103

Table 69 Test Unit Ready Command .................................................... 105

Table 70 Supported SCSI Commands...................................................108

Table 71 Command Descriptor Block Fields........................................ 110

Table 72 Command Descriptor Block - Field Descriptions................ 111

Table 73 Command Descriptor Block Control Field - Data Format . 112

Table 74 Command Descriptor Block Control Field -

Field Descriptions.....................................................................113

Quantum DX-Series Software Interface Guide xiii

Tables

Table 75 Status Codes ..............................................................................114

Table 76 DATA-Phase Command Contents.........................................116

Table 77 ERASE COMMAND Descriptor Block - Data Format ........122

Table 78 INQUIRY Command Descriptor Block - Data Format........124

Table 79 INQUIRY Command Descriptor Block -

Field Descriptions .....................................................................125

Table 80 Vital Product Data - Page Codes............................................126

Table 81 Inquiry Command (12h)..........................................................126

Table 82 Standard Inquiry Data Page - Field Descriptions ................127

Table 83 INQUIRY Vendor Unique Bytes Definitions........................129

Table 84 Vendor Unique Inquiry Data Page - Field Descriptions.....131

Table 85 Supported Vital Product Data Pages Page - Data Format ..133

Table 86 Unit Serial Number Page (80h) - Data Format .....................133

Table 87 Unit Serial Number Page - Field Descriptions ....................134

Table 88 Device Identification VPD Page 83h......................................134

Table 89 Identification Descriptor..........................................................135

Table 90 Code Set......................................................................................135

Table 91 Association.................................................................................136

Table 92 Identifier Type...........................................................................136

Table 93 Device Identification VPD Logical Unit................................137

Table 94 Device Identification VPD World Wide Name ....................137

Table 95 Firmware Build Information Page (C0h) - Data Format.....138

Table 96 Firmware Build Information Page (C0h) -

Field Descriptions .....................................................................138

Table 97 Subsystem Components Revision Page (C1h) -

Data Format ...............................................................................138

Table 98 Subsystem Components Revision Page -

Field Descriptions .....................................................................140

Table 99 LOAD UNLOAD Command Descriptor Block -

Data Format ...............................................................................144

xiv Quantum DX-Series Software Interface Guide

Tables

Table 100 LOAD UNLOAD Command Descriptor Block -

Field Descriptions.....................................................................144

Table 101 LOCATE Command Descriptor Block - Data Format......... 147

Table 102 LOCATE Command Descriptor Block -

Field Descriptions.....................................................................148

Table 103 LOG SELECT Command Descriptor Block - Data Format. 149

Table 104 LOG SELECT Command Descriptor Block -

Field Descriptions.....................................................................150

Table 105 LOG SELECT Log Page Header Format............................... 153

Table 106 LOG SELECT Log Page Header Field Descriptions............ 153

Table 107 LOG SELECT Log Parameters Format..................................154

Table 108 LOG SELECT Log Parameters Field Descriptions .............. 154

Table 109 LOG SENSE Command Descriptor Block - Data Format ... 158

Table 110 LOG SENSE Command Descriptor Block -

Field Descriptions.....................................................................159

Table 111 LOG SENSE Command Descriptor Block ............................ 160

Table 112 Supported Pages Page - Data Format.................................... 162

Table 113 TapeAlert LOG SENSE Header Format................................ 163

Table 114 TapeAlert LOG SENSE Header Field Descriptions............. 163

Table 115 TapeAlert Page Log Parameters Format...............................164

Table 116 TapeAlert Page Log Parameter Field Descriptions ............. 164

Table 117 TapeAlert Flags, Severity Levels, and Meanings................. 165

Table 118 Read / Write Compression Ratio LOG SENSE Header

Format........................................................................................ 166

Table 119 Read / Write Compression Ratio LOG SENSE Header

Field Descriptions.....................................................................167

Table 120 Log Parameters Format for Read / Write Compression Ratio

LOG SENSE Page (Parameter Codes 00h and 01h)............. 167

Table 121 Log Parameters for Read / Write Compression Ratio LOG

SENSE Page Field Descriptions (Parameter Codes 00h

and 01h) .....................................................................................168

Quantum DX-Series Software Interface Guide xv

Tables

Table 122 Log Parameters Format for Read / Write Compression Ratio

LOG SENSE Page (Parameter Codes 02h through 09h)......169

Table 123 Log Parameters for Read / Write Compression Ratio LOG

SENSE Page Field Descriptions (Parameter Codes 02h

through 09h) ..............................................................................170

Table 124 Mode Select (6) Command Descriptor Block -

Data Format ...............................................................................173

Table 125 Mode Select (10) Command Descriptor Block -

Data Format ...............................................................................173

Table 126 MODE SELECT (6)/(10) Command Descriptor Block -

Field Descriptions .....................................................................174

Table 127 MODE SELECT (6) Mode Parameter List - Data Format....174

Table 128 MODE SELECT (10) Mode Parameter List - Data Format..174

Table 129 MODE SELECT Mode Parameter List -

Field Descriptions .....................................................................175

Table 130 MODE SELECT (6) Mode Parameter Header -

Data Format ...............................................................................175

Table 131 MODE SELECT (10) Mode Parameter Header -

Data Format ...............................................................................176

Table 132 MODE SELECT Mode Parameter Header -

Field Descriptions .....................................................................177

Table 133 MODE SELECT Mode Parameter Block Descriptor -

Data Format ...............................................................................178

Table 134 MODE SELECT Mode Parameter Block Descriptor -

Field Descriptions .....................................................................178

Table 135 MODE SELECT Page Descriptor - Data Format ..................180

Table 136 MODE SELECT Page Descriptor - Field Descriptions ........ 181

Table 137 Error Recovery Page - Data Format .......................................181

Table 138 Error Recovery Page - Field Descriptions .............................182

Table 139 Disconnect / Reconnect Page - Data Format........................183

Table 140 Disconnect / Reconnect Page - Field Descriptions ..............184

Table 141 Control Mode Page Format Descriptor - Data Format........186

Table 142 Control Mode Page Descriptor - Field Descriptions............186

xvi Quantum DX-Series Software Interface Guide

Tables

Table 143 Data Compression Page Format Descriptor - Data Format188

Table 144 Data Compression Page Descriptor - Field Descriptions... 189

Table 145 Device Configuration Page - Data Format............................190

Table 146 Device Configuration Page - Field Descriptions..................192

Table 147 Medium Partition Page Format Descriptor - Data Format. 195

Table 148 Medium Partition Page Descriptor - Field Descriptions .... 195

Table 149 TapeAlert Page Format Descriptor - Data Format ..............196

Table 150 TapeAlert Page Format Descriptor - Field Descriptions .... 197

Table 151 Changeable Parameters within MODE SELECT .................200

Table 152 MODE SENSE (6) Command Descriptor Block -

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

Table 153 MODE SENSE (10) Command Descriptor Block -

Data Format...............................................................................203

Table 154 MODE SENSE Control Descriptor Block -

Field Descriptions.....................................................................203

Table 155 MODE SENSE (6) Data Header - Data Format ....................204

Table 156 MODE SENSE (10) Data Header - Data Format .................. 205

Table 157 MODE SENSE Data Header - Field Descriptions................ 205

Table 158 MODE SENSE Block Descriptor - Data Format................... 206

Table 159 MODE SENSE Block Descriptor - Field Descriptions......... 207

Table 160 MODE SENSE Page Descriptor - Data Format .................... 209

Table 161 MODE SENSE Page Descriptor - Field Descriptions .......... 210

Table 162 Read / Write Error Recovery Page - Data Format .............. 211

Table 163 Read / Write Error Recovery Page - Field Descriptions ....212

Table 164 Disconnect / Reconnect Page - Data Format........................ 213

Table 165 Disconnect / Reconnect Page - Field Descriptions.............. 214

Table 166 Control Mode Page - Data Format......................................... 215

Table 167 Control Mode Page - Field Descriptions............................... 216

Table 168 Data Compression Page - Data Format................................. 217

Table 169 Data Compression Page - Field Descriptions....................... 217

Quantum DX-Series Software Interface Guide xvii

Tables

Table 170 Device Configuration Page - Data Format............................219

Table 171 Device Configuration Page - Field Descriptions..................220

Table 172 Medium Partition Page - Data Format ..................................222

Table 173 Medium Partition Page - Field Descriptions ........................223

Table 174 TapeAlert Page Format Descriptor - Data Format...............224

Table 175 TapeAlert Page Format Descriptor - Field Descriptions.....224

Table 176 PREVENT / ALLOW MEDIUM REMOVAL Command

Descriptor Block - Data Format ..............................................227

Table 177 PREVENT / ALLOW MEDIUM REMOVAL Command

Descriptor Block - Field Descriptions ....................................228

Table 178 READ Command Descriptor Block - Data Format..............229

Table 179 READ Command Descriptor Block - Field Descriptions....230

Table 180 READ BLOCK LIMITS Command Descriptor Block -

Data Format ...............................................................................232

Table 181 READ BLOCK LIMITS Data - Data Format..........................232

Table 182 READ BLOCK LIMITS Data - Field Descriptions................233

Table 183 READ BUFFER Command Descriptor Block -

Data Format ...............................................................................234

Table 184 READ BUFFER Command Descriptor Block -

Field Descriptions .....................................................................235

Table 185 READ BUFFER Header - Data Format. .................................236

Table 186 READ BUFFER Header - Field Descriptions ........................237

Table 187 READ BUFFER Descriptor - Data Format.............................237

Table 188 READ POSITION Command Descriptor Block -

Data Format ...............................................................................238

Table 189 READ POSITION Command Descriptor Block -

Field Descriptions .....................................................................238

Table 190 READ POSITION - Data Format ............................................239

Table 191 READ POSITION Data - Field Descriptions.........................240

Table 192 RECEIVE DIAGNOSTIC RESULTS Command Descriptor

Block - Data Format..................................................................241

xviii Quantum DX-Series Software Interface Guide

Tables

Table 193 RECEIVE DIAGNOSTIC RESULTS Command Data -

Field Descriptions.....................................................................241

Table 194 RECEIVE DIAGNOSTIC RESULTS - Data Format............. 242

Table 195 RELEASE UNIT Command Descriptor Block -

Data Format...............................................................................243

Table 196 RELEASE UNIT Command Data - Field Descriptions ....... 243

Table 197 Report Luns Command ........................................................... 245

Table 198 LUN Reporting Parameter List .............................................. 246

Table 199 REQUEST SENSE Command Descriptor Block -

Data Format...............................................................................247

Table 200 REQUEST SENSE Command Data - Field Descriptions .... 247

Table 201 REQUEST SENSE - Data Format............................................ 248

Table 202 REQUEST SENSE Data - Field Descriptions........................ 249

Table 203 Supported Sense Keys ............................................................ 252

Table 204 RESERVE UNIT Command Descriptor Block -

Data Format...............................................................................254

Table 205 RESERVE UNIT Command Data - Field Descriptions ....... 254

Table 206 REWIND Command Descriptor Block - Data Format........ 257

Table 207 REWIND Command Data - Field Descriptions ................... 257

Table 208 SEND DIAGNOSTIC Command Descriptor Block -

Data Format...............................................................................258

Table 209 SEND DIAGNOSTIC Command Data -

Field Descriptions.....................................................................258

Table 210 SEND DIAGNOSTIC CDB Bits Selftst, DevOfl,

and UnitOfl................................................................................ 260

Table 211 SEND DIAGNOSTIC Parameter List - Data Format........... 261

Table 212 SEND DIAGNOSTIC Parameter List -

Field Descriptions.....................................................................262

Table 213 Sense Keys Used for SEND DIAGNOSTIC .......................... 264

Table 214 ASC / ASCQ for SEND DIAGNOSTIC ................................264

Table 215 SPACE Command Descriptor Block - Data Format............ 265

Table 216 SPACE Command Data - Field Descriptions ....................... 266

Quantum DX-Series Software Interface Guide xix

Tables

Table 217 TEST UNIT READY Command Descriptor Block -

Data Format ...............................................................................268

Table 218 VERIFY Command Descriptor Block - Data Format ...........269

Table 219 VERIFY Command Data - Field Descriptions ......................269

Table 220 WRITE Command Descriptor Block - Data Format ............271

Table 221 WRITE Command Data - Field Descriptions........................272

Table 222 WRITE BUFFER Command Descriptor Block -

Data Format ...............................................................................274

Table 223 WRITE BUFFER Command Data - Field Descriptions .......275

Table 224 WRITE FILEMARKS Command Descriptor Block -

Data Format ...............................................................................277

Table 225 WRITE FILEMARKS Command Data - Field Descriptions277

Table 226 Sense Data Values (Hexadecimal)..........................................279

Table 227 Sense Data Values (Hexadecimal ...........................................282

Table 228 DLT7000 Tape Drive Sense Data Values (Hexadecimal)....290

xx Quantum DX-Series Software Interface Guide

Preface

This guide describes the procedures and issues involved in the development of hierarchical mass storage software applications and utilities to communicate with the Quantum DX-Series enhanced data protection system and this includes the following models:

•DX30

•DX100

•DX3000

•DX5000

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

understanding of SCSI principles and technology.

Purpose This document provides information about DX-Series software including:

• Theory of operation

• Software interfaces for both the DX-Series system and the virtual DLT7000 tape drives

• Sense data values

Quantum DX-Series Software Interface Guide xxi

Preface

Document Organization

This guide is organized as follows:

• Chapter 1, “Theory of Operation,” explains medium changer elements, events, operational sequences, configuration, error recovery, system performance, and diagnostic support issues.

• Chapter 2, “Emulated Software Interfaces,” describes SCSI-2 terminology in relation to the DX-Series enhanced data protection system. This includes required and optional SCSI-2 messages, and operational commands.

• Chapter 3, “Emulated DLT7000 SCSI Commands,” describes SCSI terminology in relation to the DLT7000 tape drive. This includes required and optional SCSI-2 messages, and operational commands.

• Appendix A, Sense Key Values provides information on the supported sense keys for request sense.

• Appendix B, Media Changer Sense Code Values provides sense code values for the medium changer.

• Appendix C, DLT7000 Sense Code Values provides sense code values for the DLT7000 tape drive.

• Appendix D, Fibre Channel Topology provides an overview of Fibre Channel topology available with the DX30 and DX100 and as an option with DX3000 and DX5000.

• Appendix E, DX-Series Software Deviations provides an overview of the implemented changes to the DX-Series software.

• This guide concludes with a glossary and an index.

xxii Quantum DX-Series Software Interface Guide

Preface

Notational Conventions

This manual uses the following conventions:

Caution: Cautions indicate potential hazards to equipment and are

included to prevent damage to equipment. Cautions may advise you that failure to take or avoid an action could result in corrupt data or loss of data.

Note: Notes emphasize important information related to the main

topic.

Warning: Warnings indicate potential hazards to personal safety

and are included to prevent injury.

Tech Tip: Tech tips indicate an area that deviates from normal DLT

tape drive or changer behavior.

This manual uses the following:

• 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

Quantum DX-Series Software Interface Guide xxiii

Preface

1Theory of Operation

This chapter discusses these topics:

• SCSI-2 Implementation Philosophy

• Medium Changer Elements

• Events

• Operational Sequences

Chapter 1

Enhanced Data Protection Overview 1

The Quantum DX-Series system takes advantage of high speed hard drives to greatly reduce the time required for backup/restore functions and also improve confidence in completing the backup in the time allowed.

Quantum DX-Series Software Interface Guide 1

Chapter 1 Theory of Operation SCSI-2 Implementation Philosophy

SCSI-2 Implementation Philosophy 1

Using the SCSI-2 standard, the DX-Series system is designed so that the host can adapt to changes in the configuration. For example, the host can detect a change in the number of virtual tape drives configured in the DXSeries system.

The DX-Series system uses the SCSI-2 medium changer command set. This command set is complete and includes all primitive (elemental) commands required by a host to carry out any required complex operation.

The DX-Series system relies on the host computer to perform complex operations by issuing a sequence of elemental commands in the correct order. The DX-Series system does not execute operations that could result in damage to the device.

Medium Changer Elements 1

The medium changer command set accesses address space for the set of physical locations and mechanisms within the DX-Series system. This guide uses the SCSI-2 term element to refer to one member of the DXSeries system address space.

Each element is a discrete physical entity that can hold a single tape cartridge and is represented by a unique 16-bit element address.

The DX-Series system consists of these medium changer elements:

• Medium transport element

• Storage elements

• Data transfer elements

Issue the Mode Sense command to determine:

• DX-Series system configuration

•First address

• Number of elements of each type (medium transport, storage, or data transfer)

2 Quantum DX-Series Software Interface Guide

Chapter 1 Theory of Operation

Medium Changer Elements

Medium Transport Element

Storage Elements and Data Transfer ELements

Table 1 DX30 Storage Elements

The medium transport element consists of the following component:

• Virtual gripper

This mechanism can hold a single cartridge and is considered to be a single medium transport element. It moves media between elements within the DX-Series system.

The DX-Series system emulation is described in the following tables:

• DX30 Storage Elements

• DX100 Storage Elements

• DX3000 Storage Elements

• DX5000 Storage Elements

DX30 Storage Elements

Virtual tape drives 2 to 30

Virtual tape cartridges 2 to 160 per array (250GB drives),

320 per array(400 GB drives)

Table 2 DX100 Storage Elements

Number of arrays 1 to 4

Total number of virtual cartridges 640 (250GB drives), 1280 (400GB

drives)

DX100 Storage Elements

Virtual tape drives 2 to 55

Virtual tape cartridges 2 to 320 per array (250GB drives),

640 per array (400GB drives)

Quantum DX-Series Software Interface Guide 3

Chapter 1 Theory of Operation Medium Changer Elements

DX100 Storage Elements

Number of arrays 1 to 16

Total number of virtual cartridges 2560 (250GB drives), 5120 (400GB

drives)

Table 3 DX3000 Storage Elements

Table 4 DX5000 Storage Elements

DX3000 Storage Elements

Virtual tape drives 1 to 32

Virtual tape cartridges 1 to 80 per LUN

Number of RAID Sets 1 to 2

Total number of virtual cartridges 1 to 400 per LUN (800 max)

DX5000 Storage Elements

Virtual tape drives 1 to 64

Virtual tape cartridges 1 to 80 per LUN

Number of RAID Sets 1 to 4

Total number of virtual cartridges 1 to 400 per LUN (1600 max)

4 Quantum DX-Series Software Interface Guide

Chapter 1 Theory of Operation

Events

Events 1

Events are system conditions created by failures or operator actions, such as changing the DX-Series system state to offline. Some events appear as states on the control panel.

Events are recorded in sense data. Depending on the interface, the host

can obtain the sense data either in response to a Request Sense

command or as an unsolicited message.

The DX-Series system does not support asynchronous event notification. This simplifies the host/DX-Series interface and is acceptable because events happen infrequently and do not require an immediate host response.

DX-Series system events are queued. To check for DX-Series system

events, the SCSI host can issue a Request Sense command to the device.

This command causes the DX-Series system to return event sense data.

The host can issue a Request Sense command repeatedly to obtain

sense data for each queued event.

Power Cycle 1

DX-Series Unit OnLine Initialization Failure

The most significant events are detailed in this section:

• Power Cycle

• DX-Series Unit On-Line Initialization Failure

When the DX-Series system is powered on, it generates a Power On/ Reset Occurred event (SK=6 ASC=29 ASCQ=00).

When a DX-Series system is placed on-line and initialization fails, the DXSeries system generates an event for the error condition that caused the failure.

Quantum DX-Series Software Interface Guide 5

Chapter 1 Theory of Operation Operational Sequences

Operational Sequences 1

Operational sequences are listed in order of precedence. These operational sequences are detailed in this section:

•Power On

• System Stopped

• On-Line Initialization

• DX-Series System Unit Inventory

• Off-Line

Power-On 1

On-Line Initialization

When the DX-Series system is powered-on it goes through an initialization sequence, during which:

• System goes through power sequencing and intitialization

• DX-Series system responds to these commands:

• Inquiry

• Request Sense

•Log Sense

• Mode Sense

• All other commands return a Logical Unit is Not Ready check

condition (SK=2 ASC=04 ASCQ=00)

When the power-on initialization is complete:

1 DX-Series system generates a Power On/Reset Occurred event

(SK=6 ASC=29 ASCQ=00).

2 System performs additional operational sequences, depending on the

condition of the system.

To start the on-line initialization sequence:

1 Power on the DX-Series system.

During the on-line initialization sequence:

6 Quantum DX-Series Software Interface Guide

Chapter 1 Theory of Operation

Operational Sequences

• Browser indicates that the DX-Series system is performing the on-line initialization sequence

• DX-Series system responds to these commands:

• Inquiry

• Request Sense

•Log Sense

• Mode Sense

• All other commands return a Logical Unit is Not Ready check condition (SK=2 ASC=04 ASCQ=00)

• DX-Series system performs an inventory of its elements

• When initialization completes, the web based GUI changes to System On-Line and the DX-Series system is fully operational

DX-Series Unit Inventory

The DX-Series system inventories its storage elements after power up,

upon receipt of an Initialize Element Status command, or after the door

is closed and the DX-Series system is placed on-line.

• The local controller for the DX-Series system checks the state of the medium transport element (gripper)

• If there is a virtual tape cartridge in the medium transport element, the inventory cannot be performed

• If this is the case and the inventory was requested by the host,

then a check condition is set, and Transfer Full (SK=5 ASC=80

ASCQ=01) sense data is sent

• If the inventory was not requested by the host, the DX-Series

system generates a Transfer Full (SK=5 ASC=80 ASCQ=01) on-

line initialization failure event

• Each element of the DX-Series system is inventoried if it is the first

inventory made since power-on or issuing an Initialize Element Status command

• An inventory is attempted for each virtual tape drive present

• The results of the inventory are returned with the Read Element Status command.

Quantum DX-Series Software Interface Guide 7

Chapter 1 Theory of Operation Operational Sequences

Off-Line 1

Changing the DX-Series system status to Off-line through the web GUI

causes the DX-Series system to go off-line. When a DX-Series system is placed off-line, this sequence is performed:

1 The local controller for the DX-Series system completes any currently

processing command.

2 When all commands are complete, the web GUI displays System

Off-Line.

3 The DX-Series system generates a Unit Standby Button Was

Pressed event (SK=6 ASC=80 ASCQ=09).

When the DX-Series system is off-line it responds to these commands:

• Inquiry

• Request Sense

•Log Sense

•Mode Sense

• Check condition is set for all other commands and Unit Is Turned Off-Line (SK=2 ASC=80 ASCQ=09) is set in the sense data

The DX-Series system remains off-line until one of the other operational sequences occur.

Typical Application Enhancements

For optimum system performance, please note:

• Direct the host to check for any attention or error conditions the tape

DX-Series system may have buffered by issuing Request Sense

commands until “no sense data available” exists.

• The internal software does not support command queueing. It is up to the host application to queue commands to the unit. It may be advantageous for the application to group queued commands to require the least amount of actuator motion.

8 Quantum DX-Series Software Interface Guide

Chapter 2

2Emulated Medium Changer

SCSI Commands

This chapter describes the specific Small Computer Systems Interface (SCSI-2) terminology in relation to the DX-Series system. SCSI-2 terms and their equivalent DX-Series terms.

Table 5 lists the

Table 5 SCSI-2 Terms

SCSI-2 Term Equivalent DX-Series Term

Logical Unit DX-Series system

Initiator Host computer

Data Transfer Element Virtual tape drive

Medium Transport Element Virtual gripper mechanism

Storage Element Storage bin

DX-Series system:

• Is a SCSI-2 medium changer devices - the host computer serves as the SCSI initiator and issues commands to the DX-Series system and tape drives, which act as SCSI targets

• SCSI target support - does not perform any initiator functions (each DX-Series system has its own SCSI address separate from any other SCSI devices, including the tape drives)

Quantum DX-Series Software Interface Guide 9

Chapter 2 Emulated Medium Changer SCSI Commands

• Support asynchronous SCSI

• Is intended for use with:

• iSCSI 10, 100, 1000Mbit/sec. initiators for DX3000 and DX5000

• Fully support RFC 3720 with error handling level 0

• 1 or 2 Gb/s initiators for Fibre Channel initiators for DX30 and DX100 (optional on DX3000 and DX5000)

• Does not support:

• SCSI queuing or linked commands - all element addresses must be specified absolutely; no relative addressing is permitted

• Change Definition command

• Asynchronous event notification

• Extended contingent allegiance

• Overlapped command support - if this command is received from the same host, the DX-Series system aborts the previous

command and returns a check condition with Overlapped Commands Attempted sense data code (SK=5 ASC=54

ASCQ=00)

10 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Supported Operational Commands

Supported Operational Commands 2

The DX-Series system supports all commands that the SCSI-2 specification indicates are required by all devices.

Table 6 Supported Operational Commands

Command Name OperCode Type

Initialize Element Status 07h Optional

Initialize Element Status with Range E7h Vendor

Inquiry 12h Mandatory

Log Sense 4Dh Optional

Mode Select 15h Optional

Mode Sense 1Ah Optional

Move Medium A5h Mandatory

Position to Element 2Bh Optional

Prevent/Allow Medium Removal 1Eh Optional

Read Element Status B8h Optional

Read Buffer 3Ch Optional

Release 17h Optional

Request Sense 03h Mandatory

Request Volume Element Address B5h Optional

Reserve 16h Optional

Rezero Unit 01h Optional

Send Diagnostic 1Dh Mandatory

Send Volume Tag B6h Optional

Quantum DX-Series Software Interface Guide 11

Chapter 2 Emulated Medium Changer SCSI Commands Supported Operational Commands

Command Name OperCode Type

Test Unit Ready 00h Mandatory

Write Buffer 3Bh Optional

12 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Initialize Element Status (07h)

Initialize Element Status (07h) 2

This command allows the host to request an inventory of the tape cartridges held in a DX-Series system. The inventory reads each tape’s bar code. Inventory information is returned to the host, only if requested,

using the Read Element Status command.

The DX-Series system does not accept any other commands from the host during the inventory process.

The host can issue an Abort of the inventory for the DX-Series system. If another Initialize Element Status command is then issued, the inventory

process is restarted from the beginning.

The format for this command data block is shown in table 3.

Table 7 Initialize Element Status Command

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number Reserved (00h)

NBL Reserved (00h)

Operation Code (07h)

Reserved (00h)

• Logical Unit Number

The Logical Unit Number must be set to 0. Field indicates the logical

unit to which the command is sent.

• NBL

•A No Bar Code Labels value of 1 specifies the inventory to not

scan the bar codes of the elements and set the corresponding primary volume tags to empty

• A value of 0 specifies element bar code labels are to be scanned and placed in the primary volume tags

Quantum DX-Series Software Interface Guide 13

Chapter 2 Emulated Medium Changer SCSI Commands Initialize Element Status with Range (E7h)

Initialize Element Status with Range (E7h) 2

The Initialize Element Status with Range command allows the host to

request an inventory of a range of elements in the DX-Series system. The DX-Series system conducts the inventory and determines if each element within the range contains a tape cartridge. The inventory reads each tape’s bar code (unless commanded not to).

The DX-Series system does not accept any other commands from the host during the inventory process.

The host can issue an Abort of the inventory for the DX-Series system. If another Initialize Element Status command is then issued, the inventory

process is restarted from the beginning.

The format for this command data block is shown in table 8.

Table 8 Initialize Element Status with Range Command

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number Reserved (00h) Range

(MSB)

NBL Reserved (00h)

Operation Code (E7h)

Starting Element Address

Reserved (00h)

Number of Elements

Reserved (00h)

• Logical Unit Number

The Logical Unit Number must be set to 0. Field indicates the logical

unit to which the command is sent.

(LSB)

14 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Initialize Element Status with Range (E7h)

•Range

• Range value of 1 specifies performing the inventory over the range specified by the Starting Element Address and Number of Elements fields

• A value of 0 specifies performing the inventory on all elements in

the DX-Series system, ignoring the Starting Element Address and Number of Elements fields

• Starting Element Address and Number of Elements

• These fields select the range of elements to be inventoried and are

only valid when Range value is 1

• The inventory range begins with the first element with an

address greater than or equal to the Starting Element Address,

and includes all defined elements until the indicated number of elements have been inventoried or the last element is reached

• NBL

•A No Bar Code Labels value of 1 specifies the inventory to not

scan the bar codes of the elements and set the corresponding primary volume tags to empty.

• A value of 0 specifies element bar code labels are to be scanned and placed in the primary volume tags.

Quantum DX-Series Software Interface Guide 15

Chapter 2 Emulated Medium Changer SCSI Commands Inquiry (12h)

Inquiry (12h) 2

The host uses the Inquiry command to determine devices attached to the

SCSI bus and request a description from each device.

Inquiry Command Data Format

Table 9 Inquiry Command Data Format

The description provided by the DX-Series system identifies the device type, manufacturer, and nature of the SCSI interface. The format for this

command data block is shown in

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number Reserved (0h) EVPD

table 9.

Operation Code (12h)

Page Code

Reserved (00h)

Allocation Length

Reserved (00h)

• Logical Unit Number

The Logical Unit Number must be set to 0. Field indicates the logical

unit to which the command is sent.

• EVPD

• When the Enable Vital Product Data (EVPD) bit is set to 0, only Standard Inquiry Data is returned

• When the bit is set to 1, the target returns the optional vital

product data specified by Page Code field (see

• Allocation Length

Field contains the maximum data amount that the DX-Series system may return.

16 Quantum DX-Series Software Interface Guide

table 11)

Chapter 2 Emulated Medium Changer SCSI Commands

• Page Code

The Page Code (Byte 2 in table 9) specifies which page of vital

product data information the target shall return.

The supported Page Code is (80h) to return the Serial Number Page (see

table 11).

Inquiry (12h)

Standard Inquiry Data Format

Table 10 Standard Inquiry Data

The format for the Standard Inquiry Data block returned by the DX-Series system to the initiator is shown in

Bit/Byte 7 6 5 4 3 2 1 0

Peripheral Qualifier (0) Peripheral Device Type (8)

RMB (1) Device-Type Modifier (00h)

ISO Version (0) ECMA Version (0)

AENC

(0)

TrmIOP

(0)

RelAdr

(MSB)

(0)

WBus32

(0)

WBus16

8 - 15

table 10.

ANSI-Approved Version

(2)

Reserved (0) Response Data Format (02h)

Additional Length (1Fh)

Reserved (0000h)

S y n c

(0)

Linked

(0)

Vendor ID

(0)

Rsvrd

(0)

CmdQue

(0)

SftRes

(0)

(LSB)

16 - 31

32 - 35

(MSB)

Product ID

(MSB)

Product Revision Level

Quantum DX-Series Software Interface Guide 17

(LSB)

Chapter 2 Emulated Medium Changer SCSI Commands Inquiry (12h)

• Peripheral Qualifier

• 0 indicates the specified DX-Series system is currently connected

• 3 indicates the specified DX-Series system cannot be supported

• Peripheral Device Type

• 08h indicates medium changer device

• 1Fh indicates unknown or no device type used in conjunction

with Peripheral Qualifier

•RMB A Removable Medium Bit of 1 indicates medium is removable.

• Device-Type Modifier

This field is not supported and should return a value of 0.

• ISO and ECMA Version

0 code value indicates target does not claim compliance to ISO version of SCSI (ISO IS 9316) or ECMA version of SCSI (ECMA-111).

• ANSI-Approved Version

2 indicates the device complies with the SCSI-2 specification.

•AENC

The asynchronous event notification capability bit of 0 indicates the device does not support asynchronous event notification capability.

• TrmIOP

A terminate I/O process value of 0 indicates the device does not

support the TERMINATE I/O PROCESS message.

• Response Data Format

2 indicates data must be in format specified in SCSI-2 spec.

• Additional Length

The length (in bytes) of additional inquiry data available.

•RelAdr

A Relative Address of 0 indicates the device does not support

relative addressing for this DX-Series system.

•WBus32

0 bit value - DX-Series system does not support 32-bit wide transfers.

18 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Inquiry (12h)

•WBus16

1 bit value indicates the DX-Series system supports 16-bit wide transfers.

•Sync

Synchronous transfer value of 0 indicates the device does not support synchronous data transfer.

•Linked

Linked command value of 0 indicates the device does not support linked commands for this DX-Series system.

•CMDQue

Command queuing value of 0 indicates the device does not support tagged command queuing for this DX-Series system.

•SftRes

• A soft reset bit of 0 indicates the device responds to the RESET condition with a hard reset

• A soft reset bit of 1 indicates the device responds to the RESET condition with a soft reset

• Vendor ID

The vendor ID string is selectable. The default inquiry string is P1000 and the alternate inquiry string is DX30 or DX100.

For the P1000 inquiry - this field contains the string ATLbbbbb.

For the DX30 inquiry - this field contains the string QUANTUMb

For the DX100 inquiry - this field contains the string QUANTUMb

For the DX3000 inquiry - this field contains the string QUANTUMb

For the DX5000 inquiry - this field contains the string QUANTUMb

Quantum DX-Series Software Interface Guide 19

Chapter 2 Emulated Medium Changer SCSI Commands Inquiry (12h)

•Product ID

The product ID is selectable. The default product ID is P1000 and the alternate product ID are DX30 and DX100.

For the P1000 inquiry - P1000bbbb6220050

For the DX30 inquiry - DX30bbbbb6220050

For the DX100 inquiry - DX100bbbb6220050

For the DX3000 inquiry - DX3000bbb6532501

For the DX5000 inquiry - DX5000bbb6532502

Note: In the ASCII strings above, each b represents a space (20h)

and 6220050 represents the DX30 and DX100 system part number. 6532501 represents the DX3000 system part number. 6532502 represents the DX5000 system part number.

• Product Revision Level

Both the P1000, DX30, DX100, DX3000, and DX5000 firmware revision level are in the format xxxx.

Supported Vital Product Data Page

The supported vital product data pages page provides a directory of the vital product data pages that are supported. The pages that are supported

are:

• Unit Serial Number Page (80h)

• Device Identification VPD page (Page 83h)

Table 11 Supported Vital Product Data Page

20 Quantum DX-Series Software Interface Guide

Bit/Byte 7 6 5 4 3 2 1 0

Peripheral Qualifier

Page Code (00h)

Reserved

Page length (3)

Peripheral device type

Chapter 2 Emulated Medium Changer SCSI Commands

Inquiry (12h)

Bit/Byte76543210

Table 12 Unit Serial Number Page (Page 80h)

83h - Device Identification Page

00h - (this page)

80h - Unit Serial Number Page

Unit Serial Number Page (80h) 2

The Unit Serial Number Page (Byte 2 in table 9) specifies which page of

vital product data information the target shall return.

The supported Page Code is (80h) to return the Serial Number Page

(see

table 12).

Bit/Byte 7 6 5 4 3 2 1 0

Peripheral Qualifier

Page Code (80h)

Reserved (00h)

Page length (n-3) (size of the product serial number)

Peripheral device type

4-n

Product serial number (up to 12 bytes)

Device Identification VPD page (Page 83h) 2

The device identification VPD page provides the means to retrieve identification descriptors applying to the logical unit. Logical units may have more than one identification descriptor (e.g. if several types of associations of identifier are supported.

Device identifiers shall be assigned to the peripheral device and not to the currently mounted media, in the case of removable media devices.

Quantum DX-Series Software Interface Guide 21

Chapter 2 Emulated Medium Changer SCSI Commands Inquiry (12h)

Table 13 Device Identification VPD Page 83h

Bit/Byte 7 6 5 4 3 2 1 0

Peripheral Qualifier (0) Peripheral Device Type (8)

Page Code (83h)

Reserved (00h)

Page Length (n-3)

Identification Descriptor list

Identification descriptor (first)

. . .

Identification descriptor (last)

• Identification Descriptor

Each identification descriptor (see table 14) contains information identifying the logical unit, physical device, or access path used by the command and returned parameter data. The association field indicates the entity that the identification descriptor describes. If a physical or logical device returns the identification descriptor with the association field set to 0h, it shall return the same descriptor when it is accessed through any other path.

Table 14 Identification Descriptor

22 Quantum DX-Series Software Interface Guide

Bit/Byte 7 6 5 4 3 2 1 0

Reserved

Association Identifier Type

Reserved

Code Set

Chapter 2 Emulated Medium Changer SCSI Commands

Inquiry (12h)

Bit/Byte 7 6 5 4 3 2 1 0

Table 15 Code Set

(MSB)

Identifier length (n-3)

Identifier

(LSB)

•Code set

The code set field specifies the code set used for the identifier field, as described in

table 15. This field is intended to be an aid to software that

displays the identifier field.

Value Description

0h Reserved

1h The identifier field shall contain binary values

2h The identifier field shall contain ASCII graphic codes (e.g.

code values 20h through 7Eh)

3h-Fh Reserved

Table 16 Association

• Association

The association field specifies the entity with which the identifier field is associated, as described in

table 16.

Value Description

0h The identifier field is associated with the addressed

physical or logical device

1h The identifier field is associated with the port that received

the request

2h - 3h Reserved

Quantum DX-Series Software Interface Guide 23

Chapter 2 Emulated Medium Changer SCSI Commands Inquiry (12h)

• Identifier Type.

The identifier type is described in table 17

Table 17 Identifier Type

Table 18 Device Identification VPD Logical Unit

Value Description

00h Reserved

1h Vendor ID followed by the product identification field from

the standard inquiry data and the serial number field from the Serial Number Inquiry Page.

2h Canonical form of the IEEE Extended Unique Identifier, 64

bit (EIU-64)

3h FC-PH Name_Identifier

4h to fh Reserved

Bit/Byte 7 6 5 4 3 2 1 0

Protocol Identifier (0) Code Set (2)

Rsvd (0)

Association (0) Identifier Type (1)

Reserved (0)

4-n

24 Quantum DX-Series Software Interface Guide

MSB

Vendor and Product ID Serial Number

Identifier Length (n-3)

LSB

Chapter 2 Emulated Medium Changer SCSI Commands

Inquiry (12h)

Table 19 Device Identification VPD World Wide Name

Bit/Byte 7 6 5 4 3 2 1 0

4-11

Protocol Identifier (0) Code Set (1)

Rsvd (0)

MSB

Association (0) Identifier Type (2)

Reserved (0)

Identifier Length (8)

IEEE extended Unique Identifier

LSB

Quantum DX-Series Software Interface Guide 25

Chapter 2 Emulated Medium Changer SCSI Commands Log Sense (4Dh)

Log Sense (4Dh) 2

The Log Sense command (see table 20) retrieves statistical information

maintained by the logical unit. Data is returned from the logical unit in

the Medium Changer Statistics Page (see

table 22).

Table 20 Log Sense Command

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number Reserved (0) PPC(0) SP(0)

PC (1) Page Code

(MSB)

Operation Code (4Dh)

Reserved (0000h)

Parameter Pointer

(LSB)

Allocation Length

(LSB)

Reserved (00h)

26 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Log Sense (4Dh)

• Logical Unit Number Logical Unit Number must be set to 0. Field indicates the logical unit

to which the command is sent.

• PPC Parameter Pointer Control field is not supported and must be set to

•SP Save Parameters field is not supported and must be set to 0.

•PC Page Control field defines type of parameter values to be selected.

Only cumulative values are supported, therefore this field must be set to 1.

• Page Codes

Currently, there are 3 supported page codes:

• 00h — Supported Log Page (see table 21).

• 30h — Medium Changer Statistic Page (see table 22).

• 3Fh — Return all supported pages. This is a composite of all

pages, returned sequentially. Order is Supported Log Page followed by Medium Changer Statistic Page.

• Parameter Pointer

Field allows host to request parameter data beginning from a specific parameter code to the maximum allocation length or the maximum parameter code supported by the target, whichever is less. For parameter codes, see

table 24.

• Allocation Length

Field specifies how much memory host has set aside to store log sense information returned by the DX-Series system.

• Supported Log Page

Page returns the list of log pages supported (see table 21).

Quantum DX-Series Software Interface Guide 27

Chapter 2 Emulated Medium Changer SCSI Commands Log Sense (4Dh)

Table 21 Supported Log Page

Bit/Byte 7 6 5 4 3 2 1 0

Reserved (0) Page Code (00h)

Reserved (00h)

(MSB)

Page Length (0002h)

SUPPORTED PAGE LIST

(00h)

(30h)

• Page Length

Field specifies length in bytes of the supported page list.

• Supported Page List

List of all log page codes supported. Currently, there are 2 pages supported:

• Supported Log Page (00h)

• Medium Changer Statistics Page (30h)

(LSB)

• Medium Changer Statistics Page

Page returns medium changer statistical data (see table 22).

Table 22 Medium Changer Statistics Page

28 Quantum DX-Series Software Interface Guide

Bit/Byte 7 6 5 4 3 2 1 0

4 - 11

Reserved (0) Page Code (30h)

Reserved (00h)

(MSB)

Page Length

LOG PARAMETER LIST

Log Parameter (First)

(LSB)

Chapter 2 Emulated Medium Changer SCSI Commands

Log Sense (4Dh)

Bit/Byte76543210

. .

Table 23 Log Parameter

x-7 - x

Log Parameter (Last)

• Page Length

Field specifies length in bytes of the log parameter list.

• Log Parameter

Each log parameter begins with a 4-byte parameter header followed by 4 bytes of parameter value data. For the log parameter format, see

table 23.

Bit/Byte 7 6 5 4 3 2 1 0

(MSB)

Parameter Code

DU(0) DS(0) TSD(0) ETC(0) TMC(0) Rsv(0) LP(0)

(MSB)

4 - 7

Parameter Length (04h)

Parameter Value

(LSB)

• Parameter Code Parameter Code field identifies which log parameter is being

transferred for that log page. For parameter codes, see

table 24.

•DU

Disable Update. Not supported, always 0.

•DS

Disable Save. Not supported, always 0.

•TSD

Target Save Disable. Not supported, always 0.

Quantum DX-Series Software Interface Guide 29

Chapter 2 Emulated Medium Changer SCSI Commands Log Sense (4Dh)

•ETC

Enable Threshold Comparison. Not supported, always 0.

•TMC

Threshold Met Criteria. Not supported, always 0.

•LP

List Parameter. Not supported, always 0.

• Parameter Length All log parameter values supported in the Medium Changer

Statistics page have a length of 4 bytes.

• Parameter Value

The cumulative count of parameter as described in table 24.

Table 24 Supported Log Parameter Codes for 30h Page

Parameter Code Description

8000 Number of seconds system has been

powered on

8001 Reserved 4

8010 Number of attempted moves from a bin 4

8011 Number of attempted moves to a bin 4

8012 Number of attempted moves from a drive 4

8013 Number of attempted moves to a drive 4

8014 Number of attempted moves from load port 4

8015 Number of attempted moves to load port 4

8020 Reserved 4

8021 Reserved 4

8022 Reserved 4

Size (bytes)

30 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Log Sense (4Dh)

Parameter Code Description

8023 Reserved 4

8024 Reserved 4

8025 Reserved 4

8026 Reserved 4

8030 Reserved 4

8031 Reserved 4

8032 Reserved 4

8033 Reserved 4

8035 Reserved 4

8036 Reserved 4

8040 Reserved 4

8041 Reserved 4

Size (bytes)

8042 Reserved 4

8043 Reserved 4

8044 Reserved 4

8045 Reserved 4

8050 Reserved 4

8051 Reserved 4

8052 Reserved 4

Quantum DX-Series Software Interface Guide 31

Chapter 2 Emulated Medium Changer SCSI Commands Mode Select (15h)

Mode Select (15h) 2

The Mode Select command provides a means for the host to specify

parameters to the DX-Series system. The DX-Series system supports:

• Element Address Assignment Page 1Dh

• Vendor Unique Page 20h

• Vendor Unique Page 00h

Table 25 Mode Select Command

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number PF (1) Reserved (0)

Operation Code (15h)

Reserved (0000h)

Parameter List Length

Reserved (00h)

• Logical Unit Number

The Logical Unit Number field must be set to 0. This field indicates

the logical unit to which the command is sent.

• SP - Save Page

• When set to 0, the Save Page field performs mode select without

saving

• When set to 1, Save Page performs Mode Select and saves it in

nonvolatile memory

•PF When set to 1, the Page Format field indicates the Mode Select

Parameters are formatted as specified in the SCSI-2 specification.

• Parameter List Length

32 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Select (15h)

The PLL field indicates the length of the parameter list. The list

length should reflect the combined length of all data pages being sent

with the Mode Select command. Mode Select Data pages are

shown in

table 26, table 27, and table 28.

The format for Mode Select Vendor Unique Page 20h is shown in

table 26.

Table 26 Mode Select Data - Vendor Unique Page 20h

Bit/Byte 7 6 5 4 3 2 1 0

PS (0) Rsvd (0) Page Code (20h)

Page Length (02h)

Reserved (00h)

Reserved (00h) ADU EXB(0)

SER(1)

AC DLR

• PS - Parameters Savable

This bit is only used with the Mode Sense command. This bit is reserved for Mode Select command and should be set to 0.

• DLR-Drive Load Retry

This bit is ignored. It can be set to 1 or 0 for compatibility with hosts.

• SER

This bit enables Drive Serialization, which enables the reporting of drive serial numbers in the Alternative Volume Tag (AVoltag) field of the drive Read Element Status. The default setting is Enabled

Note: This must always be set to 1. Any attempt to disable this

bit will result in a check condition (05 26 00).

• AC-Auto Clean

When this bit is set to 1, automatic drive cleaning feature is enabled When set to 0, automatic drive cleaning is disabled. This bit is ignored. It can be set to 0 or 1 for compatibility with hosts

Note: The normal state of automatic drive cleaning is

“disabled.”

Quantum DX-Series Software Interface Guide 33

Chapter 2 Emulated Medium Changer SCSI Commands Mode Select (15h)

• ADU-Auto Drive Unload

• When this bit is set to 1, the DX-Series system unloads a tape

drive as part of the Move Medium command (default condition)

• When set to 0, the auto drive unload feature is disabled

• EXB-Exabyte Emulation

• When this bit is set to 1, the DX-Series system emulates an

Exabyte EXB-120 - this setting changes the SCSI command set’s

behavior

• When set to 0, the DX-Series system SCSI interface operates in the

default manner as described in this document

The format for Mode Select Vendor Unique Page 00h is shown in

table 27.

Table 27 Mode Select Data - Vendor Unique Page 00h

Bit/Byte 7 6 5 4 3 2 1 0

4 - 63

PS (0)

AInit UInit (0) Parity (0) NBL Rsrvd (0)

Rsrvd

(0)

Page Code (00h)

Page Length (3Eh)

NRDC

(0)

Maximum Parity Retries (00h)

Display Messages (00h)

• PS - Parameters Savable

This bit is only used with the Mode Sense command (see table 32). This bit is reserved for Mode Select command and should be set to 0.

•AInit

• When set to 1 the DX-Series system ensures that all elements

have been inventoried before entering the On-line state

• If set to 0, the DX-Series system only inventories itself when

commanded to by the Init Element Status or Init Element Status with Range command

MDC

(0)

34 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Select (15h)

•UInit

Not supported.

•Parity

Not supported.

• NBL - No bar code Labels

• Valid only if the AInit field value is 1 - when DX-Series system performs an inventory due to going on-line, and the NBL field

value is 1, bar codes are not scanned and primary volume tags are set to empty

•If NBL field is set to 0, when the DX-Series system performs an

inventory due to going on-line bar codes are scanned and their value placed in the corresponding primary volume tag

• NRDC - Not Ready Display Control

Not supported.

• MDC - Message Display Control

Not supported.

Table 28 Mode Select Data - Element Address Assign. Page

• Maximum Parity Retries

Not supported.

• Display Message

Not supported.

The format for the Element Address Assignment Page is shown in

table 28.

Bit/Byte 7 6 5 4 3 2 1 0

Quantum DX-Series Software Interface Guide 35

PS (0)

(MSB)

Rsrvd

(0)

Parameter Length (12h)

First Medium Transport Element Address

Page Code (1Dh)

(LSB)

Chapter 2 Emulated Medium Changer SCSI Commands Mode Select (15h)

Bit/Byte76543210

(MSB)

Number of Medium Transport Elements (0001h)

(LSB)

(MSB)

First Storage Element Address

(LSB)

(MSB)

Number of Storage Elements

(LSB)

(MSB)

First Import Export Element Address

(LSB)

(MSB)

Number of Import Export Elements

(LSB)

(MSB)

First Data Transport Element Address

(LSB)

(MSB)

Number of Data Transport Elements

(LSB)

Reserved (0000h)

• PS - Parameters Savable

This bit is only used with the Mode Sense command (see table 32). Reserved for Mode Select command and should be set to 0.

• First Medium Transport Element Address

Field specifies the first medium transport element contained in the medium changer (other than default medium transport address of 0).

• Number of Medium Transport Elements

Field defines total number of medium transport elements contained in the medium changer.

36 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Select (15h)

• First Storage Element Address

Field specifies the first storage element contained in the medium changer.

• Number of Storage Elements

Field defines total number of storage elements contained in the medium changer.

• First Import/Export Element Address

Field specifies the first import/export element contained in the medium changer.

Tech Tip: The DX-Series system does not support First Import/

Export Element Address.

• Number of Import/Export Elements

Field defines the total number of import/export elements contained in the medium changer.

Table 29 Changeable Parameters within MODE SELECT

Tech Tip: The DX-Series does not support Number of Import/

Export Elements.

• First Data Transport Element Address

The First Data Transfer Element Address field specifies the first

data transfer element contained in the medium changer.

• Number of Data Transport Elements

Field defines the total number of data transfer elements contained within the medium changer and accessible to the medium transport elements.

Parameter Default Minimum Maximum

AInit(00h)

10 1

NBL(00h) 0 0 1

AC(20h)

00 1

Quantum DX-Series Software Interface Guide 37

Chapter 2 Emulated Medium Changer SCSI Commands Mode Select (15h)

Parameter Default Minimum Maximum

DLR(20h) 0 0 1

ADU(20h) 1 0 1

38 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Sense (1Ah)

Mode Sense (1Ah) 2

The SCSI Mode Sense command provides a general method for a host to

obtain current parameter settings of a target device. The host selects the

set parameters to be returned by setting the Page Code field in the

command block. This code selects the page of parameter information to be returned by the target.

The DX-Series system supports the three medium changer device parameter pages defined in the SCSI-2 specification and two vendor unique pages:

• Element Address Assignment Page

• Transport Geometry Parameters Page

• Device Capabilities Pag e

• Vendor Unique Page 20h

• Vendor Unique Page 00h The host can request all pages with a single command using the Return

All Pages page code as described in the SCSI-2 specification. The format for the Mode Sense command block is shown in table 30.

Quantum DX-Series Software Interface Guide 39

Chapter 2 Emulated Medium Changer SCSI Commands Mode Sense (1Ah)

Table 30 Mode Sense Command

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number

PC Page Code

Operation Code (1Ah)

Rsrvd

(0)

Reserved (00h)

Allocation Length

Reserved (00h)

DBD Reserved (00)

• Logical Unit Number

The Logical Unit Number field must be set to 0. This field indicates

the logical unit to which the command is sent.

• DBD

• When the Disable Block Descriptors field is set to 0, the target may return 0 or more block descriptors in the returned Mode Sense data at the target’s discretion

•A DBD bit of 1 specifies the target does not return any block descriptors in the returned Mode Sense data

•PC

The Page Control field defines parameter type values to return:

• 0 — requests current parameter values for the specified page code for the DX-Series system - current values returned are the default values

• 1 — requests the target to return the changeable parameter mask for the page code specified - the page indicates which parameters are changeable

• 2 — requests the target return the default values for the page code specified

• 3 — requests the target return saved values for the page code

specified - only the Vendor Unique Page has changeable/

savable parameters

40 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Sense (1Ah)

• Otherwise, the current setting for each parameter is always the same as the setting that parameter had when the DX-Series system was turned on

• Page Codes

The valid page codes are:

• 00h — Vendor Unique Page, length 44h

• 1Dh — Element Address Assignment Page, length 18h

• 1Eh — Transport Geometry Parameters Page, length 08h

• 1Fh — Device Capabilities Page, length 18h

• 20h — Vendor Unique Page, length 08h

• 3Fh — Return All Pages, length 74h

The parameter data returned for each Mode Sense command is preceded by a Mode Parameter header block. The header block is then followed by either the requested parameter page or all pages if the Return All Pages

page code was used.

The format for the Mode Sense header block is shown in table 31.

Table 31 Mode Sense Data Header

Bit/Byte 7 6 5 4 3 2 1 0

Mode Sense Data Length

Medium Type (00h)

Device-Specific Parameter (00h)

Block Descriptor Length (00h)

• Mode Data Length

Field is set to the data amount following the Data Length field in

bytes. This includes the last 3 bytes in the header block as well as all bytes in the parameter page or pages.

• Medium Type Code

Field is reserved for medium changer devices.

Quantum DX-Series Software Interface Guide 41

Chapter 2 Emulated Medium Changer SCSI Commands Mode Sense (1Ah)

• Device-Specific Parameter

Field is reserved for medium changer devices.

• Block Descriptor Length

Field is reserved for medium changer devices.

The format for Mode Sense Vendor Unique Page 00h is shown in

table 32.

Table 32 Mode Sense Data - Vendor Unique Page 00h

Bit/Byte 7 6 5 4 3 2 1 0

4 - 63

PS (1)

AInit

Rsrvd

(0)

UInit

(0)

Page Code (00h)

Page Length (3Eh)

Parity

Maximum Parity Retries (00h)

NBL

(0)

Display Messages (00h)

Rsrvd

(0)

NRDC

(0)

MDC (0)

• PS-Parameters Savable

This bit is always set to 1 indicating this page can be saved to nonvolatile memory.

•AInit

• When this value is set to 1, the DX-Series system insures all elements have been inventoried before entering the on-line state

• If set to 0, the DX-Series system only inventories itself when

commanded by a Init Element Status or Init Element Status

with Range command

•UInit

Not supported.

•Parity

Not supported.

42 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Sense (1Ah)

• NBL - No Bar Code Labels

• Field is valid only if the AInit field value is 1-when the DX-Series system performs an inventory due to going on-line, and NBL

field is 1, bar codes are not scanned and primary volume tags are set to empty

• If this field is set to 0, when the DX-Series system performs an inventory due to going on-line, bar codes are scanned and their value placed in the corresponding primary volume tag

• NRDC - Not Ready Display Control

Not supported.

• MDC - Message Display Control

Not supported.

• Maximum Parity Retries

Not supported.

• Display Message

Not supported.

Table 33 Mode Sense Data - Element Address Assign. Page

The format for the Element Address Assignment Page is shown in

table 33.

Bit/Byte 7 6 5 4 3 2 1 0

Quantum DX-Series Software Interface Guide 43

PS (1)

(MSB)

Rsrvd

(0)

Parameter Length (12h)

First Medium Transport Element Address

Number of Medium Transport Elements (0001h)

First Storage Element Address

Page Code (1Dh)

(LSB)

Chapter 2 Emulated Medium Changer SCSI Commands Mode Sense (1Ah)

Bit/Byte76543210

(MSB)

Number of Storage Elements

(LSB)

(MSB)

First Import Export Element Address

(MSB)

Number of Import Export Elements

(MSB)

First Data Transport Element Address

(MSB)

Number of Data Transport Elements

Reserved (0000h)

• PS-Parameters Savable

This bit is always set to 1 indicating this page can be saved to nonvolatile memory.

• First Medium Transport Element Address

(LSB)

Field identifies the first medium transport element contained in the medium changer (other than the default medium transport address of 0).

• Number of Medium Transport Elements

Field defines total number of medium transport elements contained in the medium changer.

44 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Sense (1Ah)

• First Storage Element Address

Field identifies the first storage element contained in the medium changer.

• Number of Storage Elements

Field defines total number of storage elements contained in the medium changer.

• First Import/Export Element Address

Field identifies the first import/export element contained in the medium changer.

Tech Tip: The DX-Series system does not support First Import/

Export Element Address.

• Number of Import/Export Elements

Field defines total number of import/export elements in the medium changer.

Tech Tip: The DX-Series system does not support Number of

Import/Export Elements.

• First Data Transport Element Address

The First Data Transfer Element Address field identifies the first

data transfer element contained in the medium changer.

• Number of Data Transport Elements

Field defines total number of data transfer elements contained within the medium changer and accessible to medium transport elements.

The format for the Trans port Geomet ry Parameters Page is shown

table 34.

Quantum DX-Series Software Interface Guide 45

Chapter 2 Emulated Medium Changer SCSI Commands Mode Sense (1Ah)

Table 34 Mode Sense Data - Trans. Geometry Para. Page

Bit/Byte 7 6 5 4 3 2 1 0

PS (0)

Rsrvd

(0)

Parameter Length (02h)

TRANSPORT GEOMETRY DESCRIPTOR

Reserved (00h)

Member Number In Transport Element Set (00h)

Page Code (1Eh)

• PS- Parameters Savable

This bit of 0 indicates the target is not capable of saving the page in a nonvolatile vendor-specific location.

• Parameter Length

There are 2 bytes of parameter information.

• Transport Geometry Descriptor

The geometry of each medium transport element is defined using a two-byte field.

Rotate

(0)

•Rotate

A rotate bit of 0 indicates the medium transport element does not support media rotation.

• Member Number In Transport Element Set

The first element in a set has a member number of 0.

The format for the Device Capabilities Page is shown in table 35.

46 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Sense (1Ah)

Table 35 Mode Sense Data - Device Capabilities Data

Bit/Byte 7 6 5 4 3 2 1 0

8 - 11

PS (0)

Rsrvd

(0)

Reserved (0h)

Page Code (1Fh)

Parameter Length (12h)

StorDT

StorIEb

(1)

Reserved (0h)

MT→DT

(1)

ST→DT

IE→DT (0) IE→IE (0) IE→ST (0)

DT→DT

ST→IE (0) ST→ST (1)

(1)

DT→IE (0)

(1)

Reserved (00000000h)

MT↔DT

(0)

ST↔DT

ST↔IE (0) ST↔ST (0)

(0)

MT→IE

(0)

MT↔IE

(0)

StorSTc

(1)

MT→ST

(1)

DT→ST

(1)

MT↔ST

(0)

StorMTd

MT→MT

ST→MT

IE→MT

DT→MT

MT↔MT

ST↔MT

(1)

(0)

(1)

(0)

(1)

(0)

IE↔MT

(0)

DT↔MT

(0)

16 - 19

Reserved (0h)

IE↔DT

(0)

DT↔DT

(0)

Reserved (00000000h)

IE↔IE (0) IE↔ST (0)

DT↔IE

(0)

DT↔ST

a.DT = Data Transfer Element (Tape Drive) b.IE = Import/Export Element (load port) c.ST = Storage Element (Bin) d.MT = Medium Transport Element (Gripper Mechanism)

The StorDT, StorIE, StorST, and StorMT fields indicate if an element of the indicated type (DT, IE, ST, or MT) is capable of storing a tape

cartridge.

Quantum DX-Series Software Interface Guide 47

Chapter 2 Emulated Medium Changer SCSI Commands Mode Sense (1Ah)

The XX→YY fields indicate if a transfer from an element of type XX is possible to an element of type YY. A 1 in any of these fields indicates that

all Move Medium commands where the source element is type XX and

destination element is type YY are supported. A 0 in these fields indicates the move may or may not be valid depending on the particular element requested.

The DX-Series system does not support the Exchange Medium

command. Bytes 12 through 15 in this parameter page contain the individual fields specifying the DX-Series system exchange capabilities. Since the DX-Series system has no exchange capability, all of these fields are 0.

The format for Mode Sense Vendor Unique Page 20h is shown in

table 36.

Table 36 Mode Sense Data - Vendor Unique Page 20h

Bit/Byte 7 6 5 4 3 2 1 0

PS (1) Rsvd (0) Page Code (20h)

Page Length (02h)

Reserved (00h)

Reserved (00h) ADU EXB

SER

AC DLR

• PS-Parameters Savable

This bit is always set to 1 indicating that this page can be saved to nonvolatile memory.

• Page Code

The page code value of 20h is used to indicate a vendor unique page, in page format.

• Page Length

The page length is fixed at a value of 2 bytes.

• SER

This bit enables Drive Serialization, which enables reporting the

drive serial numbers in the Alternative Volume Tag (AVoltag) field of the drive Read Element Status. The default setting is Enabled.

48 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Sense (1Ah)

• AC-Auto Clean

• If this bit is set to 1 the current state of automatic drive cleaning is “enabled”

• When it is set to 0, the feature is “disabled”

• DLR-Drive Load Retry

This bit is ignored. Can be set to 1 or 0 for compatibility.

• ADU-Auto Drive Unload

• When bit is set to 1, the DX-Series system unloads a tape drive as

part of the Move Medium command (default condition)

• When set to 0, the auto drive unload feature is disabled

Quantum DX-Series Software Interface Guide 49

Chapter 2 Emulated Medium Changer SCSI Commands Move Medium (A5h)

Move Medium (A5h) 2

The host uses the Move Medium command to move a tape cartridge from

one element to another within a DX-Series system. The host specifies the source element and the destination element in the command block. The DX-Series system then moves the tape cartridge contained in the source element to the empty destination element.

If the Mode Select Data ADU (auto drive unload) bit is set to 1, and the

source element is a tape drive, the DX-Series system unloads the tape

drive as part of the Move Medium command.

The source and destination elements can be of any type: storage, medium transport, import/export, or data transport element. The valid combinations of source element type and destination element type are

summarized in the Mode Sense Device Capabilities Parameter Page

(see

table 35).

If a valid source element type and destination element type are specified, the command is valid but the operation may still not be possible. In this case the DX-Series system returns check condition status and sets the sense key to Illegal Request.

The Additional Sense Code and Additional Sense Code Qualifier

indicate why an operation cannot be carried out. For example, this might occur if the specified source element or destination element does not contain a tape cartridge. For a summary of the conditions, sense key, and additional sense encoding, see

table 226 on page 279.

The format for the Move Medium command block is shown in table 37.

Table 37 Move Medium Command

50 Quantum DX-Series Software Interface Guide

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number Reserved (00h)

(MSB)

Operation Code (A5h)

Transport Element Address (0000h)

(LSB)

Chapter 2 Emulated Medium Changer SCSI Commands

Move Medium (A5h)

Bit/Byte76543210

(MSB)

Source Element Address

(MSB)

Destination Element Address

Reserved (0000h)

Reserved (00h)

• Logical Unit Number

The Logical Unit Number must be set to 0. This field indicates the

logical unit to which the command is sent.

• Transport Element Address

The default medium transport element address of 0 or the medium

transport element address specified by the Mode Sense Data can be

used.

(LSB)

Invert

(0)

• Source Element Address

The source element address specifies the location from which the medium is taken.

• Destination Element Address

The destination address specifies the location to which the medium is moved.

•Invert

The medium changer does not support medium rotation for handling

double-sided media. The Invert bit must be set to 0.

Quantum DX-Series Software Interface Guide 51

Chapter 2 Emulated Medium Changer SCSI Commands Position To Element (2Bh)

Position To Element (2Bh) 2

The Position To Element command is used by the host to position the

medium transport element in front of another element within a DX-Series system. The host specifies the destination element in the command block. The DX-Series system then moves the transport element in front of the destination element.

The destination element can be one of these types:

•Storage

• Import/Export

Tech Tip: The DX-Series system does not support import/

export.

• Data Transfer

If the address is in error, the DX-Series system returns check condition status and sets the sense key to Illegal Request.

The format of the Position To Element command block is shown

table 38.

Table 38 Position To Element Command

52 Quantum DX-Series Software Interface Guide

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number Reserved (00h)

(MSB)

Operation Code (2Bh)

Transport Element Address (0000h)

Destination Element Address

(LSB)

Chapter 2 Emulated Medium Changer SCSI Commands

Position To Element (2Bh)

Bit/Byte76543210

Reserved (00h)

• Logical Unit Number

The Logical Unit Number must be set to 0. This field indicates the

logical unit to which the command is sent.

• Transport Element Address

The default medium transport element address of 0 or the medium transport element address specified by the mode sense data can be used.

• Destination Element Address

The destination address specifies the location to which the medium transport element is moved.

•Invert

The medium changer does not support medium rotation for handling double-sided media. The invert bit must be set to 0.

Invert

(0)

Quantum DX-Series Software Interface Guide 53

Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

Read Element Status (B8h) 2

The host can determine the status of any DX-Series system element by

issuing a Read Element St atus command. The command can specify the

element type:

• Medium Transfer

•Storage

• Import/Export

Tech Tip: The DX-Series system does not support import/

export.

• Data Transfer

• Starting Address

• Number of elements for which status information is to be returned

The DX-Series system automatically updates its internal element status every time the status changes. The DX-Series system inventory initializes the information and it is updated with each move. Because the information is updated with each move, no action is required by the DXSeries system other than returning the information it has stored.

The format for the Read Element Status command block is shown in

table 39.

Table 39 Read Element Status Command

54 Quantum DX-Series Software Interface Guide

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number VolTag Element Type Code

(MSB)

Operation Code (B8h)

Starting Element Address

Number of Elements

(LSB)

Chapter 2 Emulated Medium Changer SCSI Commands

Read Element Status (B8h)

Bit/Byte76543210

(MSB)

Reserved (00h)

Allocation Length

Reserved (00h)

• Logical Unit Number The Logical Unit Number is 0.

•VolTag

•The Volume Tag field (VolTa g) indicates whether the volume tag

information associated with each tape cartridge should be returned as part of the status information.

• The volume tag (or bar code) is updated for each tape cartridge

whenever it is moved with a Move Medium command.

• The volume tag information for all tape cartridges can also be

updated using the Initialize Element Status command (see

Initialize Element Status (07h) on page 13). Since tape cartridges

are a single-sided media, only a single volume tag is supported per tape cartridge.

(LSB)

• Element Type Code

This field indicates which element type is reported:

• 0 indicates all element types reported

• 1 indicates medium transport element

• 2 indicates storage element

• 3 indicates import/export element

Tech Tip: The DX-Series system does not support import export

elements.

Quantum DX-Series Software Interface Guide 55

Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

• 4 indicates data transfer elements

• Starting Element Address and Number of Elements

These fields are used to select the range of elements to report. Within this range, no status information is reported for an undefined element address.

• Only elements matching the indicated type are returned

• No elements with an address smaller than the Starting Element Address are reported

• Beginning with the first defined element with an address greater

than or equal to the Starting Element Address, all defined, type

matching elements are reported until reports for the indicated number of elements have been returned

• Allocation Length

This field specifies how much memory the host has set aside to store the status information returned by the DX-Series system.

• This field should be set to a number that is large enough to store the status information for the requested number of elements

• If the field is not large enough, the DX-Series system only reports the status information for the number of elements whose status information fits within the allocated space

The returned Read Element Status Data has the general structure as

depicted in

56 Quantum DX-Series Software Interface Guide

figure 1.

Chapter 2 Emulated Medium Changer SCSI Commands

Read Element Status (B8h)

Figure 1 Read Element Status Data General Structure

Read Element Status Data

Read Element Status Data Header

Element Status Data Page (first or only)

Element Status Data Page Header

Element Descriptor (first or only)

. .

Other Element Descriptors (if any)

. .

Other Status Data Pages (if any)

A single Read Element Status Data Header is returned along with one or more element status pages. The Read Element Status Data Header

indicates the address of the first element reported, number of elements reported, and the report size for all requested data.

The report size is given in bytes.

• The size is the total number of bytes that would be contained in the

report for all requested data minus 7

The Read Element Status command can be given with an Allocation Length of 8 to determine how much space must be allocated to transfer

all status data requested by the command.

The format for the Read Element St atus Data is shown in table 40.

Quantum DX-Series Software Interface Guide 57

Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

Table 40 Read Element Status Data

Bit/Byte 7 6 5 4 3 2 1 0

8 - X

(MSB)

First Element Address Reported

(MSB)

Number of Elements Reported

Reserved (00h)

(MSB)

Byte Count of Report Available

One or More Element Status Page(s)

• First Element Address Reported

Indicates element address of element with smallest element address found to meet the command description block request.

• Number of Elements Reported

• Indicates number of elements meeting the request in the command descriptor block

(LSB)

• Element status is returned if sufficient allocation length was specified

• Byte Count of Report Available

Indicates number of bytes of element status page data available for all elements meeting the request in the command descriptor block.

From 1 to 4 Element Status Pages can be returned.

• One page is returned for each element type with status information

• Each page contains a header and 1 or more element descriptors

• Each element descriptor reports the status for a single DX-Series system element

58 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Read Element Status (B8h)

The page header (bytes 0-7) defines the contents of the element descriptors for the elements of that type. The format of a status page is shown in

table 41.

Table 41 Element Status Page

Bit/Byte 7 6 5 4 3 2 1 0

8 - X

PVol

Tag

(MSB)

AVol

Tag

Byte Count of Descriptor Data Available

Element Type Code

Reserved (00h)

Element Descriptor Length

Reserved (00h)

One or More Element Descriptors

•PVolTag

•A Primary Volume Tag field value of 1 indicates the primary

volume tag information field is present in each of these element descriptor blocks

(LSB)

• A value of 0 indicates these bytes are omitted from the element descriptors that follow

•AVolTag

•An Alternate Volume Tag field value of 1 indicates the alternate

volume tag information field is present in each of these element descriptor blocks

• A value of 0 indicates these bytes are omitted from the element descriptors that follow

• Element Descriptor Length

Field indicates the number of bytes in each element descriptor.

Quantum DX-Series Software Interface Guide 59

Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

• Byte Count of Descriptor Data Available Byte Count of Descriptor Data Available indicates the number of

bytes (minus 7) of descriptor data (excluding this header) that are returned for the descriptors of the specified type if an adequate allocation length had been specified

There are 4 types of element descriptor blocks, 1 for each element type.

• There are several fields found in more than 1 element type descriptor, as well as fields which are unique to an element descriptor

• Fields found in more than 1 type of element descriptor are indicated by the same name in the following illustrations and descriptions

• The format of an descriptor for an element of the medium transport element type is shown in

table 42.

Table 42 Medium Transport Element Descriptor

Bit/Byte 7 6 5 4 3 2 1 0

(MSB)

SValid

(0)

Element Address

Reserved (00h) Except

Reserved (00h)

Additional Sense Code

Additional Sense Code Qualifier

Reserved (000000h)

Invert

(0)

Source Storage Element Address (0000h)

Reserved (00h)

Rsrvd

(0)

(LSB)

Full

60 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Read Element Status (B8h)

Bit/Byte76543210

12 - 47

48 - 51

Primary Volume Tag Information

(Field omitted if PVolTag = 0)

Reserved (00000000h)

Vendor Unique (0000h)

• Element Address

This field indicates the address of the element being reported by that element descriptor.

• Except

• When the element is in a normal state, it is set to 0

• When the element is in an abnormal state, it is set to 1

• Information on the abnormal state is available in the Additional

Sense Code and Additional Sense Code Qualifier fields

•Full

•The Full field is set to 1 whenever the element contains a tape

cartridge

• It is set to 0 otherwise

• Additional Sense Code and Additional Sense Code Qualifier

These fields are only valid if the Exception field is set to one.

• SValid, Invert, and Source Storage Element Address

This field, and the invert bit information value of 0 indicates these fields are not valid (

table 44).

• Primary Volume Tag Information

If the Volume Tag information was requested in the command block (VolTag=1), the Primary Volume Tag Information field is included

in the element descriptor. This field contains the information read from the tape cartridge bar code label; its format is shown in

Quantum DX-Series Software Interface Guide 61

table 43.

Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

Table 43 Primary Volume Tag Information

Table 44 Storage Element Descriptor

Bit/Byte 7 6 5 4 3 2 1 0

12 - 43

Volume Identification Field

Reserved (0000h)

Volume Sequence Number (0000h)

• Volume Identification Field

A left justified sequence of ASCII characters representing the bar code scanned from the cartridge followed by blanks 20h.

• Volume Sequence Number

This field is reserved and set to 0.

Bit/Byte 7 6 5 4 3 2 1 0

(MSB)

Element Address

(LSB)

Reserved (0h) Access Except

Reserved (00h)

Additional Sense Code

Additional Sense Code Qualifier

Reserved (000000h)

SValid

Invert

(0)

62 Quantum DX-Series Software Interface Guide

Reserved (00h)

Rsrvd

(0)

Full

Chapter 2 Emulated Medium Changer SCSI Commands

Read Element Status (B8h)

Bit/Byte76543210

Source Storage Element Address

12 - 47

48 - 51

Primary Volume Tag Information

(Field omitted if PVolTag = 0)

Reserved (00000000h)

Vendor Unique (0000h)

• Element Address

This field indicates the address of the element being reported by that element descriptor.

• Access

• An access bit value of 1 indicates that access to the element by a medium transport element is allowed

• The access bit may be set to 0 or 1 for the bins in the 2 removable packs

• Access bit is always set to 1 for the other non-removable bins in the system

• Except

• When the element is in a normal state, it is set to 0

• When the element is in an abnormal state, it is set to 1

• Information on the abnormal state is available in the Additional Sense Code and Additional Sense Code Qualifier fields in the

element descriptor. For the meaning of the codes contained in the

two Sense Code fields, see

Request Sense (03h) on page 75.

•Full

•The Full field is set to 1 whenever the element contains a tape

cartridge

• It is set to 0 otherwise

• Additional Sense Code and Additional Sense Code Qualifier

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Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

These fields are only valid if the Exception field is set to 1. SValid

•The SValid bit is set to 1 if the information in the Source Storage Element Address field is valid

• If information is unknown (due to a door open or power on

condition), the SValid bit is set to 0

•Invert The Invert field is not supported and is set to 0.

• Source Storage Element Address Source Storage Element Address represents the address of the last

storage element that held the cartridge. The SValid field indicates

whether this information is valid.

• Primary Volume Tag Information

If the Volume Tag information is requested in the command block (VolTag=1), then the Primary Volume Tag Information field is

included in the element descriptor. For format, see

The layout of an element descriptor for an element of the import /export element type is illustrated in

table 43.

table 45.

T able 45 Import/Export Element Descriptor

64 Quantum DX-Series Software Interface Guide

Bit/Byte 7 6 5 4 3 2 1 0

(MSB)

Reserved (0)

Element Address

Import Enable

Additional Sense Code Qualifier

Export Enable

Reserved (00h)

Additional Sense Code

Reserved (000000h)

Access Except

Import Export

(LSB)

Full

Chapter 2 Emulated Medium Changer SCSI Commands

Read Element Status (B8h)

Bit/Byte76543210

12 - 47

48 - 51

SValid

Invert

(0)

Reserved (00h)

Source Storage Element Address

Primary Volume Tag Information

(Field omitted if PVolTag = 0)

Reserved (00000000h)

Vendor Unique (0000h)

• Import Element

The Import Enable field indicates if the element can import a tape

cartridge into the DX-Series system. This field is always set to 1 because imports are possible through that element.

• Import Enable

The Import Enable field indicates if the element can export a tape

cartridge from the DX-Series system. It is set to 1.

•Export Enable

The Export Enable field indicates whether the element can export a

tape cartridge from the DX-Series system. It is set to 1.

• Access

• An access bit value of 1 indicates access to the element by a medium transport element is allowed

• This is set to 0 if the load port door is open, or if a load pack has been removed

• Except

• When the element is in a normal state, it is set to 0

• When the element is in an abnormal state, it is set to 1

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Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

• Information on the abnormal state is available in the Additional Sense Code and Additional Sense Code Qualifier fields in that

element descriptor.

meaning of the codes contained in the two Sense Code fields

• Import Export

•The Import/Export field is set to 0 if the tape cartridge contained

in the element was placed there by the transfer mechanism

• It is set to 1 if the tape was placed there by an operator or if its source is unknown (e.g., after power cycle)

•Full

•The Full field is set to 1 whenever the element contains a tape

cartridge

• It is set to 0 when the element contains no tape or the load port door is open

• Additional Sense Code and Additional Sense Code Qualifier These fields are only valid if the Exception field is set to 1. Currently

the only valid values for these fields indicate:

Appendix A, Sense Key Values for the

• Element Contents Unknown condition (ASC=80 ASCQ=22)

• Cleaning Cartridge Installed (ASC=30 ASCQ=03)

• Operator Medium Removal Request (ASC=5A ASCQ=01)

• SValid

•The SValid bit is set to 1 if the information in the Source Storage

Element Address field is valid

• If the information is unknown, the SValid bit is set to 0

•Invert The Invert field is not supported and is set to 0.

• Source Storage Element Address

The Source Storage Element Addres s represents the address of the last storage element that held the cartridge. The SValid field indicates

if this information is valid.

The format of an element descriptor for an element of the data transfer element type is shown in

66 Quantum DX-Series Software Interface Guide

table 46.

Chapter 2 Emulated Medium Changer SCSI Commands

Read Element Status (B8h)

Table 46 Data Transfer Element Descriptor

Bit/Byte 7 6 5 4 3 2 1 0

(MSB)

Reserved (0h) Access Except

Additional Sense Code

Additional Sense Code Qualifier

Not Bus Rsrvd ID Valid

SValid

Invert

(0)

Element Address

Reserved (00)

Valid

SCSI Bus Address

Reserved (00h)

Rsrvd Logical Unit Number

Reserved (00h)

Rrsvd

(0)

(LSB)

Full

Source Storage Element Address

12 - 47

48 - 83

84 - 87

Primary Volume Tag Information

(Field omitted if PVolTag = 0)

Alternate Volume Tag Information

(Field omitted if AVolTag = 0)

Reserved (00000000h)

Vendor Unique (0000h)

• Element Address

This field indicates the address of the element being reported by that element descriptor.

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Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

• Access

An access bit value of 1 indicates access to the element by a medium transport element is allowed.

• Except

• When the element is in a normal state, field is set to 0

• When the element is in an abnormal state, field is set to 1

• Information on the abnormal state is available in the Additional

Sense Code and Additional Sense Code Qualifier fields in that

element descriptor -

meaning of the codes contained in the two Sense Code fields

•Full

•The Full field is set to 1 whenever the element contains a tape

cartridge

• It is set to 0 otherwise

• Additional Sense Code and Additional Sense Code Qualifier These fields are only valid if the Exception field is set to 1. Currently

the only valid values for these fields indicate:

Sense Key Values on page 295 for the

• Element Contents Unknown condition (ASC=80 ASCQ=22)

• Tape Drive Requires Cleaning (ASC=80 ASCQ=01)

• Cleaning Cartridge Installed (ASC=30 ASCQ=03)

• Any tape drive error (ASC=8D or ASC=F3)

•Not Bus

This field is sent as 0. The data transfer element is on the same bus as the media changer device.

•ID Valid

When set to 1, it indicates that the SCSI BUS address field contains valid information.

• LU Valid

When set to 1, it indicates that the Logical Unit Number field contains valid information.

• SCSI Bus Address

If valid, it provides the SCSI address of the primary device served by the media changer at this element address.

68 Quantum DX-Series Software Interface Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Read Element Status (B8h)

• SValid

• The SValid bit is set to 1 if information in the Source Storage Element Address field is valid

• If information is unknown (due to a door open or power on

condition) the SValid bit is set to 0

•Invert

The invert field is not supported and is set to 0.

• Source Storage Element Address

The Source Stor age Element Address represents the address of the last storage element that held the cartridge. The SValid field indicates

whether this information is valid.

• Primary Volume Tag Information If Volume Tag information was requested in the command block

(VolTag = 1), the Primary Volume Tag Information field is included

in the element descriptor. This information is omitted if PVolTag = 0 in the element status page. For format, see

table 43.

• Alternate Volume Tag Information

If the Volume Tag information was requested in the command block (VolTag=1) and Drive Serialization is enabled (mode page 20h, SER=1), the Alternate Volume Tag Information field is included in

the element descriptor and includes the drive serial number in an ASCII text string. The serial number is preceded by four null characters. For format, see

table 47.

Table 47 Alternate Volume Tag Information

Note: For more information on enabling Drive Serialization, see the

Mode Select command Vendor Unique Page 20h, SER bit and the Mode Sense command, SER bit.

Bit/Byte

0 - 3

Quantum DX-Series Software Interface Guide 69

7 6 5 4 3 2 1 0

Reserved

Chapter 2 Emulated Medium Changer SCSI Commands Read Element Status (B8h)

Bit/Byte

4 - 16

17 - 35

76543210

• Drive Serial Number

This field is 12 bytes.

Drive Serial Number

Reserved

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Chapter 2 Emulated Medium Changer SCSI Commands

Release (17h)

Release (17h) 2

The Release command releases the DX-Series system or elements that

match the specified release parameters.

Note: It is not an error to attempt to release the DX-Series system if it

is not currently reserved by the requesting initiator. However, if the DX-Series system is reserved by another initiator, the DX-Series system is not released.

Table 48 Release Command

Bit/Byte 7 6 5 4 3 2 1 0

Logical Unit Number 3rdPty 3rd Party ID

Unused Reserved (00h)

Operation Code (17h)

Reservation ID

Reserved (00h)

Flag (0) Link (0)

• Logical Unit Number

The Logical Unit Number is 0. This field indicates the logical unit to

which the command is sent.

• 3rdPty and 3rd Party ID

The 3rd party release option allows an initiator to release a logical unit or elements that were previously reserved using the 3rd party reservation option.

• If the 3rdPty bit is 0, then the 3rd party release option is not

requested and the command only releases a unit or elements that were reserved without 3rd party reservation

Element

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Chapter 2 Emulated Medium Changer SCSI Commands Release (17h)

• If the 3rdPty bit is 1, the unit or elements released were

originally reserved by the same initiator using the 3rd party reservation option, and if the device is the same SCSI device that was specified in the 3rd party device ID (3rd Party ID) field

• Element ID

The Element field specifies whether this command is a Unit Release.

• If the value is 0, the command releases a reservation placed on this unit by the requesting initiator that meets 3rd party release requirements, if applicable.

• Reservation ID

If the value is 1, the command releases all elements reserved by the requesting initiator that were reserved with the same value as this release attempt and that meet 3rd party release requirements, if applicable.

•Flag Bit

The Flag bit is used in conjunction with the Link bit to notify the initiator in an expedient manner that a command has been completed.

Reservation ID

Flag bits are not supported by the DX-Series system.

•Link Bit

A Link bit set to 1 indicates that the initiator requests continuation of a task (an I/O process) across two or more SCSI commands.

If the Link bit is 1 and the Flag bit is 0, and the task completes successfully, the drive continues the task and returns a status of INTERMEDIATE and a LINKED COMMAND COMPLETE message.

If the Link bit and the Flag bit within a Control word are both set to 1, and the drive completes a command with a status of INTERMEDIATE, the drive returns a LINKED COMMAND COMPLETE message (with Flag).

Link bits are not supported by the DX-Series system.

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Chapter 2 Emulated Medium Changer SCSI Commands

Report LUNS (A0h)

Report LUNS (A0h) 2

The Report LUNS command requests that the peripheral device logical unit numbers of known logical units in the target be sent to the applications client. The command only returns information about the logical units to which commands may be sent.

Table 49 Report LUNS Command

Bit/Byte 7 6 5 4 3 2 1 0

3-5

(MSB)

6-9

Operation Code (A0h)

Reserved

Select Report

Reserved

Allocation Length

Reserved

Control

• Allocation Length

If the Allocation Length is not sufficient to contain the logical unit number values for all configured logical units, the device server still reports as many logical number values as will fit in the Allocation Length.

The format of the report of configured logical units is shown in

table 50.

(LSB)

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Chapter 2 Emulated Medium Changer SCSI Commands Report LUNS (A0h)

Table 50 LUN Reporting Parameter List

Bit/Byte 7 6 5 4 3 2 1 0

(MSB)

0-3

4-7

(MSB)

8-15

n-7 - n

LUN List Length (n-7)

(LSB)

Reserved

LUN (first LUN)

(LSB)

. . .

LUN (last LUN, if more than one)

The LUN List Length field contains the length in bytes of the LUN list that can be transferred. The LUN list length equals the number of logical unit numbers reported multiplied by eight. If the allocation length in the CDB is too small to allow transfer of information about all of the logical units configured, the LUN list length value is not adjusted to reflect the truncation.

74 Quantum DX-Series Software Interface Guide

Quantum DPM5500 User's Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Figures

Tables

Preface

1Theory of Operation

Supported Operational Commands

Initialize Element Status (07h)

Initialize Element Status with Range (E7h) 2

Inquiry (12h) 2

Inquiry Command Data Format

Standard Inquiry Data Format

Supported Vital Product Data Page

Log Sense (4Dh) 2

Mode Select (15h) 2

Mode Sense (1Ah)

Move Medium (A5h) 2

Position To Element (2Bh) 2

Read Element Status (B8h) 2

Release (17h)

Report LUNS (A0h)