Quantum ValueLoader LTO-2 User manual

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LTO-2 SCSI Interface Guide, 50004524 Rev. A, September 2006, Made in USA.
Quantum Corporation provides this publication “as is” without warranty of any kind, either express or
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TRADEMARK STATEMENT
Quantum, the Quantum logo, DLT, DLTtape, and the DLTtape logo are registered trademarks of Quantum
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All other trademarks are the property of their respective companies.

LTO-2 SCSI Interface Guide iii
Contents
Preface xix
Chapter 1 SCSI Interface 1
Overview............................................................................................................. 1
ANSI Standards .......................................................................................... 1
Cabling and Connectors ............................................................................ 2
General Features ......................................................................................... 2
Parallel SCSI Interface ....................................................................................... 2
General Features ......................................................................................... 2
Disconnect/Reconnect Function .............................................................. 3
SCSI Messages............................................................................................. 4
Inbound Messages ...................................................................................... 5
Outbound Messages................................................................................... 6
Extended Messages .................................................................................... 8
Parity Errors................................................................................................. 9
Message Exception Handling ................................................................. 12
Standards Conformance.................................................................................. 15
LTO Conformance ........................................................................................... 17
General Behaviors............................................................................................ 17
Reset Condition......................................................................................... 17
Unit Attention Condition ........................................................................ 17
Contingent Allegiance Condition........................................................... 18

Contents
LTO-2 SCSI Interface Guide iv
Buffered Mode........................................................................................... 18
Immediate Commands............................................................................. 18
Residual Length Function........................................................................ 19
Early Warning Function........................................................................... 19
Error Reporting ......................................................................................... 19
Variable and Fixed Mode Recording ..................................................... 20
Library Features ........................................................................................ 21
Chapter 2 SCSI Commands 24
Command Set ................................................................................................... 24
Command Descriptor Blocks ......................................................................... 26
Command Descriptor Block Formats .................................................... 26
Operation Code Format ........................................................................... 28
Control Byte Format................................................................................. 29
Command Status.............................................................................................. 30
ERASE Command............................................................................................ 32
Completion Status .................................................................................... 33
INQUIRY Command ....................................................................................... 36
Standard Inquiry Data Page.................................................................... 38
Supported Vital Product Data (VPD) Page (00h)................................. 42
Unit Serial Number Page (80h)............................................................... 44
Device Identification Page (83h)............................................................. 45
Drive Component Revision Levels Pages (C0h, C1h) ......................... 48
Drive Component Serial Number Page (C2, C3, C4, C5, C6h)........... 50
Drive Status Page (DFh)........................................................................... 52
Drive State Field Values........................................................................... 57
Cartridge Type Field Values ................................................................... 58
Command Support Data.......................................................................... 59
Completion Status .................................................................................... 61
LOAD UNLOAD Command.......................................................................... 62
Medium Position....................................................................................... 63
Medium Loadable Position ..................................................................... 64
Medium Auxiliary Memory Accessible Position ................................. 65
Medium Loaded and Ready Position .................................................... 66
Completion Status .................................................................................... 67
LOCATE Command ........................................................................................ 69
Completion Status .................................................................................... 71
LOG SELECT Command ................................................................................ 73
Log Pages ................................................................................................... 75
Log Parameters ......................................................................................... 76
Parameter Control Byte............................................................................ 77

Contents
LTO-2 SCSI Interface Guide v
Supported Log Pages ............................................................................... 78
Maximum Counts ..................................................................................... 79
Completion Status .................................................................................... 80
LOG SENSE Command................................................................................... 81
Page Control Field .................................................................................... 83
The Parameter Pointer Field.................................................................... 84
Supported Log Pages ............................................................................... 84
Log Page Format ....................................................................................... 85
Supported Log Pages Log Page (00h) .................................................... 88
Write Error Counters Log Page (02h) .................................................... 91
Read Error Counters Log Page (03h) ..................................................... 92
Sequential Access Device Log Page (0Ch) ............................................ 93
Device Statistics Log Page (14h) ............................................................. 94
Tape Diagnostic Data Log Page (16h).................................................... 96
Tape Alert Log Page (2Eh)..................................................................... 100
Tape Usage Log Page (30h) ................................................................... 111
Tape Capacity Log Page (31h) .............................................................. 112
Data Compression Log Page (32h)....................................................... 113
Error Events Log Page (33h).................................................................. 114
Completion Status .................................................................................. 118
MODE SELECT Command .......................................................................... 119
6-Byte Command Descriptor Block...................................................... 120
10-Byte Command Descriptor Block.................................................... 121
Parameter List ......................................................................................... 122
6-Byte Parameter Header....................................................................... 123
10-Byte Parameter Header..................................................................... 124
Parameter List Block Descriptor........................................................... 126
Mode Parameter Pages .......................................................................... 127
Disconnect/Reconnect Mode Page (02h) ............................................ 128
Control Mode Page (0Ah)...................................................................... 130
Data Compression Control Mode Page (0Fh)..................................... 133
Sequential Access Device Configuration Mode Page (10h).............. 136
Informational Exceptions Mode Page (1Ch)....................................... 140
Drive Capabilities Control Mode Page (21h)...................................... 142
Interface Control Mode Page (22h) ...................................................... 145
Completion Status .................................................................................. 150
MODE SENSE Command............................................................................. 151
6-Byte Command Descriptor Block...................................................... 151
10-Byte Command Descriptor Block.................................................... 153
Mode Sense Data Format....................................................................... 155
6-Byte Mode Parameter Header .......................................................... 156
10-Byte Mode Parameter Header ......................................................... 157
Block Descriptor...................................................................................... 159

Contents
LTO-2 SCSI Interface Guide vi
Mode Parameter Pages .......................................................................... 160
Completion Status .................................................................................. 161
PARK UNPARK Command......................................................................... 162
Completion Status .................................................................................. 163
PREVENT ALLOW MEDIUM REMOVAL Command............................ 164
Completion Status .................................................................................. 166
READ Command ........................................................................................... 167
Command Operation ............................................................................. 170
End of Data (EOD).................................................................................. 170
Filemark (FM).......................................................................................... 170
Transfer Length Satisfied ...................................................................... 171
End of Tape (EOT) or End-of-Partition (EOP) ................................... 171
Recoverable Data Error.......................................................................... 171
Unrecoverable Data Error ..................................................................... 171
Incorrect Length..................................................................................... 172
Fixed Mode Residual Data .................................................................... 173
Variable Mode Residual Data ............................................................... 174
Completion Status .................................................................................. 175
READ BLOCK LIMITS Command ............................................................. 177
Returned Data ......................................................................................... 178
Completion Status .................................................................................. 179
READ BUFFFER Command......................................................................... 180
Read Buffer Header ................................................................................ 182
Read Buffer Descriptor........................................................................... 183
Echo Buffer Descriptor........................................................................... 183
Echo Buffer............................................................................................... 184
MAM Page Identification ...................................................................... 184
Completion Status .................................................................................. 186
READ POSITION Command ....................................................................... 187
Returned Data ......................................................................................... 189
Completion Status .................................................................................. 193
RECEIVE DIAGNOSTIC RESULTS Command ........................................ 194
Returned Data ......................................................................................... 195
Completion Status .................................................................................. 200
RELEASE UNIT Command.......................................................................... 201
6-Byte Command Descriptor Block...................................................... 201
10-Byte Command Descriptor Block.................................................... 202
Completion Status .................................................................................. 204
REPORT DENSITY SUPPORT Command ................................................. 205
Returned Data ......................................................................................... 206
Report Density Support Data Block Descriptor ................................. 207
Completion Status .................................................................................. 210
REPORT LUNS Command........................................................................... 211

Contents
LTO-2 SCSI Interface Guide vii
Returned Data ......................................................................................... 212
Completion Status .................................................................................. 214
REQUEST SENSE Command....................................................................... 215
Sense Data Management........................................................................ 215
Returned Data ......................................................................................... 217
Sense Key Values .................................................................................... 222
Additional Sense Codes and Code Qualifiers .................................... 231
Vendor Unique Message Codes ........................................................... 241
Completion Status .................................................................................. 242
RESERVE UNIT Command.......................................................................... 243
Completion Status .................................................................................. 246
REWIND Command...................................................................................... 247
Completion Status .................................................................................. 249
SEND DIAGNOSTIC Command................................................................ 250
Diagnostic Pages ..................................................................................... 252
Completion Status .................................................................................. 254
SET CAPACITY Command.......................................................................... 256
Completion Status .................................................................................. 258
SPACE Command.......................................................................................... 260
Space-By-Count Functions .................................................................... 262
Space-to-EOD Function.......................................................................... 263
Completion Status .................................................................................. 263
TEST UNIT READY Command................................................................... 265
Completion Status .................................................................................. 266
VERIFY Command ........................................................................................ 268
Command Operation ............................................................................. 269
Completion Status .................................................................................. 270
WRITE Command.......................................................................................... 272
Completion Status .................................................................................. 274
WRITE BUFFER Command.......................................................................... 276
Soft Microcode Download..................................................................... 278
Hard Microcode Download .................................................................. 278
Echo Buffer............................................................................................... 279
Write Buffer Data Header...................................................................... 279
Completion Status .................................................................................. 280
WRITE FILEMARKS Command.................................................................. 281
Completion Status .................................................................................. 282

Contents
LTO-2 SCSI Interface Guide viii
Appendix A Message Codes 284
Index 467

LTO-2 SCSI Interface Guide ix
Tables
Table 1 SCSI Message Codes................................................................................... 4
Table 2 Drive to Host SCSI Messages.................................................................... 5
Table 3 Host to Drive SCSI Messages.................................................................... 6
Table 4 Extended SCSI Messages ........................................................................... 8
Table 5 Parity Error Cases ....................................................................................... 9
Table 6 IN Phase During Which ATN is Raised #1........................................... 12
Table 7 IN Phase During Which ATN is Raised #2........................................... 13
Table 8 Exception Actions and Action Codes .................................................... 14
Table 9 SCSI Command Set................................................................................... 24
Table 10 SCSI 6-Byte Command Descriptor Block Data Format ....................... 27
Table 11 SCSI 10-Byte Command Descriptor Block — Data Format ................ 27
Table 12 Command Descriptor Block — Field Descriptions.............................. 28
Table 13 Operation Code Format — Data Format............................................... 28
Table 14 Operation Code Format—Field Descriptions....................................... 28
Table 15 Control Byte Format ................................................................................. 29
Table 16 Control Byte Format —Field Descriptions............................................ 29
Table 17 Status Byte Format.................................................................................... 30

Tables
LTO-2 SCSI Interface Guide x
Table 18 Status Byte Field Descriptions ................................................................ 30
Table 19 Status Codes .............................................................................................. 31
Table 20 ERASE Command Descriptor Block — Data Format.......................... 32
Table 21 ERASE Command Descriptor Block — Field Descriptions................ 32
Table 22 ERASE Command Completion Status................................................... 34
Table 23 INQUIRY Command Descriptor Block — Data Format ..................... 36
Table 24 INQUIRY Command Descriptor Block — Field Descriptions ........... 36
Table 25 Standard Inquiry Data Page — Data Format........................................ 39
Table 26 Standard Inquiry Data Page — Field Descriptions.............................. 40
Table 27 Supported Vital Product Data Inquiry Page — Data Format ............ 42
Table 28 Supported Vital Product Data Inquiry Page —Field Descriptions ... 43
Table 29 Unit Serial Number Page (80h) — Data Format................................... 45
Table 30 Unit Serial Number Page (80h) —Field Descriptions.......................... 45
Table 31 Device Identification Page (83h) — Data Format................................. 46
Table 32 Device Identification Page (83h) — Field Descriptions....................... 46
Table 33 Identification Descriptor — Data Format.............................................. 47
Table 34 Identification Descriptor — Field Descriptions.................................... 47
Table 35 Drive Component Revision Levels Pages (C0h, C1h) — Data
Format ........................................................................................................ 48
Table 36 Drive Component Revision Levels Pages (C0h, C1h) — Field
Descriptions............................................................................................... 49
Table 37 Drive Component Serial Number Page (C2, C3, C4, C5, C6h)
— Data Format .......................................................................................... 50
Table 38 Drive Component Serial Number Page (C2, C3, C4, C5, C6h)
—Field Descriptions ................................................................................. 50
Table 39 Drive Status Page (DFh) — Data Format .............................................. 52
Table 40 Drive Status Page (DFh) — Field Descriptions .................................... 53
Table 41 Drive State Field Values........................................................................... 57
Table 42 Cartridge Type Field Values ................................................................... 58
Table 43 Command Support Data — Data Format ............................................. 59

Tables
LTO-2 SCSI Interface Guide xi
Table 44 Command Support Data — Field Descriptions ................................... 59
Table 45 INQUIRY Command Completion Status.............................................. 61
Table 46 LOAD UNLOAD Command Descriptor Block — Data Format........ 62
Table 47 LOAD UNLOAD Command Descriptor Block — Field
Descriptions............................................................................................... 62
Table 48 Medium Loadable Position ..................................................................... 64
Table 49 Medium Auxiliary Memory Accessible Position ................................. 65
Table 50 Medium Loaded and Ready Position .................................................... 66
Table 51 LOAD UNLOAD Command Completion Status................................. 67
Table 52 LOCATE Command Descriptor Block — Data Format ...................... 69
Table 53 LOCATE Command Descriptor Block — Field Descriptions ............ 70
Table 54 LOCATE Command Completion Status ............................................... 71
Table 55 LOG SELECT Command Descriptor Block — Data Format .............. 73
Table 56 LOG SELECT Command Descriptor Block — Field Descriptions .... 74
Table 57 Log Page Header — Data Format .......................................................... 75
Table 58 Log Page Header — Field Descriptions ................................................ 76
Table 59 Log Parameter — Data Format............................................................... 76
Table 60 Log Parameter — Field Descriptions..................................................... 77
Table 61 Supported Log Pages ............................................................................... 78
Table 62 LOG SELECT Command Completion Status ....................................... 80
Table 63 LOG SENSE Command Descriptor Block — Data Format................. 81
Table 64 LOG SENSE Command Descriptor Block — Field Descriptions....... 82
Table 65 Supported Log Pages ............................................................................... 84
Table 66 Log Page Header — Data Format .......................................................... 85
Table 67 Log Page Header — Field Descriptions ................................................ 86
Table 68 Log Parameter — Data Format............................................................... 86
Table 69 Log Parameter — Field Descriptions..................................................... 87
Table 70 Supported Log Pages Log Page (00h) — Data Format........................ 88
Table 71 Supported Log Pages Log Page (00h) — Field Descriptions.............. 89

Tables
LTO-2 SCSI Interface Guide xii
Table 72 Write Error Counters Log Page (02h) Page and Parameter
Descriptions............................................................................................... 91
Table 73 Read Error Counters Log Page (03h) Page and Parameter
Descriptions............................................................................................... 92
Table 74 Sequential Access Device Log Page (0Ch) Page and Parameter
Descriptions............................................................................................... 93
Table 75 Device Statistics Log Page (14h) Page and Parameter
Descriptions............................................................................................... 94
Table 76 Device Statistics Log Page (14h) Parameter Code................................ 95
Table 77 Tape Diagnostic Data Log Page (16h) — Page Descriptions.............. 96
Table 78 Tape Diagnostic Data Log Page (16h) Parameter Header .................. 97
Table 79 Tape Diagnostic Data Log Page (16h) Parameter Header — Field
Descriptions............................................................................................... 98
Table 80 Tape Alert Log Page (2Eh) Page Information..................................... 100
Table 81 Supported TapeAlert Flags ................................................................... 101
Table 82 Drive Conditions Setting/Clearing TapeAlert Flags ........................ 105
Table 83 Media Error to TapeAlert Correlation................................................. 108
Table 84 Table Heading Descriptions and Abbreviations................................ 110
Table 85 Tape Usage Log Page (30h) — Page and Parameter
Descriptions............................................................................................. 111
Table 86 Tape Capacity Log Page (31h) — Page and Parameter
Descriptions............................................................................................. 112
Table 87 Compression Log Page (32h) — Page and Parameter
Descriptions............................................................................................. 113
Table 88 Error Events Log Page (33h) — Page Description ............................. 114
Table 89 Error Events Log Page (33h) — Parameter Header — Data
Format ...................................................................................................... 115
Table 90 Error Events Log Page (33h) — Parameter Header — Field
Descriptions............................................................................................. 116
Table 91 LOG SENSE Command Completion Status........................................ 118
Table 92 MODE SELECT 6-Byte Command Descriptor Block — Data
Format ...................................................................................................... 120
Table 93 MODE SELECT 6-Byte Command Descriptor Block — Field

Tables
LTO-2 SCSI Interface Guide xiii
Descriptions............................................................................................. 120
Table 94 MODE SELECT 10-Byte Command Descriptor Block — Data
Format ...................................................................................................... 121
Table 95 MODE SELECT 10-Byte Command Descriptor Block — Field
Descriptions............................................................................................. 122
Table 96 MODE SELECT 6-Byte CDB Mode Parameter Header — Data
Format ...................................................................................................... 123
Table 97 MODE SELECT 6-Byte CDB Mode Parameter Header — Field
Descriptions............................................................................................. 123
Table 98 MODE SELECT 10-Byte CDB Mode Parameter Header — Data
Format ...................................................................................................... 124
Table 99 MODE SELECT 10-Byte CDB Mode Parameter Header — Field
Descriptions............................................................................................. 125
Table 100 MODE SELECT Parameter List Block Descriptor — Data
Format ...................................................................................................... 126
Table 101 MODE SELECT Parameter List Block Descriptor — Field
Descriptions............................................................................................. 126
Table 102 Mode Parameter Pages .......................................................................... 127
Table 103 Mode Parameter Page — Data Format................................................ 127
Table 104 Mode Parameter Page Field Descriptions........................................... 128
Table 105 Disconnect/Reconnect Mode Page (02h) — Data Format................ 129
Table 106 Disconnect/Reconnect Mode Page (02h) — Field Descriptions...... 130
Table 107 Control Mode Page (0Ah) — Data Format ......................................... 131
Table 108 Control Mode Page (0Ah) —Field Descriptions ................................ 131
Table 109 Data Compression Control Mode Page (0Fh) — Data Format ........ 133
Table 110 Data Compression Control Mode Page (0Fh) — Field
Descriptions............................................................................................. 134
Table 111 Sequential Access Device Configuration Mode Page (10h)
— Data Format ........................................................................................ 136
Table 112 Sequential Access Device Configuration Mode Page (10h)
— Field Descriptions .............................................................................. 137
Table 113 Informational Exceptions Mode Page (1Ch) — Data Format........... 140
Table 114 Informational Exceptions Mode Page (1Ch) —Field

Tables
LTO-2 SCSI Interface Guide xiv
Descriptions............................................................................................. 140
Table 115 Drive Capabilities Control Mode Page (21h) — Data Format.......... 143
Table 116 Drive Capabilities Control Mode Page (21h) — Field
Descriptions............................................................................................. 143
Table 117 Interface Control Mode Page (22h) — Data Format .......................... 146
Table 118 Interface Control Mode Page (22h) — Field Descriptions ................ 147
Table 119 MODE SELECT Command Completion Status ................................. 150
Table 120 MODE SENSE Command 6-Byte Command Descriptor Block
— Data Format ........................................................................................ 151
Table 121 MODE SENSE Command 6-Byte Command Descriptor Block
— Field Descriptions .............................................................................. 152
Table 122 MODE SENSE Command 10-Byte Command Descriptor Block
— Data Format ........................................................................................ 153
Table 123 MODE SENSE Command 10-Byte Command Descriptor Block
— Field Descriptions .............................................................................. 154
Table 124 6-Byte CDB Mode Parameter Header — Data Format...................... 156
Table 125 6-Byte CDB Mode Parameter Header — Field Descriptions............ 156
Table 126 10-Byte CDB Mode Parameter Header — Data Format.................... 157
Table 127 10-Byte CDB Mode Parameter Header — Field Descriptions.......... 158
Table 128 Block Descriptor — Data Format.......................................................... 159
Table 129 Block Descriptor — Field Descriptions................................................ 159
Table 130 Mode Parameter Pages .......................................................................... 160
Table 131 MODE SENSE Command Completion Status.................................... 161
Table 132 PARK UNPARK Command Descriptor Block — Data Format ....... 162
Table 133 PARK UNPARK Command — Field Descriptions............................ 162
Table 134 PARK UNPARK Command Completion Status................................ 163
Table 135 PREVENT ALLOW MEDIUM REMOVAL Command
Descriptor Block — Data Format.......................................................... 164
Table 136 PREVENT ALLOW MEDIUM REMOVAL Command
Descriptor Block — Field Descriptions................................................ 165
Table 137 PREVENT ALLOW MEDIUM REMOVAL — Completion
Status ........................................................................................................ 166

Tables
LTO-2 SCSI Interface Guide xv
Table 138 READ Command Descriptor Block — Data Format ......................... 168
Table 139 READ Command Descriptor Block — Field Descriptions ............... 168
Table 140 READ Command —Completion Status .............................................. 175
Table 141 READ BLOCK LIMITS Command Descriptor Block — Data
Format ...................................................................................................... 177
Table 142 READ BLOCK LIMITS Command —Field Descriptions.................. 177
Table 143 READ BLOCK LIMITS Returned Data — Data Format ................... 178
Table 144 READ BLOCK LIMITS Returned Data — Field Descriptions ......... 178
Table 145 READ BLOCK LIMITS Command Completion Status..................... 179
Table 146 READ BUFFER Command Descriptor Block — Data Format ......... 180
Table 147 READ BUFFER Command Descriptor Block — Field
Descriptions............................................................................................. 180
Table 148 READ BUFFER Header Descriptor — Data Format.......................... 182
Table 149 READ BUFFER Header Descriptor — Field Descriptions................ 182
Table 150 READ BUFFER Descriptor — Data Format........................................ 183
Table 151 READ BUFFER Descriptor — Field Descriptions.............................. 183
Table 152 Echo Buffer Descriptor — Data Format............................................... 183
Table 153 Echo Buffer Descriptor — Field Descriptions..................................... 184
Table 154 MAM Page Identification ...................................................................... 185
Table 155 READ BUFFER Completion Status...................................................... 186
Table 156 READ POSITION Command Descriptor Block —Data Format ..... 187
Table 157 READ POSITION Command Descriptor Block —Field
Descriptions............................................................................................. 187
Table 158 Read Position Data — Long and TCLP Bits Set To 0 — Data
Format ...................................................................................................... 189
Table 159 READ POSITION Data — Long and TCLP Bits Set To 0
— Field Descriptions .............................................................................. 190
Table 160 READ POSITION Data — Long and TCLP Bits Set To 1
— Data Format ........................................................................................ 191
Table 161 READ POSITION Data — Long and TCLP Bits Set To 1
— Field Descriptions .............................................................................. 192

Tables
LTO-2 SCSI Interface Guide xvi
Table 162 READ POSITION Completion Status.................................................. 193
Table 163 RECEIVE DIAGNISTOC RESULTS Command Descriptor
Block — Data Format ............................................................................. 194
Table 164 RECEIVE DIAGNISTOC RESULTS Command Descriptor
Block — Field Descriptions....................................................................194
Table 165 Returned Data Format If PCV Is Not Set ............................................ 196
Table 166 Field Descriptions If PCV Is Not Set.................................................... 196
Table 167 Returned Data If PCV Set ...................................................................... 197
Table 168 Returned Data If PCV Set, Page Code = 81h ...................................... 197
Table 169 Field Descriptions — PCV Not Set....................................................... 198
Table 170 RECEIVE DIAGNISTIC RESULTS Completion Status ..................... 200
Table 171 RELEASE UNIT 6-Byte Command Descriptor Block — Data
Format ...................................................................................................... 201
Table 172 RELEASE UNIT 6-Byte Command — Field Descriptions................ 202
Table 173 RELEASE UNIT 10-Byte Command Descriptor Block —
Data Format ............................................................................................. 202
Table 174 RELEASE UNIT 10-Byte Command — Field Descriptions .............. 203
Table 175 RELEASE UNIT COMMAND — Completion Status ....................... 204
Table 176 REPORT DENSITY SUPPORT Command Descriptor Block
— Data Format ........................................................................................ 205
Table 177 REPORT DENSITY SUPPORT Command Descriptor Block
— Field Descriptions .............................................................................. 205
Table 178 REPORT DENSITY SUPPORT Header — Data Format ................... 206
Table 179 REPORT DENSITY SUPPORT Header — Field Descriptions ......... 206
Table 180 REPORT DENSITY SUPPORT Data Block Descriptor
— Data Format ........................................................................................ 207
Table 181 REPORT DENSITY SUPPORT Data Block Descriptor – Field
Descriptions............................................................................................. 208
Table 182 REPORT DENSITY SUPPORT Completion Status............................ 210
Table 183 REPORT LUNS Command Descriptor Block — Data Format......... 211
Table 184 REPORT LUNS Command Descriptor Block — Field
Descriptions............................................................................................. 212

Tables
LTO-2 SCSI Interface Guide xvii
Table 185 REPORT LUNS Header Data — Data Format.................................... 212
Table 186 REPORT LUNS Header Data — Field Descriptions.......................... 213
Table 187 REPORT LUNS Completion Status...................................................... 214
Table 188 REQUEST SENSE Command Descriptor Block — Data Format..... 216
Table 189 REQUEST SENSE Command Descriptor Block — Field
Descriptions............................................................................................. 216
Table 190 Returned Sense Data — Data Format .................................................. 217
Table 191 Returned Sense Data — Field Descriptions ........................................ 218
Table 192 Sense Key Values .................................................................................... 222
Table 193 Additional Sense Codes and Code Qualifiers .................................... 231
Table 194 REQUEST SENSE Command Completion Status.............................. 242
Table 195 RESERVE UNIT 6-Byte Command Descriptor Block — Data
Format ...................................................................................................... 243
Table 196 RESERVE UNIT 6-Byte Command Descriptor Block — Field
Descriptions............................................................................................. 244
Table 197 RESERVE UNIT 10-Byte Command Descriptor Block — Data
Format ...................................................................................................... 244
Table 198 RESERVE UNIT 10-Byte Command Descriptor Block — Field
Descriptions............................................................................................. 245
Table 199 RESERVE UNIT Completion Status..................................................... 246
Table 200 REWIND Command DesMcriptor Block — Data Format................ 247
Table 201 REWIND Command Descriptor Block — Field Descriptions.......... 248
Table 202 REWIND Command Completion Status............................................. 249
Table 203 SEND DIAGNOSTIC Command Descriptor Block — Data
Format ...................................................................................................... 250
Table 204 SEND DIAGNOSTIC Command Descriptor Block — Field
Descriptions............................................................................................. 251
Table 205 Diagnostic Page Format......................................................................... 252
Table 206 Supported Diagnostic Pages ................................................................. 252
Table 207 Memory Test Pattern Diagnostic Page — Data Format .................... 253
Table 208 Memory Test Pattern Diagnostic Page — Field Descriptions .......... 253

Tables
LTO-2 SCSI Interface Guide xviii
Table 209 SEND DIAGNOSTIC Command Completion Status........................ 254
Table 210 SET CAPACITY Command Descriptor Block — Data Format........ 256
Table 211 SET CAPACITY Command Descriptor Block — Field
Descriptions............................................................................................. 257
Table 212 SET CAPACITY Command Completion Status................................. 258
Table 213 SPACE Command Descriptor Block — Data Format........................ 260
Table 214 SPACE Command Descriptor Block — Field Descriptions.............. 261
Table 215 SPACE Command Completion Status................................................. 263
Table 216 TEST UNIT READY Command Descriptor Block — Data
Format ...................................................................................................... 265
Table 217 TEST UNIT READY Command Descriptor Block Field
Descriptions............................................................................................. 266
Table 218 TEST UNIT READY Completion Status.............................................. 266
Table 219 VERIFY Command Descriptor Block — Data Format ...................... 268
Table 220 VERIFY Command Descriptor Block — Field Descriptions ............ 269
Table 221 VERIFY Command Completion Status ............................................... 270
Table 222 WRITE Command Descriptor Block — Data Format........................ 272
Table 223 WRITE Command Descriptor Block — Field Descriptions.............. 272
Table 224 WRITE Command Completion Status................................................. 274
Table 225 WRITE BUFFER Command Descriptor Block — Data Format........ 276
Table 226 WRITE BUFFER Command Descriptor Block — Field
Descriptions............................................................................................. 276
Table 227 Write Buffer Data Header — Data Format ......................................... 279
Table 228 Write Buffer Data Header — Field Descriptions ............................... 279
Table 229 WRITE BUFFER Completion Status .................................................... 280
Table 230 WRITE FILEMARKS Command Descriptor Block — Data
Format ...................................................................................................... 281
Table 231 WRITE FILEMARKS Command Descriptor Block — Field
Descriptions............................................................................................. 281
Table 232 WRITE FILEMARKS Completion Status ............................................ 282

LTO-2 SCSI Interface Guide xix
Preface
This document describes the SCSI interfaces for the LTO-2 tape drive.
Audience This guide is designed for use by software engineers who have a basic
understanding of SCSI principles and technology.
Purpose This manual describes the SCSI specifications for the LTO-2 tape drive.
For drive-specific installation and operational information, including
connector information, refer to the Installation Guide or Product Manual
for the specific model of your drive.
Document
Organization This guide is organized as follows:
•Chapter 1, SCSI Interface discusses SCSI interface operation as it
relates to drive function.
•Chapter 2, SCSI Commands, lists the SCSI Commands detailed in this
manual along with their operation codes. It also describes the format
of Command Descriptor Blocks, Operation Codes, the Control Byte,
and the Status Byte. It describes in detail all the SCSI commands

Preface
LTO-2 SCSI Interface Guide xx
supported by the LTO-2 tape drive. Each command is described, its
Command Descriptor Block (CDB) is illustrated, and the Completion
Status is given.
•Appendix A, Message Codes
This guide concludes with an index.
Conventions Used
In This Manual0
This manual uses the following conventions:
•Notes:
• 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
Note: Notes emphasize important information related to the
main topic.