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SCSI Commands
Quantum DLT 8000 Tape System 5-71
5.9 MODE SELECT Command (6) / (10) (15h / 55h)
The MODE SELECT command (available in either 6- or 10-byte format) enables the host
to configure the tape drive. Implementing MODE SELECT and MODE SENSE requires
“handshaking” between the host and the drive. Before configuring the drive, the host
should issue a MODE SENSE command to the drive to obtain a report of the current
configuration and determine what parameters are configurable. The host interprets this
information and then may issue MODE SELECT to set the drive to the host’s preferred
configuration. The Mode Parameter List described in Section 5.8 is passed from the
initiator to the drive during the command’s DATA OUT phase.
Information for the drive is carried on a number of pages, each of which serves to set the
tape drive’s operating parameters. The MODE SELECT pages supported, and the
sections of this manual that details each page, are:
Page Code Description Described in Section…..
01h READ/WRITE Error Recovery Page 5.9.2
02h Disconnect / Reconnect Page 5.9.3
0Ah Control Mode Page 5.9.4
0Fh Data Compression Page 5.9.5
10h Device Configuration Page 5.9.6
11h Medium Partition Page 5.9.7
1Ch TapeAlert Page 5.9.8
3Eh EEPROM Vendor Unique Page 5.9.9
Except for mode page 3Eh, the tape drive always powers up with its default
configurations set. This is also true if the drive receives a BUS DEVICE RESET message
or a hard reset via the RST line on the SCSI bus.
The Command Descriptor Block is illustrated in Figure 5-34.
NOTE
For a list of changeable parameters within MODE SELECT, refer to Sections 5.9.9
(EEPROM Vendor Unique Page 3Eh) and 5.9.10.
- 8000 Tape System 1
- Product Manual 1
- Table of Contents 10
- REVISION HISTORY 27
- Revision History 28
- Quantum DLT 8000 Tape System 28
- ABOUT THIS MANUAL 33
- CONVENTIONS 35
- FOR MORE INFORMATION 35
- READER COMMENTS 35
- About This Manual 36
- Chapter 1 37
- 1.3 SPECIFICATIONS 38
- 1.3.4 Reliability (Projected) 41
- 1.3.5 Physical Specifications 41
- 1.3.7 Operating Air Velocity 43
- 1.3.9 Altitude 45
- 1.3.10 Acoustic Emissions 46
- 1.3.12 Power Requirements 47
- 1.3.13 Current Requirements 48
- TAPE SYSTEM 55
- 2.2.1 Setting the SCSI ID 58
- 2.2.2 Setting TERM PWR 60
- Front Bezel 61
- 2.3.1 Selecting SCSI ID 71
- SCSI Connectors (2) 72
- 220 / 240 V 74
- AC Power Cord Connector 75
- 2.4 The Tape Cartridge 76
- 2.4.4 Loading a Cartridge 82
- 2.4.5 Unloading a Cartridge 84
- 2.5.1 Unload Button 88
- 2.5.3 Selecting Density 89
- 2.9 Troubleshooting 99
- SCSI DESCRIPTION 103
- 3.2 SCSI Commands 104
- SCSI Description 105
- 3.3 Signal States 107
- 3.4 SCSI Signals 109
- 3.4.2 Signal Bus Timing 110
- 3.5 SCSI Bus Phases 113
- Bus Free Sequence 114
- 3.5.2 ARBITRATION Phase 115
- Arbitration Sequence 115
- 3.5.3 SELECTION Phase 116
- Selection Sequence 116
- Selection Time-Out 117
- 3.5.4 RESELECTION Phase 117
- Reselection Sequence 117
- SCSI ID bit 118
- Reselection Time-Out 120
- 3.6 SCSI Bus Conditions 128
- 3.6.2 Reset Condition 129
- 3.6.3 Queued Unit Attentions 130
- Chapter 4 131
- MESSAGES 131
- Messages 132
- 4.2 Supported SCSI Messages 135
- 4.2.12 NO OPERATION (08h) 141
- SCSI COMMANDS 145
- SCSI Commands 146
- 5.1.1 SCSI Pointers 147
- 5.1.3 Status/Error Reporting 151
- (Continued) 153
- 5.3 ERASE Command (19h) 159
- 5.4 INQUIRY Command (12h) 161
- 5.6 LOCATE Command (2Bh) 179
- 5.7 LOG SELECT Command (4Ch) 181
- Page Code Page Description 183
- 02h Write Error Counter Page 183
- 03h Read Error Counter Page 183
- 32h Compression Ratio Page 183
- LOG PAGE HEADER 184
- LOG PARAMETERS 185
- (continued) 186
- 5.8 LOG SENSE Command (4Dh) 189
- Descriptions (continued) 196
- 5.8.5 TapeAlert Page (2Eh) 200
- TAPE ALERT LOG PAGE HEADER 200
- TAPE ALERT LOG PARAMETERS 201
- Descriptions 210
- 5.9.1 Mode Parameter List 217
- 5.9.8 TAPEALERT PAGE (1Ch) 237
- FORCEDENSITY parameter to 4 247
- 5.10.3 MODE SENSE Mode Pages 258
- Data Field Description 284
- 5.14 READ Command (08h) 304
- 5.16.2 Data Mode 311
- 5.16.3 Descriptor Mode 311
- 5.26 REWIND Command (01h) 353
- 5.28 SPACE Command (11h) 360
- 5.30 VERIFY Command (13h) 363
- 5.31 WRITE Command (0Ah) 364
- 5.32.2 Write Data Mode (010b) 368
- INFORMATION 373
- Appendix B 377
- B.2 Bugcheck Packets 378
- B.2.1 POST Failure Packets 379
- B.2.2 Event Log Packets 379
- UPDATING THE FIRMWARE 381
- 1. POST passed 383
- 2. The drive is unloaded 383
- THE LIBRARY PORT 387
- CARTRIDGES 389
- Cartridge 391
- SYSTEM SCSI COMMANDS 397
- DLT 7000 EMULATION FEATURE 399
- SCSI Bus Differences 403
- Front Panel Differences 405
- *81-60118-04 A01* 408
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