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SCSI Commands
Quantum DLT 4000 Tape Drive 5-73
MODE SELECT (6) / (10) Command (15h) / (55h) (continued)
Table 5–38 Disconnect / Reconnect Page - Field Descriptions
Field Name Description
PS Parameters Savable. For MODE SELECT, this bit must be 0.
Additional Page Length This field indicates the number bytes in the page. However, the value
does not include bytes 0 and 1. The length is returned in MODE
SENSE commands and must subsequently be set to the same value
when performing MODE SELECT. If the page length does not match
that expected by the drive, a CHECK CONDITION status is returned,
sense key set to ILLEGAL REQUEST.
The drive returns a CHECK CONDITION status with sense key set to
ILLEGAL REQUEST if it receives an unsupported Page Code or a Page
field with values not supported or changeable. In such cases, no
parameters are changed as a result of the command.
Buffer Full Ratio Not supported. Any value is ignored.
Buffer Empty Ratio Not supported. Any value is ignored.
Bus Inactivity Limit Not supported. Any value is ignored.
Disconnect Time Limit Not supported. Any value is ignored.
Connect Time Limit Not supported. Any value is ignored.
Maximum Burst Size This value specifies the maximum amount of data that will be
transferred without disconnecting. A value of 0 sets no limit. Any
value is in units of 512 bytes. For example, a value of 8 represents 4
Kbytes. Values that are not multiples of 8 are rounded up to the
closest multiple of 8.
- DLT™4000 Tape Drive 1
- Product Manual 1
- TABLE OF CONTENTS 7
- REVISION HISTORY 19
- Revision History 20
- Quantum DLT 4000 Tape Drive 20
- ABOUT THIS MANUAL 21
- CONVENTIONS 23
- READER COMMENTS 23
- About This Manual 24
- Chapter 1 25
- Tabletop Version 1 26
- Tabletop Version 2 26
- 1.2 PRODUCT FEATURES 27
- 1.3 PRODUCT SPECIFICATIONS 27
- 1.3.2 Interface Type 28
- 1.3.3 Storage Capacity 28
- 1.3.4 Performance Data 28
- 1.3.6 Power Requirements 31
- 1.3.9 Reliability (Projected) 32
- Chapter 2 35
- HARDWARE IMPLEMENTATION 35
- 2.1.1 Safety Precautions 36
- 2.1.2 Handling 36
- 2.2 DRIVE SETUP 37
- Hardware Implementation 39
- SCSI ID Pushbutton 41
- 2.3 DRIVE INSTALLATION 42
- 2.4 DRIVE CONNECTIONS 44
- Pin Number Signal Name 48
- 1 +12 VDC 48
- 2 Ground (+12 V return) 48
- 3 Ground (+5 V return) 48
- 4 +5 VDC 48
- Table 2–5 LED Functionality 52
- 2.5.2 Selecting Density 56
- 2.6 POWER ON SELF TEST (POST) 58
- 2.7 TROUBLESHOOTING 60
- Chapter 3 63
- SCSI DESCRIPTION 63
- SCSI Description 64
- 3.3 SIGNAL STATES 66
- Table 3–2 Signal Sources 67
- 3.4 SCSI SIGNALS 68
- 3.4.2 Signal Bus Timing 69
- 3.5 SCSI BUS PHASES 72
- • DISCONNECT 73
- • COMMAND COMPLETE 73
- 3.5.3 SELECTION Phase 75
- The initiator: 76
- The drive: 76
- 3.5.4 RESELECTION Phase 77
- Table 3–6 Status Bytes 85
- 3.6 SCSI BUS CONDITIONS 86
- 3.6.2 Reset Condition 87
- 3.6.3 Queued Unit Attentions 88
- Chapter 4 89
- MESSAGES 89
- 4.2 SUPPORTED SCSI MESSAGES 93
- Messages 100
- Chapter 5 101
- SCSI COMMANDS 101
- SCSI Commands 102
- 5.1.1 SCSI Pointers 103
- 5.1.3 Status/Error Reporting 107
- 5.2 SCSI COMMAND DESCRIPTIONS 113
- 5.3 ERASE COMMAND (19H) 115
- 5.4 INQUIRY COMMAND (12H) 117
- 5.6 LOCATE COMMAND (2BH) 130
- 5.7 LOG SELECT COMMAND (4CH) 132
- 5.7.2 Operation of LOG SELECT 134
- 5.8 LOG SENSE COMMAND (4DH) 139
- • A page is not supported 142
- • The SP bit is set to 1 142
- • PPC bit is set to 1 142
- (continued) 146
- 0000h – 000Fh) 156
- 0000h, 0001h, or 0002h) 159
- 5.9.1 Mode Parameter List 163
- 5.10.3 MODE SENSE Mode Pages 199
- Data Format 215
- 5.12 READ COMMAND (08H) 217
- 5.14.2 Data Mode 224
- 5.14.3 Descriptor Mode 224
- • A hard reset occurs 245
- 5.23 SPACE COMMAND (11H) 252
- 5.25 VERIFY COMMAND (13H) 255
- 5.26 WRITE COMMAND (0AH) 257
- 5.27.2 Write Data Mode (010b) 260
- Appendix A 265
- INFORMATION 265
- Appendix B 269
- B.2.1 POST Failure Packets 270
- B.2.2 Event Log Packets 271
- Appendix C 275
- UPDATING THE FIRMWARE 275
- • Examines the data 277
- Appendix D 281
- THE TAPE CARTRIDGE 281
- Reel Lock Opening 284
- Spring-Loaded Hub 285
- WRITE-PROTECTION 288
- D.4 LOADING A TAPE CARTRIDGE 290
- *81-60043-04 A01* 300
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