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SCSI Commands
Quantum DLT 4000 Tape Drive 5-37
LOG SELECT Command (4Ch) (continued)
Table 5–18 LOG SELECT Log Parameters Field Descriptions (continued)
Field Name Description
Parameter Code
(continued)
Note: Parameter codes 00h, 01h, and 04h always have a value of 0.
Parameter value for 05h is 8 bytes; the parameter length is set to 8.
DU Disable Update. This bit is not defined for LOG SELECT; the target ignores any
value in DU.
DS Disable Save. Not supported. DS and Target Save Disable (TSD) must be set to
1. If DS and/or TSD are set to 0, command terminates with CHECK CONDITION
status, sense key set to ILLEGAL REQUEST, and additional sense code set to
INVALID FIELD IN PARAMETER LIST.
TSD Target Save Disable. Not supported. TDS and DS must be set to 1. If TSD and/or
DS are set to 0, command terminates with CHECK CONDITION status, sense
key set to ILLEGAL REQUEST, and additional sense code set to INVALID FIELD
IN PARAMETER LIST.
ETC Enable Threshold Comparison. When set to 1, drive performs a comparison
with threshold values once the cumulative value is updated. Comparison
criteria are defined in Threshold Met Criteria (TMC). If the comparison is met
and the RLEC bit of MODE SELECT / SENSE Control Page is set to 1, then a UNIT
ATTENTION is generated for all initiators. The additional sense code is set to
THRESHOLD CONDITION MET. If the RLEC bit is 0 and the comparison is met,
then UNIT ATTENTION is not generated.
TMC Threshold Met Criteria. Once the criteria specified in this field is met and the
ETC bit is 1 and the RLEC bit in MODE SENSE / SELECT Control Page is set to 1,
then UNIT ATTENTION is generated for all initiators.
The criteria for comparison are:
Code - Basis of Comparison
00b - Every update of the cumulative value
01b - Cumulative value equal to threshold value
10b - Cumulative value not equal to threshold value
11b - Cumulative value greater than threshold value
The Default Threshold Values are the maximum values that each parameter
can attain.
- 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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