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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.
Summary of Contents for DLTtape DLT 4000
Page 1: ...DLT 4000 Tape Drive Product Manual November 10 2003 81 60043 04 ...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued ...
Page 6: ......
Page 24: ...About This Manual Quantum DLT 4000 Tape Drive xxiv ...
Page 62: ...Hardware Implementation 2 28 Quantum DLT 4000 Tape Drive ...
Page 100: ...Messages 4 12 Quantum DLT 4000 Tape Drive ...
Page 264: ...SCSI Commands 5 164 Quantum DLT 4000 Tape Drive ...
Page 274: ...Appendix B EEPROM Resident Bugcheck and Event Logs B 6 Quantum DLT 4000 Tape System ...
Page 280: ...Appendix C Updating the Firmware C 6 Quantum DLT 4000 Tape Drive ...
Page 298: ...Index Index 6 Quantum DLT4000 Tape Drive ...
Page 299: ......