Quantum DLT 8000 Product Manual page 186

SCSI Commands
LOG SELECT Command (4Ch) (continued)
Table 5–18 Log Parameters Field Descriptions (continued)
Field Name
Byte 2 of the Log Parameter Block is referred to as the Parameter Control Byte; it is
made up of six control bits plus one bit that is reserved.
DU
DS
TSD
ETC
5-42
Description
NOTE
Disable Update. This bit is not defined for LOG SELECT; the target
ignores any value in DU.
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.
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.
Enable Threshold Comparison. When set to 1, drive performs a
comparison with threshold values once the cumulative value is
updated. Comparison criteria is defined in Threshold Met Criteria
(TMC). If the comparison is met and the RLEC bit of MODE SELECT /
SENSE Control Page 0Ah 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.
Quantum DLT 8000 Tape System
(continued)