Quantum DLT 1 Interface Manual page 63

Table 4-12. LOG SELECT Log Page Parameters — Field Descriptions (Continued)
Field Name
Parameter Length
Parameter Value
81-81276-01 Rev A01
Description
DU
DS
TSD
ETC
TMC
LP
This field specifies the number of bytes of the parameter value.
This field is the actual value of this log parameter.
July 2004
Disable Update. This bit is not defined for LOG
SELECT; the drive ignores any value in DU.
Disable Save. Saving parameters is not supported. Set
both DS and TSD to 1. If the DS and/or TSD are 0, the
command is terminated with CHECK CONDITION
status, with the Sense Key set to ILLEGAL REQUEST,
with the Additional Sense Code set to INVALID
FIELD IN PARAMETER LIST.
Target Save Disable. Saving parameters is not
supported. Set both DS and TSD to 1. If the DS and/or
TSD are 0, the command is terminated with CHECK
CONDITION status, with the Sense Key set to
ILLEGAL REQUEST, with the Additional Sense Code
set to INVALID FIELD IN PARAMETER LIST.
Enable Threshold Comparison. When set to 1, the tape
drive performs a comparison with threshold values
after updating the cumulative value. Comparison
criteria are defined in TMC. If the comparison is met
and the RLEC bit of MODE SELECT/SENSE Control
Page is 1, then a UNIT ATTENTION is generated for
all initiators. The Additional Sense Code is set to LOG
EXCEPTION and the Additional Sense Code Qualifier
is THRESHOLD CONDITION MET. If the RLEC bit
is 0 and the comparison is met, then UNIT
ATTENTION is not generated.
Threshold Met Criteria. See
for the list of criteria. After the specified criteria in this
field is met, the ETC bit is 1, and the RLEC bit in
MODE SENSE/SELECT Control Page is 1, then the
UNIT ATTENTION message is generated for all
initiators.
List Parameter. This bit should always be 0 to indicate
that parameter codes are treated as data counters.
DLT1/VS80 SCSI Interface Guide
Table 4-16 on page 4-28
4-21