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DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-21
DU
Disable Update. This bit is not defined for LOG
SELECT; the drive ignores any value in DU.
DS
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.
TSD
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.
ETC
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.
TMC
Threshold Met Criteria. See
Table 4-16 on page 4-28
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.
LP
List Parameter. This bit should always be 0 to indicate
that parameter codes are treated as data counters.
Parameter Length
This field specifies the number of bytes of the parameter value.
Parameter Value
This field is the actual value of this log parameter.
Table 4-12.
LOG SELECT Log Page Parameters — Field Descriptions
(Continued)
Field Name
Description
Summary of Contents for DLT1/VS80 SCSI
Page 1: ...DLT1 VS80 SCSI Interface Guide...
Page 6: ...DLT1 VS80 SCSI Interface Guide vi July 2004 81 81276 01 Rev A01 Notes...
Page 12: ...Table of Contents xii July 2004 81 81276 01 Rev A01 Notes...
Page 16: ...List of Figures xiv July 2004 81 81276 01 Rev A01 Notes...
Page 20: ...List of Tables xviii July 2004 81 81276 01 Rev A01 Notes...
Page 24: ...Chapter 1 Introduction 1 4 July 2004 81 81276 01 Rev A01 Notes...
Page 32: ...Chapter 2 General SCSI Bus Operation 2 8 July 2004 81 81276 01 Rev A01 Notes...
Page 42: ...Chapter 3 SCSI Messages 3 10 July 2004 81 81276 01 Rev A01 Notes...
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