DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-29
Parameter Control Byte
DU, DS, TSD, ETC, TMC, LBIN, and LP are collectively referred to as the
Parameter Control Byte.
DU
Disable Update. A value of 0 indicates that target
updates all log parameter values. A value of 1 indicates
that target does not update the log parameter values
except in response to LOG SELECT. The tape drive
sets this bit when accumulated values reach maximum.
The host also returns this bit set if the host set the bit in
the last LOG SELECT command. The default is 0.
Note
: For parameter types other than threshold and
cumulative values, the DU bit is always 0.
DS
Disable Save. Since the tape drive does not support
saving parameters, this bit is always 1.
TSD
Target Save Disable. Since the tape drive does not
support saving parameters, this bit is always 1.
ETC
Enable Threshold Comparison. ETC of 1 indicates that
comparison to threshold is performed. ETC of 0
indicates that this comparison is not performed. This bit
is 1 by LOG SELECT command. Default is 0.
Table 4-16.
Read / Write Error LOG SENSE Parameters (Pages 02h and 03h) — Field
Descriptions
(Continued)
Field Name
Description
Summary of Contents for DLTtape DLT1
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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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