Quantum DLT 1 Interface Manual page 71

Table 4-16.
Field Name
Parameter Control Byte
81-81276-01 Rev A01
Read / Write Error LOG SENSE Parameters (Pages 02h and 03h) — Field
Descriptions (Continued)
Description
DU, DS, TSD, ETC, TMC, LBIN, and LP are collectively referred to as the
Parameter Control Byte.
DU
DS
TSD
ETC
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.
Disable Save. Since the tape drive does not support
saving parameters, this bit is always 1.
Target Save Disable. Since the tape drive does not
support saving parameters, this bit is always 1.
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.
July 2004
DLT1/VS80 SCSI Interface Guide
4-29