Parameter Control Byte; Table 60 Log Parameter - Field Descriptions - Quantum LTO 2 User Manual

Table 60 Log Parameter —
Field Descriptions

Parameter Control Byte

LTO-2 SCSI Interface Guide
Field Bytes
Parameter 0-1
Code
Disable
Update
(DU)
Disable
Save (DS)
Parameter
Length
Parameter 4 - n
Value
Reserved
The parameter header contains a 2-byte parameter code to identify the
2
parameter, a Parameter Control byte, and a parameter length byte.
All of the bits in byte 2 of the Log Parameter are collectively referred to as
the Parameter Control byte. The Parameter Control byte specifies counter
controls.
Bits Description
Identifies the log parameter. Log
Parameters are always in ascending
order.
2 7 0 = Enables update of accumulated
value when the corresponding event
occurs.
1 = Disables update of all accumulated
values within a log page when the
corresponding event occurs. The drive
sets this bit to indicate that the
accumulated value of the parameter
has reached its maximum value so that
the drive can no longer increment any
Parameter Values.
2 6 Always 1, indicating that the drive does
not support Save Page in
and
LOG SELECT
3 n – 3, indicating the length of the
Parameter Value.
Actual data.
Always 0.
Chapter 2 SCSI Commands
LOG SELECT Command
LOG SENSE
.
77