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SCSI Commands: 21BLOG SENSE
3.9.3.1
3.9.3.2
3.9.3.3
3.9.3.4
Log Page Header
Bits
Byte
7
0
Reserved
1
2
(MSB)
3
Log Page Field Descriptions
Field
Bytes
Bits
Page
0
0-5
Code
Page
2-3
Length
Reserved
Log Parameter
Bits
Byte
7
0
(MSB)
1
2
DU
3
4 – n
Log Parameter Field Descriptions
Field
Bytes
Bits
Parameter
0-1
Code
Disable
2
7
Update
(DU)
Disable
2
6
Save (DS)
TSD
2
5
ETC
2
4
TMC
2
2-3
List Binary
2
1
(LBIN)
6
5
4
Reserved
Page Length
Description
Identifies the page being returned.
Indicates the length of the page in bytes that follow the page header. If
the allocation length specified in the CDB is too small to transfer the
entire requested page, this value is not adjusted to reflect the
truncation. However, if the Parameter Pointer field specifies a starting
parameter code other than zero, the page length is adjusted to
indicate the number of bytes that follow the page header.
All reserved bits must be 0.
6
5
4
Parameter Code
DS
TSD
ETC
Parameter Length
Parameter Value
Description
Identifies the log parameter returned. Log Parameters are always
returned in ascending order.
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.
Always 1, indicating that the drive does not support Save Page in LOG
SENSE and LOG SELECT.
Always 0, indicating that Target Save Disable (TSD) is not supported.
Always 0, indicating that Enable Threshold Comparison (ETC) is not
supported.
Always 0, indicating that Threshold Met Criteria (TMC) is not
supported.
Always 0, indicating that all log parameters are data counters.
Page 51
3
2
1
Page Code
3
2
1
TMC
LBIN
0
(LSB)
0
(LSB)
LP
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