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104
The Log Sense command and its Data In phase also use the format of Table 70, so explanations pertaining to
the table apply generally to both Log Select and Log Sense commands, with differences noted. However, only
one log page is selected and returned with each Log Sense command (see Section 5.9). This table is not
repeated in Section 5.9.
Table 70:
Log Page format
Bit
7
Byte
0
Reserved
1
Reserved
2
(MSB)
3
4 to
Log Parameter (First) [4]
x+3
(Length X bytes)
:
: [4]
n-Y
Log Parameter (Last) [4]
to n
(Length Y bytes)
Notes.
[1]
Page Codes implemented are given in Table 73.
[2]
The Page Length field gives the total number of bytes of Log Parameter structures that follow these first
four control block bytes. If the initiator sends a Page Length that results in the truncation of any parameter,
the target shall terminate the command with Check Condition status. The sense key shall be set to Illegal
Request with the additional sense code set to Invalid Field In Parameter List.
[3]
Most log pages contain one or more special data structures called Log Parameters. Log Parameters may
be data counters that record a count of a particular event (or events) or list parameters (strings) that con-
tain a description of a particular event. List parameters are not currently supported by the drives repre-
sented by this manual.
[4]
Each Log Parameter structure begins with a four-byte parameter header followed by one or more bytes of
parameter value data. Log Parameter structures are in the format given in Table 71.
6
5
Page Length (n-3) [2]
Log Parameter Structure(s) [3]
SCSI Interface Product Manual, Rev. J
4
3
Page Code [1]
2
1
(LSB)
0
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