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The SP bit works as it does in the LOG SELECT command. It provides the option
for the initiator to save all log parameters, identified as savable by the DS bit, of the
specified log page to the disk after the LOG SENSE operation has been performed.
The PC (page control) field defines the type of parameter values to be selected (see
Table 5.18). The parameter values returned by a LOG SENSE command are
determined as the following priority list :
1.
The last updated parameter values.
2.
The saved values are returned if an update has not occurred since the last
power-on, hard RESET condition, or BUS DEVICE RESET message.
3.
The default values are returned if an update has not occurred since the last
power-on, hard RESET condition, or BUS DEVICE RESET message and
saved values are not available.
The Page code field specifies which log page is requested from the drive.
A reserved or not implemented page code requested by the initiator will cause the
drive to terminate the command with CHECK CONDITION status. The sense key
will be set to ILLEGAL REQUEST and the additional sense code will be INVALID
FIELD IN CDB.
The parameter pointer field is used by the initiator to request log parameters
beginning from a specific parameter code to the maximum allocation length or the
maximum parameter code supported by the drive, whichever is less. If the value of
the parameter pointer field is larger than the largest supported parameter code of
the specified log page, the drive will terminate the command with CHECK
CONDITION status.
additional sense code will be INVALID FIELD IN CDB.
Log parameters within the specified log page will be returned in ascending
parameter code order.
The Log Sense page format is as described in the LOG SELECT command (section
5.3).
LOG SENSE:(4Dh)
5 COMMAND DESCRIPTIONS
The sense key will be set to ILLEGAL REQUEST and the
OEM MANUAL:K6602924
Revision: 1 / Date: 2003.03.06
Page: 116 / 273
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