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PCR Parameter Code Reset. If this bit is set to 1 and the parameter list length is
set to 0, all accumulated values of page codes 2, 3, and 32 are set to 0 and
all threshold values are set to default. If PCR is set to 1 and the parameter
list length is set to a non-zero value, the command terminates with a CHECK
CONDITION status with sense key of ILLEGAL REQUEST and an additional
sense code (ASC) of INVALID FIELD IN CDB.
SP Save Page. Not supported, must be set to 0. If for some reason the Save
Page bit is set, the command terminates with a CHECK CONDITION status
with a sense key of ILLEGAL REQUEST and an ASC of INVALID FIELD IN
CDB.
PC Page Control. This field defines the type of parameter values to be selected:
00b Current Threshold Values
01b Current Cumulative Values
10b Default Threshold Values
11b Default Cumulative Values
All of these types of values are changeable using LOG SELECT.
• When the PC field is set to 00b or 01b and the Parameter List Length is
set to 0, the command terminates with a CHECK CONDITION status,
Sense Key of ILLEGAL REQUEST, and ASC of INVALID FIELD IN
CDB. This occurs because modification of Current Threshold Values
and Current Cumulative Values is not supported.
• When the PC field is set to 10b and the Parameter List Length field is
set to 10b, then all Current Threshold Values are reset to the Default
Threshold Values. This is equivalent to no change, since
• When the PC field is set to 11b and the Parameter List Length field is
set to 0, then all Current Cumulative Values are reset to the Default
Cumulative Values. This is equivalent to clearing all log pages that can
be cleared.
Parameter List
Length This field specifies the length, in bytes, of the LOG SELECT parameter list to
be transferred from the initiator to the target during the DATA OUT phase. A
parameter list length of 0 indicates that no data is to be transferred. This
condition is not considered an error.
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