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C141-E124-01EN3 - 52
3.1.16 LOG SELECT (4C)
Bit
Byte
76543210
1X'4C'
2LUN000PCRSP
3 PC 000000
400000000
500000000
600000000
7 Parameter List Length (MSB)
8 Parameter List Length (LSB)
9000000FlagLink
This command provides a means for an application client to manage statistical information
maintained by the IDD about IDD. The INIT can know the types of statistical information and the
current maintaining of each statistical information by using the LOG SENSE command.
A "Save Parameters (SP)" bit is one indicates that after performing the specified LOG SELECT
operation the drive will save all parameters to the disc medium. A "SP" bit of zero specifies that
parameters is not saved. It is not an error to set the "SP" bit to one and to set the DS bit of a log
parameter to one. In this case, the parameter value for that log parameter is not saved.
The "Parameter Code Reset (PCR)" bit of one and a "Parameter list length" of zero cause all
implemented parameters to be set to zero. It also clears the SMART Failure Warning and the
Thermal Warning. If the "PCR" bit is one and the parameter list length is greater than zero, the
command is terminated with CHECK CONDITION status(ILLEGAL REQUEST [=5] / INVALID
FIELD IN CDB [=24-00]). In this case, the log paramters are not cleared. A PCR bit of zero
specifies that the log parameters is not reset.
The "Page Control (PC)" bits specifies a kind and treatment content of parameters that changed by
this command as shown below.
Value Description
00b Current threshold values
01b Current cumulative values
10b Default threshold values
11b Default cumulative values