Table of Contents
Advertisement
CHAPTER 4
Command Specifications
4.1 Control/Sense Commands
4.1.15 LOG SELECT (4C)
Bit
7
Byte
0
1
0
2
PC
3
0
4
0
5
0
6
0
7
8
9
0
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 parameters 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 in Table 4.39.
C141-C009
6
5
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Parameter List Length (MSB)
Parameter List Length (LSB)
0
0
0
4.1 Control/Sense Commands
3
2
X'4C'
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
PCR
SP
0
0
0
0
0
0
0
0
0
0
0
0
4-87
Advertisement
Table of Contents
