Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
137
19.6 LOG SELECT (4C)
Table 116: Log Select (4C)
The LOG SELECT command provides a means for the Initiator to clear statistical information maintained by the drive and
reported via the LOG SENSE command.
•
PCR
The Parameter Code Reset determines whether the Log Sense parameters will be cleared and unit attention posted
for all other Initiators. A value of 1 indicates that the parameters be cleared, while a value of zero (except when PC =
11b) indicates that the parameters not be cleared. Parameter list length must be zero when PCR is 1. The PC field is
ignored for list parameters, i.e. when the Format and Linking (F&L) field contains 01b or 11b.
•
SP
The Save Parameters bit value of zero indicates that the page parameters not be saved. A value of 1 indicates that the
page parameters that are savable be saved after they have been changed. SP bit MUST be 1 if parameter list length is
greater than zero. Otherwise it will result in a
Check Condition
status being returned. The sense key shall be set to
Illegal Request
and additional sense code of
Invalid Field in CDB
.
•
PC
The Page Control field defines the type of parameters to be selected. The PC field set to 11b (and PCR is then a don't
care) indicates that the Default Cumulative values are set to their default values of 0. If the PC field is set to 01b and
PCR is set to 1, the Current Cumulative values are also set to their default values of 0.
Parameter List Length MUST be zero when PC = 11b. Otherwise the command is terminated and a
Check Condition
status is returned. The sense key shall be set to
Illegal Request
and additional sense code of
Invalid Field in CDB
.
•
Parameter List Length
The Parameter List Length field specifies the length in bytes of the parameter list that shall be
located in the DATA OUT buffer. A parameter list length zero indicates that no pages shall be transferred.
Note:
A specified length greater than 0x00FF will result in a
Check Condition
status being returned. A length that results in
log data being truncated will generate a
Check Condition
status.
Note:
For page 0Fh, the maximum parameter list length supported is 4004h (4 bytes for the header and 100h bytes for each
of the 40h parameters that are supported). The Parameter List Length must be an integral of the number of parameters plus the
4 byte header. (Ex: Parameter length =104h for one parameter, 204h for 2 parameters,... 4004h for all 40h parameters).
The drive allows updates to the current cumulative values only. A value of zero is acceptable and is not considered an error.
The drive updates only pages 0Eh, the Start/Stop Cycle page and 0Fh, the Application Client page. For other pages the param-
eters are ignored. If the data out buffer contains multiple pages then the application client should send the pages in ascending
order. If the data out buffer contains multiple log parameters within a page,all log parameters within the page should be sent
Byte
Bit
7
6
5
4
3
2
1
0
0
Command Code = 4Ch
1
Reserved = 0
Reserved = 0
PCR
SP
2
PC
Reserved = 0
3
4
5
6
Reserved = 0
7
8
(MSB) Parameter List Length = 0
(LSB)
9
Reserved = 0
FLAG
LINK
Содержание Ultrastar 15K450
Страница 18: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 2 ...
Страница 20: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 4 ...
Страница 22: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 6 ...
Страница 30: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 14 ...
Страница 32: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 16 ...
Страница 34: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 18 ...
Страница 44: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 28 ...
Страница 52: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 36 1 4 6 2 0 8 101 6 0 25 FRO NT LEFT 25 8 0 3 ...
Страница 60: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 44 ...
Страница 62: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 46 ...
Страница 65: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 49 Korea MIC Taiwan BSMI ...
Страница 66: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 50 ...
Страница 68: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 52 ...
Страница 118: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 102 ...
Страница 130: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 114 ...
Страница 180: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 164 ...
Страница 299: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 283 ...
Страница 322: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 306 ...
Страница 324: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 308 ...
Страница 387: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 371 ...
Страница 392: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 376 ...
Страница 416: ...Hitachi Ultrastar 15K450 FC AL Hard Disk Drive Specification 398 WRITE SAME 41 302 Z zero seeks 161 ...