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LOG SENSE
Page Code: The Page Code field identifies which log page is being requested by the initiator. If the page is not
supported then the command will terminate with a CHECK CONDITION status with the sense key set to ILLEGAL
REQUEST and an additional sense code of INVALID FIELD IN CDB.
Supported pages are:
Page Code
00h
02h
03h
07h
30h
31h
33h
34h
35h
39h
3Ch
Parameter Pointer: The Parameter Pointer field allows the host to specify at which parameter within a log page the
requested data should begin.
For example if a page supported parameters 0 through 5, and the Parameter Pointer field contained 3 then only
parameters 3, 4 and 5 would be returned to the initiator. Similarly, if a page supported parameters 1, 3 and 6, and the
Parameter Pointer field contained 2, then only parameters 3 and 6 would be returned to the initiator.
Note that parameters within a page are always returned in ascending order according to parameter code. If an
invalid parameter pointer is sent the drive will return CHECK CONDITION with the sense key set to ILLEGAL
REQUEST and an additional sense code of INVALID FIELD IN CDB.
Allocation Length: The Allocation Length field is used to inform the target how much space the initiator has
allocated for data. The drive will give a CHECK CONDITION because of this. It will return whatever host requests,
up to the total data. Note however that if this field is 0 then this is not considered an error and the device will just
return a GOOD STATUS.
6.6.1 The Log Page Descriptor
The format of the log pages consists of ZERO or more variable-length parameter structures. Each page begins with
a 4-byte page header followed by ZERO or more variable-length parameter structures defined for that page. The Log
Select command supports the ability to send ZERO or more log pages. The LOG SENSE command returns a single
log page as specified in the Page Code field of the CDB.
Bit
7
Byte
0
Reserved
1
2
(MSB)
3
4 - x+3
n-y n
SONY AIT-E Turbo drive SDX-250V series Ver.1.0
Table 6-7: Supported Log Pages
Description
Supported Log Pages
Write Error Counter Page
Read Error Counter Page
Last n Error Events Page
Tape Log Page (Sony Unique)
Tape Capacity Log Page
Drive Usage Page (Sony Unique)
Write Frame Error Counter Page
Read Frame Error Counter Page
Data Compression Transfer Log Page
AIT Log Page
Table 6-8: Log Page Format
6
5
Log Parameters(s)
The First Log Parameter (Length x)
The Last Log Parameter (Length y)
24h / 404h (404h–AIT mode )
4
3
Page Code
Reserve
Page Length (n-3)
.
.
.
6.Command Specification
Allocation Length
12h
20h
20h
1A8h (max)
5Ch
8Eh
3Ch
4Ch
5Ch
90h x Partition number +4
2
1
(LSB)
0
6-13
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