The Log Page Descriptor 6 - Sony AIT-SDX550 Product Specifications Manual

LOG SENSE
Supported pages are:
Page Code
00h Supported Log Pages
02h Write Error Counter Page
03h Read Error Counter Page
07h Last n Error Events Page
2Eh Tape Alert Log Page
30h Tape Log Page (Sony Unique)
31h Tape Capacity Log Page
33h Drive Usage Page (Sony Unique)
34h Write Frame Error Counter Page
35h Read Frame Error Counter Page
39h Data Compression Transfer Log Page
3Ch AIT Log Page
3Dh AIT Fixed Length Information Page for MIC
3Eh AIT Variable Length Information Page for MIC
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.
SONY AIT-2 Turbo drive SDX-550V series Ver.1.0
Table 6-7: Supported Log Pages
Description
6.Command Specification
Allocation Length
12h
20h
20h
1A8h (max)
144h (max)
5Ch
24h/404h (404h–AIT mode )
8Eh
3Ch
4Ch
5Ch
90h x Partition number +4
334h–MIC phase 1
37Ch–AIT mode 2k MIC
4a8h–AIT mode 8k MIC
n
6-13