Supported Log Pages - Sony AIT-SDX550 Product Specifications Manual

LOG SENSE
TSD: A target save disable (TSD) bit of ZERO indicates a target-defined method for saving log parameters. This
implicit saving operation shall be done frequently enough to insure that the cumulative parameter values retain
statistical significance (i.e. across power cycles). A TSD bit of one indicates that either the target does not provide a
target-defined method for saving log parameters or the target-defined method has been disabled by the initiator. If
the initiator sets both the DS and the TSD bits set to one, the target shall terminate the command with CHECK
CONDITION status . The sense key shall be set to ILLEGAL REQUEST with the additional sense code set to
INVALID FIELD IN PARAMETER LIST.
ETC: An enable threshold comparison (ETC) bit of one indicates that when the cumulative parameter value is
updated, it shall be compared to the threshold parameter value and the action specified by the TMC field shall be
taken. An (ET) bit of ZERO disables this comparison. The ET bit is the same for both the cumulative and threshold
log parameter. Thus when the ET bit is set to a value by the initiator, this value is returned for both the cumulative
and threshold values of the log parameter.
TMC: The threshold met criteria (TMC) field defines the binary relationship between the cumulative and threshold
log parameter values under which the threshold is met. If the ET bit is one and the threshold condition is met, a Unit
Attention condition shall be posted to all initiators. When reporting the unit attention condition, the target shall set the
sense key to UNIT ATTENTION, the additional sense code to LOG EXCEPTION, and the additional sense code
qualifier to THRESHOLD CONDITION MET.
The TMC field is the same for both the cumulative and threshold parameter. Thus when the TMC field is set to a
value by the initiator, this value is returned for both cumulative and threshold values of the log parameter.
LP: The LP bit field defines whether the parameter is a data counter or a list parameter. See the description of each
supported page below for information on the setting of this field.
Note: If any of the other bit-fields in the control byte are set then the command will terminate with a CHECK
CONDITION status with a sense key of ILLEGAL REQUEST and an additional sense code of INVALID FIELD IN
PARAMETER LIST

6.6.3. Supported Log Pages

The following log pages are supported:
Page Code
00h Supported Log Pages
02h Write Error Counter Page
03h Read Error Counter Page
07h Last n Error Events Page
2Eh TapeAlert Log Page
30h Tape Log Page (Sony Unique)
31h Tape Capacity Log Page
33h Drive Usage Log Page (Sony Unique)
34h Write Frame Error Counter Page
35h Read Frame Error Counter Page
39h Transfer Log Page
3Ch AIT Log Page
3Dh AIT Fixed Length Information Page for MIC
3Eh AIT Variable Length Information Page for MIC
SONY AIT-2 Turbo drive SDX-550V series Ver.1.0
Table 6-10: Threshold Met criteria
TMC Threshold Met Criteria
00b Any update of the parameter
01b Cumulative = Threshold
10b Cumulative < > Threshold
11b Cumulative > Threshold
Table 6-11: Supported Log pages
Description
6.Command Specification
Allocation Length
12h
20h
20h
1A8h (max.)
144h
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
6-15