IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications page 124

PERF (Performance) bit is not used.
Method of Reporting Informational Exceptions indicates the methods used by the Target to report infor-
mational exception conditions.
Code Description
0h No reporting of informational exception condition: This method instructs the target to not report
informational exception condition.
1h Asynchronous event reporting: Not supported.
2h Generate unit attention: This method instructs the target to report informational exception con-
ditions by returning a CHECK CONDITION status on any command. The sense key is set to
UNIT ATTENTION and the additional sense code indicates the cause of the informational
exception condition. The command that has the CHECK CONDITION is not executed before
the informational exception condition is reported.
3h Conditionally generate recovered error: This method instructs the target to report informational
exception conditions, dependent on the value of the P E R bit of the error recovery parameters
mode page, by returning a CHECK CONDITION status on any command. The sense key is set
to RECOVERED E R R O R and the additional sense code indicates the cause of the informational
exception condition. The command that has the CHECK CONDITION completes without
error before any informational exception condition is reported.
4h Unconditionally generate recovered error: This method instructs the target to report informational
exception conditions, regardless of the value of the P E R bit of the error recovery parameters
mode page, by returning a CHECK CONDITION status on any command. The sense key is set
to RECOVERED E R R O R and the additional sense code indicates the cause of the informational
exception condition. The command that has the CHECK CONDITION completes without
error before any informational exception condition is reported.
5h Generate no sense: This method instructs the target to report informational exception conditions
by returning a CHECK CONDITION status on any command. The sense key is set to NO
SENSE and the additional sense code indicates the cause of the informational exception condi-
tion. The command that has the CHECK CONDITION completes without error before any
informational exception condition is reported.
6h Only report informational exception condition on request: This method instructs the target to pre-
serve the informational exception(s) information. To find out about information exception condi-
tions the Application Client polls the target by issuing an unsolicited REQUEST SENSE
command. The sense key is set to NO SENSE and the additional sense code indicates the cause
of the informational exception condition.
7h-Fh Reserved.
Interval Timer field indicates the period in 100 millisecond increments for reporting that an informational
exception condition has occurred. The target shall not report informational exception conditions more
frequently than the time specified by the Interval Timer field and as soon as possible after the time
interval has elapsed. After the informational exception condition has been reported the interval timer is
restarted. A value of zero in the Interval Timer field indicated that the target only reports the informa-
tional exception condition one time.
Report Count field indicates the number of times the target reports an informational exception condition
. The Report Count of ZERO indicates no limits on the number of times the target reports an informa-
tional exception condition.
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O E M Spec. of DDRS-3xxxx