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Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
194
• Method of Reporting Informational Exceptions indicates the methods used by the Target to report informational excep-
tion conditions.
Code Description
0h No reporting of informational exception condition: This method instructs the Target to not report infor-
mational exception condition.
1h Asynchronous event reporting: Not supported.
2h Generate unit attention: 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 Unit Attention and the addi-
tional 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 excep-
tion conditions, dependent on the value of the PER bit of the error recovery parameters mode page, by
returning a Check Condition status on any command. The sense key is set to Recovered Error and the addi-
tional 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 excep-
tion conditions, regardless of the value of the PER bit of the error recovery parameters mode page, by return-
ing a Check Condition status on any command. The sense key is set to Recovered Error 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 return-
ing 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 condition. The command that has the Check Condi-
tion completes without error before any informational exception condition is reported.
6h Only report informational exception condition on request: This method instructs the Target to preserve
the informational exception(s) information. To find out about information exception conditions the Applica-
tion 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 informa-
tional exception condition has been reported the interval timer is restarted. A value of zero or 0xFFFFFFFF in the
Interval Timer field indicates that the target only reports the informational exception condition one time and will
override the value set in the Report Count field.
• 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 informational exception condition.