Fujitsu MBA3073RC SERIES Technical Manual page 323

Disk drives serial attached scsi interface specifications
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f.
EBACKERR (Enable Background Error)
"0":
"1":
However, the reporting means is determined depending on the value of the
"MRIE" bit, and the values in the Interval timer and Report Count fields are
ignored.
This bit is valid when the EWASC bit is set to "1". Owing to this, if the
EWASC bit is set to "0", error reporting will not be executed, even if the
EBACKERR bit is set to "1".
g.
Perf (performance)
This bit of zero indicates that informational exception operations that are the
cause of delays are acceptable. A Perf bit of one indicates the target is not cause
delays while doing informational exception operations. A Perf bit set to one may
cause the target to disable some or all of the informational exceptions operations,
thereby limiting the reporting of informational exception conditions.
h.
MRIE (method of reporting informational exceptions)
This field indicates the methods that is used by the target to report
informational exception conditions. The priority of reporting multiple
informational exceptions is vendor specific.
C141-C013
Background self-test and Background Scan errors are not reported.
Background self-test and Background Scan errors are reported.
5.1 Mode Parameters
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