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b. TEST
"1":
"0":
The value of this bit cannot be saved, and the stored value is fixed at 0. The
current value is initialized to 0 when power is turned on or when LIPyx or
TARGET RESET is received.
c.
DExcpt (disable exception control)
This bit of zero indicates information exception operations is enabled. The
reporting of information exception conditions when the "DExcpt" bit is set to
zero is determined from the method of reporting informational exceptions
field. A "DExcpt" bit of one indicates the target disables all information
exception operations. The method of reporting informational exceptions field
is ignored when "DExcpt" is set to one.
d. EWASC (enable warning)
This bit of zero indicates the target disables reporting of the warning. The
"MRIE" field is ignored when "DExcpt" is set to one and "EWASC" is set to
zero. An "EWASC" bit of one indicates warning reporting is enabled. The
method for reporting the warning when the "EWASC" bit is set to one is
determined from the "MRIE" field.
e.
EBF (enable background function)
If background functions are supported, this bit of one indicates the target
enables background functions. An "EBF" bit of zero indicates the target
disables the functions.
f.
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.
g. 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-C012
If "0" is set for DExcpt, a failure prediction is reported with a failure
prediction reporting condition that is generated when the time
specified with Interval Timer has elapsed.
The method and number of times of this reporting are determined
according to the specifications in the MRIE and Report Count fields.
At this time, the sense key of 0x5D and additional sense code of 0xFF
are reported.
This specifies that the test of the failure prediction function and its
reporting method be disabled.
4.1 Control/Sense Commands
4-67
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