Seagate Medalist 2160N (ST52160N), Руководство по эксплуатации продукта

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time the cumulative value is updated. When the ETC bit is
0 no comparison is made. The ETC bit value is the same
for both the threshold and cumulative values.
The threshold met criteria (TMC) bit defines the basis for
comparison of the cumulative and threshold values. The
TMC field is valid only when ETC is 1. The codes used in
this field are listed below.
Code Basis for Comparison
00
B
Notify of every update of cumulative value
01
B
9
Cumulative value equal to threshold value
10
B
9
Cumulative value not equal to threshold value
11
B
9
Cumulative value greater than threshold value
If the ETC bit is 1
10
and the comparison result is true, a unit
attention condition is generated for all initiators. When
reporting the unit attention condition, the drive sets the
sense key to unit attention condition and the additional
sense code to threshold condition met.
The list parameter (LP) bit indicates the log parameter
format. When the LP bit is 0, the parameter is a data
counter. When the LP bit is 1, the parameter is a list
parameter (an ASCII string). The drive does not support list
parameters.
Data counters are associated with one or more events and
are incremented whenever one of the events occur. The
data counter may have a maximum value assigned to it. If
that value is reached, the drive sets the DU bit to 1. Setting
the DU bit to 1 causes all of the other counters in the log
page to cease counting. If the data counter reaches its
maximum value during the execution of a command, the
drive completes the command. Drive counter updates are
performed in the background. If the command completes
correctly and if the report log exception condition (RLEC)
bit in Control Mode Page 0A
H
is set to 1, the drive issues a
Unit Attention with the additional sense code set to Log
Counter at Maximum. The counters do not restart automat-
ically if the overflowed counter is reinitialized.
Byte 3 The parameter length field specifies the length in bytes of
the parameter that follows. If the initiator sends a parameter
9. Comparison made at every update of cumulative value.
10. The RLEC bit in Mode Page 0A
H
must also be 1.
Medalist Pro 2160N/2160WC Product Manual, Rev. A 81