Informational Exceptions Control Page (Page Code = 1C) - Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications

4.1.10

Informational exceptions control page (page code = 1C)

The page descriptor format of this MODE SELECT parameter is shown in Figure 4.9.
Bit
Byte
0
1
2
Default
Variable
3
Default
Variable
4-7
Default
Variable
8-11
Default
Variable
Figure 4.11 MODE SELECT parameters: informational exception control
This page specifies whether the drive failure prediction function is enabled or disabled and the reporting
method when a drive failure is predicted.
The log errors bit (LogErr) of zero indicates that the logging of informational exception conditions
within a target is vendor specific. A LogErr bit of one indicates the target logs informational exception
conditions.
A Test bit of one creates a false device failure at the next interval time, if the DExcpt bit is not set.
When the Test bit is one, the MRIE and Report count fields apply as if the Test bit were zero. The false
device failure is reported with an additional sense code of FAILURE PREDICTION THRESHOLD
EXCEEDED [=50-FF]. If both the Test and the DExcpt bits are one, the device server terminate the
MODE SELECT command with CHECK CONDITION status. The sense key is set to ILLEGAL
REQUEST [=5] with the additional sense code set to INVALID FIELD IN PARAMETER LIST [=26-
00]. A Test bit of zero instructs the device server not to generate any false device faulure notifications.
A disable exception control (DExcpt) 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.
C141-C010
7 6 5
0 0 0
Page length (X'0A')
Perf 0 EBF
0 0 0
1 0 1
0 0 0
0 0 0
0 0 0
4 3 2
1 1 1
EWASC DExcpt Test
0 1 0
1 1 1
0 MRIE
0 0 0
0 0 1
Interval Timer
X'00000000'
X'FFFFFFFF'
Report Count
X'00000001'
X'FFFFFFFF'
4.1 Mode Parameters
1 0
0 0
0 LogErr
0 0
0 1
0 0
1 1
4-43