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x Ending Boundary
This field is valid in the MODE SENSE command. This field indicates the ending of the
active notch or, if the active notch is zero, the ending of the logical unit (IDD).
x Page Notch
This is a bit map which shows whether or not other mode pages are being changed if the device
is notched. The most significant bit of this field corresponds to page code 3Fh and the least
significant bit corresponds to page code 00h. If it is specified, the IDD disregards this value.
4.1.9 Informational exceptions control page (page code = 1C)
The page descriptor format of this MODE SELECT parameter is shown in Figure 4.8.
Bit
Byte
76543210
0 00011100
1 Page length (X’0A’)
2 Perf 0 EBF EWASC DExcpt Test 0 LogErr
Default00001000
Variable10111101
3 0000 MRIE
Default00000000
Variable00000111
4-7 Interval Timer
Default
X‘00000000’
Variable
X‘FFFFFFFF’
8-11 Report Count
Default
X‘00000001’
Variable
X‘FFFFFFFF’
Figure 4.8 MODE SELECT parameters: informal exception control page
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