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4.1 Mode Parameters
C141-E167 4 - 33
• Starting Boundary
This field is enabled by the MODE SENSE command. This field indicates the beginning of the
active notch or, if the active notch is zero, the beginning of the logical unit (IDD).
• 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).
• 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.