User Manual

SCSI Commands Reference Manual, Rev. J 500
www.seagate.com Parameters for direct access devices
5.4.14 Mode Page Policy VPD page (87h)
The Mode Page Policy VPD page (see table 472) indicates which mode page policy (see table 3.9) is in effect for each mode page supported by
the logical unit.
PERIPHERAL QUALIFIER field and the PERIPHERAL DEVICE TYPE field
The PERIPHERAL QUALIFIER field and the PERIPHERAL DEVICE TYPE field are defined in standard INQUIRY data (see 3.6.2).
PAGE CODE field
The PAGE CODE field is defined in SPC-5 and shall be set to the value defined in table 472.
PAGE LENGTH field
The PAGE LENGTH field indicates the length of the mode page policy descriptor list. The relationship between the PAGE LENGTH field and the
CDB ALLOCATION LENGTH field is defined in 2.2.6.
Each mode page policy descriptor (see table 473) contains information describing the mode page policy for one or more mode pages or
subpages (see 5.3.5). The information in the mode page policy descriptors in this VPD page shall describe the mode page policy for every
mode page and subpage supported by the logical unit.
Table 472 Mode Page Policy VPD page
Bit
Byte
7 6 5 4 3 2 1 0
0 PERIPHERAL QUALIFIER PERIPHERAL DEVICE TYPE
1 PAGE CODE (87h)
2 (MSB)
PAGE LENGTH (n-3)
3 (LSB)
Mode page policy descriptor list
4
Mode page policy descriptor [first] (see table 473). . .
7
. . . . . .
n-3
Mode page policy descriptor [last] (see table 473). . .
n
Table 473 Mode page policy descriptor
Bit
Byte
7 6 5 4 3 2 1 0
0 Reserved POLICY PAGE CODE
1 POLICY SUBPAGE CODE
2 MLUS Reserved MODE PAGE POLICY
3 Reserved