User Manual

SCSI Commands Reference Manual, Rev. J 413
www.seagate.com Parameters for direct access devices
5.3.17 IO Advice Hints Grouping mode page (0Ah/05h)
The IO Advice Hints Grouping mode page(see table 387) provides the application client with the means to obtain or modify the
IO advice hints of the logical unit and the group number associated with those IO advice hints.
The mode page policy (see
SPC-5) for this page shall be shared.
PS bit, SPF bit, PAGE CODE field, SUBPAGE CODE field, and PAGE LENGTH field
The parameters saveable (PS) bit, the subpage format (SPF) bit, the PAGE CODE field, the SUBPAGE CODE field, and the PAGE LENGTH field are
defined in 5.3.5 and shall be set to the values shown in table 387 for the IO Advice Hints Grouping mode page.
The format of each IO advice hints group descriptor is shown in table 388. There is one IO advice hints group descriptor for each
group number. The logical block markup descriptor (see
SBC-4) in each IO advice hints group descriptor affects the processing of
commands as described in 2.2.8.
Table 387 IO Advice Hints Grouping mode page
Bit
Byte
7 6 5 4 3 2 1 0
0 PS SPF (1b) PAGE CODE (0Ah)
1 SUBPAGE CODE(05h)
2 (MSB)
PAGE LENGTH (40Ch)
3 (LSB)
4
Reserved. . .
15
IO advice hints for group descriptor list
16
IO advice hints for group descriptor (group 0) . . .
31
. . . . . .
1024
IO advice hints for group descriptor (group 63) . . .
1039
Table 388 IO advice hints group descriptor
Bit
Byte
7 6 5 4 3 2 1 0
0 IO ADVICE HINTS MODE Reserved CS_ENABLE IC_ENABLE
1
Reserved. . .
3
4 (MSB)
LOGICAL BLOCK MARKUP DESCRIPTOR (see SBC-4). . .
p-1 (LSB)
p
PAD (if any). . .
15