User Manual

SCSI Commands Reference Manual, Rev. J 414
www.seagate.com Parameters for direct access devices
IO ADVICE HINTS MODE field
The IO ADVICE HINTS MODE field specifies the mode of the logical block markup descriptor and is described in table 389.
CS_ENBLE bit
The cache segment enable (CS_ENBLE) bit specifies whether cache segments (see SBC-4) are associated with the cache ID that is the group
number associated with this IO advice hints descriptor. If the CS_ENBLE bit is set to zero, then no independent cache segments are associated
with the cache ID for the group number associated with this IO advice hints descriptor. If the CS_ENBLE bit is set to one, then independent
cache segments are associated with the cache ID for the group number associated with this IO advice hints descriptor.
IC_ENABLE bit
The information collection enable (IC_ENABLE) bit specifies whether the group’s information collection function (see 2.2.8) is enabled. If the
IC_ENABLE bit is set to zero, then the information collection function is not enabled. If the IC_ENABLE bit is set to one, then the information col-
lection function is enabled.
If the Group Statistics and Performance (n) log pages are not supported, then in the IO advice hints group descriptors for group 0 to group 31,
the IC_ENABLE bit shall be set to zero and shall not be changeable.
In the IO advice hints group descriptors for group 32 to group 63, the IC_ENABLE bit shall be set to zero, and shall not be changeable.
LOGICAL BLOCK MARKUP DESCRIPTOR field
The logical block markup descriptor is described in SBC-4.
Table 389 IO ADVICE HINTS MODE field
Code Description
00b
The logical block markup descriptor is valid (see 2.2.8).
01b
The logical block markup descriptor is invalid (see 2.2.8).
All others
Reserved