User Manual

SCSI Commands Reference Manual, Rev. J 376
www.seagate.com Parameters for direct access devices
5.3 Mode parameters
5.3.1 Mode parameters overview
This subclause describes the mode parameter headers, block descriptors, and mode pages used with MODE SELECT command
(see 3.9 and 3.10) and MODE SENSE command (see 3.11 and 3.12) that are applicable to all SCSI devices. Subpages are identical
to mode pages except that they include a SUBPAGE CODE field that further differentiates the mode page contents. Mode pages
specific to each device type are described in the command standard that applies to that device type.
NOTE Many of the mode parameters in the following pages are changeable. A MODE SENSE command with
the PC bit set to one will return a mask indicating the mode parameters that may be changed by a
SCSI initiator port. Seagate disk drive product manuals indicate which pages a drive supports, what
the default mode values are, and what mode parameters may be changed.
Table 359 defines the mode pages that are applicable to all device types that implement the MODE SELECT and MODE SENSE
commands.
Table 359 Mode page codes and subpage codes
Page code Subpage code Mode Page Name Reference
0Ah
02h
Application Tag
5.3.6
1Ch
01h
Background Control
5.3.7
0Ah
06h
Background Operation Control
5.3.8
08h
00h
Caching
5.3.9
0Ah
03h
Command Duration Limit A
5.3.10
0Ah
04h
Command Duration Limit B
5.3.11
0Ah
00h
Control
5.3.12
0Ah
01h
Control Extension
5.3.13
02h
00h
Disconnect-Reconnect for FC
5.3.14
02h
00h
Disconnect-Reconnect for SAS
5.3.15
03h
00h
Format Device mode page (Obsolete)
5.3.16
0Ah
05h
IO Advice Hints Grouping
5.3.17
1Ch
00h
Informational Exceptions Control
5.3.18
1Ch
02h
Logical Block Provisioning
5.3.19
1Ah
00h
Power Condition
5.3.20
1Ah
01h
Power Consumption
5.3.21
01h
00h
Read-Write Recovery
5.3.22
18h
00h
Logical Unit Control (FC)
5.3.23
18h
00h
Logical Unit Control (SAS)
5.3.24
19h
00h
Protocol Specific Port (FC)
5.3.25
19h
00h
Protocol Specific Port (SAS)
5.3.26
19h
01h
Phy Control and Discover
5.3.27
[a] Valid only for the MODE SENSE command