Mode select (6) command (15h) (continued) – Quantum 10K II User Manual
Page 145
SCSI Description
5–78
Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives
MODE SELECT (6) Command (15h) (continued)
Table 5–37 Control Mode Page — Field Descriptions (continued)
Field Value
Default
Description
DQue
0
Disable Queue. When set to the default value of 0, the drive
supports tagged command queuing.
When the Disable Queue bit is set to 1, tagged command
queuing is disabled. A subsequent tagged message from
the initiator is rejected with a MESSAGE REJECT message
and the I/O process is executed as an untagged command.
EECA
0
AEN enabled.
RAC
0
Report A Check Condition bit. Ignored by the drive.
RAERP
0
Ready AER Permission. Not supported by the drive.
UAAERP
0
Unit Attention AER Permission. Not supported by the
drive.
EAERP
0
Error AER Permission. Not supported by the drive.
Ready AER Holdoff Period
0
Not supported by the drive.
Busy Timeout Period
FFFFh
Not supported by the drive.
NOTES: 1. If the Queue Algorithm Modifier specifies restricted re-ordering (0000b), commands
are not allowed to execute concurrently. If this field specifies unrestricted re-ordering
(0001b), concurrent I/O execution is allowed.
2. Fully supported and temporary fields are underlined. Unsupported fields are not
underlined. The PS bit is underlined, meaning it will be set on a MODE SENSE
command, since the page is savable