Quantum 10K II - Manual (Page 160)

SCSI Description
Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives 5–93
MODE SELECT (6) Command (15h) (continued)
Table 5–43 Quantum-Unique Page — Field Descriptions (continued)
Field Default Description
SSSIE 0 Software Selectable SCSI ID Enable. When this field = 0, the disk
drive’s SCSI ID is determined via the disk drive’s hardware ID
select jumper settings.
When this field = 1, the disk drive’s SCSI ID setting is
determined by the value set in the Software Selectable SCSI ID
field (Byte 3, bits 0 – 3).
Disable Auto WRITE 0 When this field = 0, the Auto WRITE function is enabled.
When this field = 1, the Auto WRITE function is disabled.
Disable Auto READ 0 When this field = 0, the Auto WRITE function is enabled.
When this field = 1, the Auto WRITE function is disabled.
Delay Spin 0 When this field = 0, Delay Spin is not enabled.
When this field = 1, and Staggered Spin Delay (Bytes 6 & 7) is
enabled, the three lower bits of the disk drive’s SCSI ID are used
for the multiplier to determine the length of the delay. When
only three bits are used, disk drives 0 through 7 and drives 8
through 15 have the same corresponding delays since the
fourth bit is not used (disk drive 0 has the same delay as disk
drive 8, disk drive 1 has the same delay as disk drive 9, and so
on).
Software Selectable SCSI ID 0 When SSSIE (Byte 3, bit 7) = 1, this field determines the disk
drive’s SCSI ID. When changing SCSI ID via the MODE SELECT
command, the SCSI ID changes after the next reset or power
cycle. If at initial power on the SSSIE bit is set to 1 (the bit’s
previous setting was saved to disk) the Software Selectable SCSI
ID field’s value determines the disk drive’s SCSI ID.
Reselection Retries 7 The value of this field specifies the number of reselection
attempts the drive will make to the initiator. A value of 0
indicates an infinite number of reselection attempts.
ERSS 0 Enable Rotational Position Locking (RPL) Sector
Synchronization. Not used by the drive.
Stagger Spin 0 When the value of this field =1, the Stagger Spin Delay field
(Bytes 6 & 7) is in effect. The disk drive operates as if its Spin
Delay jumper was installed.
(continued)