User's Guide

3-5
Configuring the Adaptec SCSI Card 39320D with SCSISelect
Boot Device Configuration – Non-BBS Systems Only
■ Select Master SCSI Controller—(Default: A First) Specifies
which of the two SCSI channels the boot device is connected to
(if the computer boots from a SCSI device). If you change this
setting, the change automatically applies to both SCSI channels.
■ Boot SCSI ID—(Default: 0) Specifies the SCSI ID of your boot
device. We recommend that you do not change the default
setting. If you change this setting, the change automatically
applies to both SCSI channels.
■ Boot LUN Number—(Default: 0) Specifies which LUN (Logical
Unit Number) to boot from on your boot device. This setting is
not valid unless Multiple LUN Support is enabled (see Advanced
Configuration Options on page 3-7). If you change this setting,
the change automatically applies to both SCSI channels.
SCSI Device Configuration Options
SCSI Device Configuration options can be set individually for each
connected SCSI device.
Note: To configure settings for a SCSI device, you must know
its SCSI ID (see Using SCSI Disk Utilities on page 3-15).
■ Sync Transfer Rate—(Default: 320) Determines the maximum
synchronous data transfer rate that the SCSI card supports. We
recommend that you leave the maximum (default) value of
320 MB/sec.
■ Packetized—(Default:Yes ) Packetized protocol is required to
operate at 320 MB/sec. When enabled, this option is available if
it is implemented in the device drivers. However, this option is
not supported by the BIOS.
■ QAS—(Default:Ye s) Quick Arbitration and Selection reduces
the overhead of control release on the SCSI bus from one device
to another. This improvement reduces command overhead and
maximizes bus utilization. When enabled, this option is
available if it is implemented in the device drivers. However,
this option is not supported by the BIOS.
ASC-39320D UG.book Page 5 Monday, July 22, 2002 1:42 PM