User's Guide

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Adaptec SCSI Card 39320D User’s Guide for Floppy Disks (OEM)
■ Initiate Wide Negotiation—(Default: Yes ) Enables the SCSI
controller to initiate Wide Negotiation with the SCSI target.
When set to Yes, the SCSI card attempts 16-bit data transfer
(wide negotiation). When set to No, the SCSI card uses 8-bit
data transfer unless the SCSI device requests wide negotiation.
Note: Set Initiate Wide Negotiation to No if you are using
an 8-bit SCSI device that hangs or exhibits other
performance problems with 16-bit data transfer rate
enabled.
■ Enable Disconnection—(Default: Yes) When set to Yes, Enable
Disconnection allows the SCSI device to disconnect from the
SCSI bus. When set to No, the SCSI device cannot disconnect
from the SCSI bus. Leave the setting at Yes if two or more SCSI
devices are connected to the SCSI card. If only one SCSI device
is connected, changing the setting to No results in slightly better
performance.
■ Send Start Unit Command—(Default: Yes ) When set to Yes,
sends the Start Unit Command to the SCSI device at bootup.
This reduces the load on a computer’s power supply by
allowing the SCSI card to turn on SCSI devices one-by-one
when the computer boots; otherwise, all SCSI devices turn on at
the same time.
Note: Check the device documentation to make sure the
device supports the command. On most devices, you must
also change a switch or jumper setting on the device to
enable the device to respond to the command.
The following options have no effect if the SCSI card BIOS is
disabled. (The SCSI card BIOS is normally enabled by default.)
■ BIOS Multiple LUN Support—(Default: No) Leave this setting
at No if the device does not have multiple LUNs. When set to
Yes, the SCSI card BIOS provides boot support for a SCSI device
with multiple LUNs (for example, a CD “juke box” device in
which multiple CDs can be accessed simultaneously).
ASC-39320D UG.book Page 6 Monday, July 22, 2002 1:42 PM