User's Guide

A-3
Troubleshooting in Windows
2 Check with your video card/display adapter manufacturer to
see if your specific video card requires an IRQ allocation. Most
motherboard CMOS/BIOS setup utilities have an option to
disable the allocation of an IRQ to the AGP slot. Disable this
option only if you have verified that your video card does not
require an IRQ.
3 Verify that all IRQs not specifically required for ISA devices are
set to Available or PNP ISA/PCI in the motherboard
CMOS/BIOS setup utility.
4 Verify that all devices not being used are disabled so that the
resources they are being allocated can be freed up for allocation
to another device. This is accomplished through the
motherboard CMOS/BIOS setup utility. For example, if you are
not using the onboard COM/Serial port on your motherboard,
you can usually disable this chipset and free up the IRQ it is
currently being assigned.
What if I have devices that are showing up at the wrong speed
(usually slower) when the BIOS scans the SCSI bus during boot?
■ Make sure you are using the terminated cable supplied with
your Adaptec kit.
■ Do not mix Ultra320/160 devices and any other speed devices
on the same SCSI cable. All Ultra320/160 devices need to be on
a single cable. Adding a slower device will slow down all the
devices on the same cable.
■ Be sure you have the connection firmly seated. A bad
connection on a disk drive or other devices can cause problems
talking to that device as the maximum speed.
■ Try to route the cable inside the system as smoothly as possible.
Avoid bending, flexing, or stretching the cable inside your
system.
■ If you are not booting from the SCSI card (your boot hard disk
drive is not attached to the card) then the BIOS on the card
should be disabled.
ASC-39320D UG.book Page 3 Monday, July 22, 2002 1:42 PM