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Troubleshooting Checklist
Most problems that occur with your host adapter result
from errors in preparing and connecting devices on the
SCSI bus. If you have problems when using your host
adapter, check these items first.
Are all SCSI devices powered?
Are all SCSI bus cables and power cables properly
connected?
Is the host adapter firmly seated and secured in a PCI
expansion slot?
Is pin-1 orientation maintained throughout the SCSI
bus? (See Step 6 on page 4.)
Do the host adapter and all devices on the SCSI bus
have unique SCSI IDs? (See Step 4 on page 3, and
Step 10 on page 5.)
Are all devices on the SCSI bus terminated properly?
(See Step 4 on page 3, and Step 10 on page 5.)
Does your system CMOS setup require you to enable
PCI bus parameters? If so, see your computer's docu-
mentation. Check that IRQ channel assignment,
board, and BIOS settings have been made.
If you still have problems after checking the above items,
continue with the following section.
Common Problems and Solutions
I installed the host adapter and my SCSI disk drive, but my computer
will not boot from the SCSI disk drive.
If both SCSI and non-SCSI (e.g., IDE) disk drives are
installed, then the non-SCSI disk drive is always the boot
device. If your system has only SCSI disk drives:
Make sure the Hard Disk (or Drives) setting in your
computer's setup program is set to None or No
Drives Installed, as is required for SCSI hard disk
drives.
Make sure the SCSI boot drive is set to SCSI ID 6.
8
If you have an ISA-based SCSI host adapter installed
with a connected SCSI hard drive, this SCSI hard
drive will be your boot device, since ISA host adapt-
ers have higher priority in the system than PCI host
adapters.
I receive the No SCSI devices found. Check cables and power error
message.
An unexpected time-out occurred.
Check that the terminator is securely attached to the
SCSI connector on the hard drive. Check that the SCSI
cable is securely connected to the SCSI connectors on
both host adapter and the SCSI device. Then reboot
the computer.
If the above step does not work, turn OFF the com-
puter, disconnect the SCSI cable from the host
adapter and then restart the computer. If the com-
puter successfully restarts, the SCSI cable, terminator,
or hard drive may be defective.
When the Adaptec BIOS header message appears, it hangs my system.
Make sure the SCSI hard drives are properly terminated.
One of the SCSI devices on my computer does not allow me to
disable termination. How can I install it on the SCSI bus?
If it is an external SCSI device, install the device as the
last device of the external daisy chain. If it is an internal
SCSI device, install the device at the end of the internal
SCSI cable.
The system works erratically. It hangs or the host adapter sometimes
cannot find the drives.
Check cable length and integrity. If one or more Fast SCSI
devices are installed, the total length of all cables (inter-
nal and external) connected to the host adapter should
not exceed 3 meters (9.8 ft.). If no Fast SCSI devices are
connected, the total length of all cables should not exceed
6 meters (19.7 ft.).
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