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Need Assistance?
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 an
expansion slot?
■
Is pin-1 orientation maintained throughout the SCSI
bus? (See Step 6 on page 3.)
■
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 4.)
■
Are all devices on the SCSI bus terminated properly?
(See Step 4 on page 3, and Step 10 on page 4.)
■
Is parity checking consistently enabled or disabled on
all devices (including the host adapter) on the SCSI
bus? (See Basic Host Adapter Settings on page 9.)
If you still have problems after checking the above items,
continue with the following sections.
Common Problems and Solutions
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 feet). If no Fast SCSI devices are
connected, the total length of all cables should not exceed
6 meters (19.7 feet).
I have both a Soundblaster card with a SCSI controller embedded on
it, and an AHA-1510B installed in the same computer. Am I going to
experience any resource conflicts?
The AHA-1510B and the SCSI controller on the Sound-
blaster card are typically both set, by default, to use I/O
port address 340 and IRQ 11. In addition, the Sound-
blaster card may also use DMA channel 5 and I/O port
address 330 for its Midi port. To avoid resource conflicts,
make sure to change the settings on one of the cards.
When trying to run the Format/Verify SCSI disk utility in SCSISelect, I
get an Unexpected SCSI Command Failure pop-up box with error
information.
The utility probably encountered a problem with the disk
device or the media and therefore cannot run. You can
determine from the Sense Key information (e.g., 06h -
Unit Attention) both the cause of the problem and its
solution. Here are some of the more common Sense Key
values and their meanings:
■
02h - Not ready
—The media is not ready to format.
Be sure that media is inserted in the drive and that
the media is spun up.
■
03h - Medium error
—The disk media may be defec-
tive. If it is a removable-media drive, try using a dif-
ferent disk media. If it is a fixed disk drive, the disk
may be physically damaged. Verify and format the
media with SCSISelect.
■
04h - Hardware error
—The disk drive may be defec-
tive. Consult the hardware documentation and con-
tact the manufacturer.
■
05h - Illegal request
—The Adaptec formatting utility
does not support a low-level format of this device;
however, the device may already be low-level format-
ted by the manufacturer. (This error rarely occurs.)
■
06h - Unit attention
—The removable media may be
write-protected. Disable write protection and run the
utility again.