HP PCIe U320 SCSI Host Bus Adapter - Manual (Page 31)

5 Troubleshooting
This chapter describes troubleshooting techniques that can be used to identify and resolve issues
associated with the HP StorageWorks U320e SCSI Host Bus Adapter. Some of these techniques may
seem simplistic or overly obvious, but these are the ones that are commonly overlooked and can take
several hours of frustration to find. It is important to only try one technique at a time. While changing
multiple variables may seem to be a time saver, it usually complicates the troubleshooting process.
Investigating the adapter installation
To investigate problems that could be caused by the installation of the adapter:
1. The host adapter may be improperly seated. Power down the computer and reseat the host adapter.
2. Try putting the host adapter in a different PCI slot.
Investigating the SCSI cables and devices
To investigate problems that could be caused by the SCSI cables or devices:
1. Verify that all of the SCSI devices in the bus are powered on.
2. On Windows, run the SCSI Domain Validation utility. See " SCSI Domain Validation utility (Windows
only) " on page 21.
3. Check the SCSI devices to make sure that they are all set to different SCSI IDs. Each device on a
SCSI bus must use a unique ID, including the host adapter. Devices on bus 1 can have the same
IDs as those on bus 2. By default, the host adapter uses SCSI ID 7, so devices should use IDs 0
through 6 or 8 through 15.
4. Check cable integrity. Check the cables for solid connections. Make sure they are screwed down.
Inspect cable ends for bent pins. Ultra320 SCSI requires high quality cables that are specifically
rated for the Ultra320 transmission speeds.
5. Boot into Windows and use the ATTO Configuration Tool to verify that the host adapter has its
termination set properly. Instructions to do this can be found in the ATTO Configuration Tool help files.
6. Verify that the external terminator is the same SCSI type as the devices (certified for Ultra320 SCSI
or lower) and does not have damaged pins.
7. Try attaching the SCSI devices one at a time with different cables, adding drives and cables until the
problem occurs. This will help pinpoint the device or cable causing the problem.
8. Watch the LED indicators on the SCSI devices before, during, and after startup. Drive lights should
also flash at startup as the SCSI bus is scanned. This may give a clue as to the root cause of the issue.
User guide 31