HP StorageWorks U320e SCSI Host Bus Adapter user guide (AH627-96001, March 2007)

5 Trou bleshootin g

This chapter describes troubleshooting techniques that can be used to identify and resolve issues

associated with the HP StorageWorks U320e S C SI Host Bus Adapter. Some of these techniques may

seem simplistic or overly obvious, but these are the ones that are com m only 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.

Investigati

ng the a dapter installation

To investiga

te 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 Ultra3 20 transmission speeds.

5. Boot into Windows and use the AT TO Conﬁguration Tool to verify that the host adapter has its

termination set properly. Instructions to do this can be found in the ATTO Conﬁgu ration 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, a dding drives and cab les until the

problem occurs. This will help pinpoint the device or cable causing the problem.

8. Wa tch 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.

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