HP Surestore DLT Removable Tape Drive User's Guide

Troubleshooting

Other Problems

If your system does not recognize the drive, perform the following

checks:

The host computer system only identifies which IDs are present on SCSI

buses after power-on or a reset. If you powered up the drive or added the

drive to the tape array after the host system was turned on, the host will

not be aware that the drive is on the bus.

If you have hot-swapped a drive that was recognized by the host, the host

should recognize the new drive at the same SCSI ID as its predecessor.

To make the host look for devices on the bus, you need to reset the host. You

should be able to do this using the SCSI management software on your

computer. As a last resort, you could turn the host system off and on again.

Similarly, if you make any changes to SCSI IDs (on the back on the tape

array), you need to reset the bus for the host to recognize the changes.

If the drive still fails to recognize the drive, try the following

checks:

• Check that the drive is properly inserted into the tape array so that it

mates with the connectors at the rear of the enclosure. The extraction

lever should be pushed in, locking the drive in position.

Check the SCSI bus:

• Is the SCSI cable from the tape array firmly connected to the SCSI

connector on the computer?

• If there are other devices on the SCSI bus, are their IDs all different? If

necessary, change the ID of the drive or other devices. Use

HP TapeAssure on the HP SureStore Tape CD-ROM to find details of the

devices on the bus.

• If there is more than one SCSI bus attached to your system, check that

the system is looking for the drive on the correct SCSI bus.

• Is the bus terminated properly? Only the last device on the bus should

have a SCSI terminator fitted.

Check the system:

• Is the system configured to recognize the correct device at each SCSI ID?

• Is the correct driver for the tape drive installed?

• Look at the SCSI host adapter documentation and backup software

documentation for further advice.

dlt-m.book Page 3 Thursday, May 4, 2000 3:52 PM