Resolving Operating Problems; Correcting Intermittent Failures - Compaq DDS-2 4/16-GB Reference Manual

5-8 Compaq DAT Drive Reference Guide

Resolving Operating Problems

Correcting Intermittent Failures

Writer: Debbie McRill Project: Compaq DAT Drive Reference Guide Comments:
Part Number: 155452-002 File Name: Chapter 5 Troubleshooting.doc Last Saved On: 2/10/00 10:11 PM
If the DAT tape drive worked previously but now does not, try the following:
1. Clean the tape drive.
2. Run the tape drive option of the Compaq Diagnostics Utility (Compaq
Intel-based computers only).
3. Determine what has changed in the system since the last tape backup.
a. If the system configuration has been changed, try removing the
change to see if it affects the tape backup system.
b. If a board or option has been added, check its DMA, IRQ, and port
address settings for conflicts. Try removing the board or option.
c. If a SCSI device has been added, check for SCSI ID conflicts and
proper termination.
4. Check the DAT tape drive connections. Reseat the controller, SCSI
signal cable, and power cable.
If the DAT tape drive works only intermittently:
1. Clean the tape drive.
2. Run the tape drive option of Compaq Diagnostics Utility (Intel-based
computers only) or show config
only).
a. Record the firmware revision level.
3. If the tape backup procedure starts correctly but then stops with an error:
a. If the error occurs on the same file or directory each time, remove
that file or directory from the backup list because it may be
corrupted. Correct any errors that you find with the file system.
4. If the tape backup procedure starts correctly but stops intermittently:
a. Check the DMA, IRQ, and port address settings for conflicts. If there
is a conflict, change the setting or remove the conflicting board.
b. Try using a new cassette.
Compaq Confidential – Need to Know Required
at the SRM console (AlphaServers