HP StorageWorks vs80 User Manual page 58

Table 4
Troubleshooting Table
Problem
SCSI ID
Changed drive SCSI ID, but
the host server does not
recognize the new ID.
Autoloader performance
The autoloader is not efficiently
backing up data.
58 Diagnostics and Troubleshooting
Make sure that all SCSI devices on the same bus have unique ID
numbers.
If the SCSI bus is narrow (50-pin) only SCSI IDs 0 through 7 are
available.
Make sure that you cycle power on the autoloader after
changing the SCSI ID.
Reboot the host server.
Check the network bandwidth from the host computer if you are
backing up data over a network. Consider comparing to a local-
only backup.
Make sure that the autoloader is on its own SCSI bus and not
daisy-chained to another tape drive or to the hard drive being
backed up.
Clean the tape drive. See
for instructions.
Try a new cartridge. A marginal cartridge can cause
performance problems due to bad spots on the tape requiring
retries.
Make sure that the data is being compressed.
Check the size of the files. Small file size can impact
performance.
Confirm that the backup application is utilizing block sizes of at
least 32KB, preferably 64KB. Refer to the backup application
documentation for details.
Solution
Cleaning the Tape Drive on page 36
Chapter 4