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Chapter 6: Troubleshooting
Device Driver Installation
Many backup applications use their own drivers for the library and tape drive. Before
installing a driver, make sure it will not be in conflict with the soft
ware.
Make sure that the proper device driver, if applicable, is installed for the library. Contact your
support representative for more information.
Troubleshooting Checks
Performance
ISSUE SOLUTION
Poor Throughput
Pe
rformance
Try a new tape. A marginal tape can cause performance
problems due to bad spots on the tape requiring retries.
Backing up data that compresses poorly or is
already
compressed will lower performance.
Check the size of the files. Small file size can impact
perf
ormance.
Confirm that the backup application is utilizing block siz
es of
at least 32KB, preferably 64KB. Refer to the backup application
documentation for details.
Check the network bandwidth from the host computer. If you
are back
ing up data over a network, consider comparing to a
local-only backup.
Make sure the backup server has enough memory to handle
the ba
ndwidth of the backup or restore.
Clean the tape drive using:
• OCP, see "Service Menu" on page 42
•RMU, see "Cleaning Tape Drive(s)" on page 65
Cleaning Cartridge
ISSUE SOLUTION
Cannot load the cleaning
car
tridge
Make sure you are using an Ultrium universal cleaning
cartridge.
Contact your service representative.
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