Actidata actiLib Autoloader 2U, Руководство пользователя и обслуживания

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
Make sure the library and tape drive are on their own SCSI bus and
not daisy-chained to another tape drive or to the hard drive being
backed up.


Make sure the library is connected to a LVDS SCSI bus and there
are no SE devices on the same bus, because this will cause the
entire bus to negotiate down to SE speed.


Use an Ultra320 SCSI bus and high-quality cabling with the library.


Do not connect the library to a narrow SCSI bus.

Bad performance

Try a new cartridge. A marginal cartridge 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 performance.


Confirm that the backup application is utilizing block sizes 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
backing up data over a network, consider comparing to a local-only
backup.

Make sure the backup server has enough memory to handle the
bandwidth of the backup or restore.


Clean the tape drive. See ”
Cleaning the tape drive
” on page 57 for
instructions.

Media Attention LED Issues
Contamination by loose
debris.
Avoid contamination by ensuring that the library is installed in a clean,
contamination-free environment. Cartridges should be stored vertically in
their plastic cases. Continue cleaning the tape drive as needed.
Non-acclimated media A cartridge should be acclimated for at least 24 hours before being used,
particularly if it has been stored at a substantially different temperature
or level of humidity than the library.
Cartridge is incompatible Use only cartridges that are compatible with the drive type.

Make sure you are using an Ultrium universal cleaning cartridge.
(See ”
Cleaning the tape drive
” on page 57.)

Expired cleaning cartridge A cleaning cartridge is good for Ultrium universal librares: 50 cleans
Bad/defective/contaminated
media If the Media Attention LED is cleared and
–although the drive has been
cleaned - immediately re-displays each time a particular cartridge is
reloaded that cartridge should be suspected as being defective.,

Export the cartridge and load a known good cartridge. In some
cases, a cartridge can be worn out, have a defective Cartridge
Memory, or have been formatted as a Firmware Upgrade Cartridge.

Any cartridge that is suspected of being defective or contaminated
should NOT be reused in any drive.