Data Cassettes - HP Visualize J5000 Owner's Manual

Using Your Digital Data Storage (DDS) Tape Drive
DDS Tape Drive and Cassette Descriptions
If the LED indicators on your DDS-format drive display the Caution
condition, follow this procedure:
• Check the system console for any tape-error messages. A hard error
during a read or write operation may have occurred.
• Clean the heads with a cleaning cassette (HP92283K) as described in
the next section, "Cleaning the Tape Heads".
• Repeat the operation you performed when a Caution signal displayed.
If a Caution signal still displays, the data cassette should be replaced.
• If you are performing a backup from disk to tape, discard the data
cassette and back up your files using a new data cassette.
• If you are performing a restore from tape to disk, complete the
restore, back up the files to a new data cassette, then discard the old
data cassette.

Data Cassettes

Media Life
HP DDS data cassettes are currently specified to 2000 passes over any
part of the tape under optimal environmental conditions (50% relative
humidity, 22 degrees C). During a tape operation, any one area of the
tape may have multiple passes over the heads. This translates into
approximately 200 to 300 backups or restores.
Under certain conditions, the life of your data cassette is less. Replace
your data cassettes after 100 backups or restores if your operating
conditions meet any of the following criteria:
• The relative humidity in your operating environment is consistently
less than 50%.
• You know that the backup software you are using makes multiple
passes over sections of the tape during backups or restores.
• You notice that when you do backups and restores the tape stops and
starts frequently.
106 Chapter 5