HP Visualize J5000 hp Visualize J5000, J7000 workstations owner's guide (a4978 - Page 108

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. 108 Chapter 5