Dust and lint can produce errors on tape backups. These can be limited to specific files or corrupt entire backup sets. Clean the tape backup hardware every two weeks to help ensure data is properly safeguarded. CSI recommends weekly cleaning if the system sets on the floor. Develop a tape rotation and replacement schedule.
Backup tapes are very similar to the tape used in audio cassette decks.
After a period of time, the tapes begin to degrade and will eventually become unusable. Consider having two or more Thursday backup tapes that are taken off-site on a rotating basis every Friday. This is an added safety precaution in case there is damage to the tapes due to fire, flood or vandalism. Retire tapes after six months of continual use. The retired tapes can be used for monthly archives or emergency spares.