Tape Needs

With this schedule, you will need six tapes (if you want to reuse daily tapes), or nine tapes (if you want to use four different daily tapes): one for the level 0, four for the Fridays, and one or four daily tapes.

If you need to restore a complete file system, you will need five tapes: the level 0, all preceding Friday tapes (three), and the most recent daily tape.