Tape Requirements for Daily Incremental, Weekly Cumulative Schedule

With this schedule, you need at least 9 tapes if you want to reuse daily tapes, which is not recommended. Preferably, you need 21 tapes if you save weekly tapes for a month: one tape for the level 0, four tapes for the Fridays, and four or 16 daily tapes.

• 1 tape for the level 0 backup.

• 4 tapes for all the Friday backups.

• 4 or 16 daily tapes.

If you need to restore the complete file system, you need the following tapes:

• The level 0 tape.

• The most recent Friday tape.

• All the daily tapes since the last Friday tape, if any.