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Re: [SLUG] Backup rotation schemes


Jon Biddell wrote:

> Monthly backups are archived permenantly, weekly tapes re-cycle every 4 weeks.
>
> The advantage doing a differential, rather than incremental, is that a file
> modified on Monday is also backed up on Tuesday, Wednesday and Thursday.
> With an INCREMENTAL, the Monday file will only be on the Monday tape, as
> the archive bit is reset after backup.

Thus requiring only 2 tapes for a full restore at any time.

All this requires the backup program to change and track the file attributes
right ? which tar & dump don't do.