by Rosario Carcò.
And that's also the reason why DOING Backups is only one side of the medal/coin. The most important part is RESTORING backups from tape to check whether you really get what you expect to be on your tapes.
In my Moodle 1.9 years I restored at least twice per year to check the backups and every time a teacher lost or messed up his course. Only after restoring, you are sure you get what you expect.