Back up tapes - how far back?
Morning my lovelies.
One of my techies found an old email that had been printed out from last May - before I started, when the previous NM was migrating from CC3 to a vanilla 2k3 setup - where a parent has (justifiably) complained about his daughters coursework being lost. Now this was an unusual occurence because of the migration, and won't happen again, and I do sympathise with him. In said e-mail, though, he posited the idea of keeping weekly backups for 2 years in order to cover any eventuality where coursework might be lost.
Seems to me that that is a little bit of overkill. We currently have 4 weeks of backup - Monday to Thursday are overwritten weekly and Friday has a rotation of 4 sets of tapes, hence 4 weeks - and this to me seems entirely adequate and reasonable. Having 104 weeks x 6 servers = 624 tapes, and the room to store them safely (i.e. fireproof), seems entirely unreasonable.
Which got me wondering - how long do you keep your backups stored for? Am I asking for trouble with only 4 weeks? Just how far does our responsibility to mollycoddle the kids extend, and at what point do they have to take responsibility for checking and reporting losses to us within a reasonable timeframe?
And if any of you say you do 2 years to make me look bad I may well go and sulk. So there.