Re: Not a problem
"do you really have a backup?"
It depends on the requirements. If it's for a legal requirement with very infrequent and non urgent access then yes. There are specialist data recovery firms that maintain infrastructure to support just this type of access.
There is a world of difference having to retrieve something specific from a particular time, to having to restore data from all of the backup tapes over a period of time. I've know multiple tape drives being worn out during massive data disclosure exercises. Incidentally if the tape movement logs show a bunch of your old tapes have been retrieved and updated, data disclosure becomes even more of a world of pain.