I have inherited a tape backup scheme that currently doesn't wash any tapes. Expensive, but fine. We currently run Fulls every quarter, which become our offsite. We then run incrementals in the interim. The fulls are permanently archived offsite.
I would like to switch to a more traditional scheme to save tapes.
However, I can't account for recovering data indefinitely that is deleted by a user (or becomes corrupt) between the full backups. e.g. I have a large ESRI data set of 400 files. A full backup is made on Jan 1. User processes the dataset for several weeks then at some point archives it to network storage. Unbeknownst to the user, one of the files in the dataset becomes corrupted, rendering the entire dataset unusable.
Is there any washable backup scheme that could recover from this type of lost file indefinitely, or is my issue that I need to define a time frame within which I can provide recovery?
Just curious if anyone else has dealt with or considered this scenario?