We currently have two tape drives that can store 10GB of data uncompressed - we have reached a point where we are over the 20GB marker. We use 3 sets of tapes - 1 tape for each workday. We are looking into upgrading the backup system by replacing the ones we have with one new bigger tapedrive. We are looking into getting a Sony AIT3 backup drive that stores 100GB uncompressed (260 compressed) of data. The reason we're going this big is because we anticipate growth that would require this kind of storage.
In the meanwhile is it possible or recommended that we get 3 of these backup tapes (one for each week) and store different backups on each tape. To be more specific, I would place one tape in the drive on monday, have the backups stored on that tape (incremental) for the entire week. In other words, append the data on the tape with the most recent information - I know this is possible - but is there any solution that will allow you to restore data from a specific date from the one tape. Also, is this type of backup recommended?
Even more interesting, is it at all possible to create seperate backups on the tape drive - so they look and act like seperate tapes. This way I could essentialy select a date to restore from and instead of it pointing to the Wednesday tape I could just restore it from the Wednesday portion on the one tape.