Our media arts department has a 4TB drive they store their images and videos on which is not currently being backup up due to the data volume. We currently use a 400/800GB tape drive for our standard daily (full) backup of everything else, but that obviously doesn't lend itself to backing up a 4TB drive. Only a small portion of the 4TB changes daily, but we still need the ability to recover deleted or corrupted files, so we need more than one revision backed up.
I don't believe a differential would work for us with a small tape drive because the weekly full backuos would require 10 tapes and too many hours to complete, even if the dialy change were handled.
Can anyone suggets what backup scheme and perhaps media we should consider? We are looking for an affordable solution - many of the high capacity solutions are simply not in our financial reach. I'm assuming an incremental backup and maybe a non-tape based solution since I don't see affordable tape solutions.