My goal is to have short term tape backups, full on Friday, incremental's there after.
My issue is that I've a large amount of data, over 6 TB - and backing up that live to tape in a full backup takes 80 hours or more. Making a weekly incremental backup unfeasible.
I've successfully got the tape backup taking only 20 hours for full backup when configured with the short-term to disk and the long-term to tape.
My question is; if I make two short-term jobs, one short-term to disk and the other short-term to tape; is DPM aware enough that it will do the second short-term to tape from the existing short-term disk backup, or will it grab it from the live system?
Alternatively; do the experts at large have a creative suggestion on how I can get DPM to accomplish my goal?