I'm being asked by a manager to supply a report that I don't think is possible to provide ... at least not in the way that person is hoping to see it. :-/
Let's say that in a 24-hour period I back up 50 TB of data. That (to me...) means that the sum total of the jobs that complete successfully (or, well, partially successfully) is 50 TB.
I'm being asked to show what that amount of data occupies *on tape*, without factoring in tape hardware compression. Stay with me here.
In my mind, to get at least a reasonably accurate idea of how much tape this 50 TB backup set is using, I'd just need to know what my average tape compression ratio is, for my LTO5 tapes, and divide the 50 TB number by whatever my average per-tape capacity is (using that compression ratio.) But again, that involves factoring in compression, and I'm being told not to do that for this report.
Aside from Accelerator or Dedupe backups, I cannot think of another way to do this.
Anyone else?