Yes, what I'm actually looking for is the 2nd one. (that is, I don't care that the backup happens now or in 15 minutes, but I care that when the backup runs, th

Yes, what I'm actually looking for is the 2nd one. (that is, I don't care that the backup happens now or in 15 minutes, but I care that when the backup runs, the tool doesn't have to rescan the whole filesystem)