using rsync:
why not btrfs send | btrfs receive
? is there some advantage to rsync?
did you hotswap the drives after each btrfs replace
or shutdown and then swap?
what's your host OS and do the drives spin down if inactive?
thanks for the writeup!
how about adding the cutoff limit in the ui then? find myself shrinking and shrinking an image until it gets accepted and then promptly forgetting what the limit was.