https://github.com/kdave/btrfs-progs/issues/271 The summary is that 'btrfs inspect-internal min-dev-size' doesn't work. There are two values, one where it's obviously wrong: e.g. fs can be shrunk to 1MiB. And the more common case where it underestimates the amount of shrink - by a lot. So two extremes. Details in the bug. -- Chris Murphy
