> It sounds like btrfs specific behaviour. It would be interesting to know > what kernel version and btrfs version you were using, if only to confirm > my suspicion that even the versions in Debian are not suitable for use in > production. > > I'm going to guess that it was a series of 'btrfs balance' commands that > fixed things for you.
Correct you are! The various incantations used different filters and one of them worked. I have no idea what filters are and I would die a happy man without needing to know. I use Debian testing, so it's whatever kernel and btrfs packages that were in that as of yesterday. > Yes, this is right. The problem is not 'rm', the problem is that you use > sudo without understanding why it is set up like that: sudo logs the > command it executes to /var/log/auth.log Makes sense. So why did I get the exact same problem when I enabled the debug-shell? Unless it's also lying to me, doesn't it boot into a proper root shell?