Comment 2 for bug 22535

Good catch, fsck_hfs from my osx machine followed by a clean unmount resolved
the problem.

I'm pretty sloppy about properly unmounting hotplugged devices (on both linux
and osx), so it's entirely possible that a dirty unmount caused the problem.

The question is what the right solution is, since I'm pretty sure I'm not the
only one to ignore "don't unplug me yet" messages ;)