Comment # 30 on bug 920368 from Sebastian Parschauer

The problem was that obsolete data has been written back to disk by parted. I
think this is exactly what happened here as well.

Upstream commit:
> http://git.savannah.gnu.org/cgit/parted.git/commit/?id=fb99ba5ebd0dc34204fc9f1014131d5d494805bc