QA output created by 335
Filesystem content before power failure:
SCRATCH_MNT/a:
b
bar

SCRATCH_MNT/a/b:

SCRATCH_MNT/c:
foo
Filesystem content after power failure:
SCRATCH_MNT/a:
b
bar

SCRATCH_MNT/a/b:

SCRATCH_MNT/c:
foo