QA output created by 315
Format filesystem
Create files
Check files
cf41e243bf211225660f3fabe6db9eb6  SCRATCH_MNT/file1
cf41e243bf211225660f3fabe6db9eb6  SCRATCH_MNT/file2
Inject error
CoW a few blocks
FS should be shut down, touch will fail
touch: cannot touch 'SCRATCH_MNT/badfs': Input/output error
Remount to replay log
FS should be online, touch should succeed
Check files again
fe9070b9c9deb97ed53811efda5c4ad5  SCRATCH_MNT/file1
cf41e243bf211225660f3fabe6db9eb6  SCRATCH_MNT/file2
Done
