Currently running 'btrfs device delete' can end up with losing data
raid profile (if any), this test is to reproduce the problem.
The fix is
"Btrfs: avoid losing data raid profile when deleting a device"
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>