If UPPER is the same as LOWER, then the subhost root filesystem is not
setup as an overla. Rather it is set up as a bind mount, if UPPER is
different from LIVE, or just as a pre-mounted LIVE filesystem.
If UPPER is the same as LOWER, then the subhost root filesystem is not
setup as an overla. Rather it is set up as a bind mount, if UPPER is
different from LIVE, or just as a pre-mounted LIVE filesystem.