When journal disk is faulty and we are reassemabling the raid array, the
journal disk is old. We don't allow the journal disk added to the raid
array. Since journal disk is missing in the array, the raid5 will mark
the array readonly.
Signed-off-by: NSong Liu <songliubraving@fb.com>
Signed-off-by: NShaohua Li <shli@fb.com>
Signed-off-by: NNeilBrown <neilb@suse.com>