always fails

Fails with errors:
    ERROR: sha1sum of /dev/md/vol0 has changed
    ERROR: /dev/md/vol0 has unexpected state on /dev/loop10
    ERROR: unexpected number of online disks on /dev/loop10
    ERROR: /dev/md/vol0 has unexpected state on /dev/loop8
    ERROR: unexpected number of online disks on /dev/loop8
    ERROR: sha1sum of /dev/md/vol0 has changed