ok, i tried it out:
Code
root@HomeServer:~# mdadm --stop /dev/md127
mdadm: Cannot get exclusive access to /dev/md127:Perhaps a running process, mounted filesystem or active volume group?
root@HomeServer:~# mdadm --assemble --force --verbose /dev/md127 /dev/sd[ab]
mdadm: looking for devices for /dev/md127
mdadm: Cannot assemble mbr metadata on /dev/sda
mdadm: /dev/sda has no superblock - assembly aborted