Comment # 36 on bug 1060551 from Martin Wilck

One more time, please be careful. I have a bad feeling about this. The fact
that it can be done doesn't mean that it should be done.

If you have a fake RAID1 with metadata at the end of the disk (e.g. DDF),  you
can pull a disk and put it into another bay. The other system will read it just
fine, even if it has no RAID controller. The presence of RAID meta data alone
does not imply that the disk shouldn't be used. It's just a matter of
*priority*: If a RAID device with the given WWID/LABEL/UUID exists, it's
preferred over the individual members.

I keep repeating myself: This is a job for udev.