Comment 8 for bug 442735

The problem here is that dmraid finds valid fakeraid signatures on your disks, which is the only way for it to know if you have a fakeraid or not. It would not happen if you removed the fakeraid in your BIOS setup.

A workaround is to boot with the "nodmraid" boot option. This, and the fact that dmraid is included on the Desktop CD should appear in the Release Notes, but for some reason it is not on the web site yet.