Comment 14 for bug 442735

I'm going to have to say that this is not a bug, but rather an invalid hardware configuration. A disk can not be part of a fake raid and an mdraid at the same time. Simply disabling the raid support in the bios has no effect on Linux as it has no way of telling whether or not the bios raid support is enabled or not. If you aren't using the disk as part of a fakeraid set, then you should scrub the raid metadata from the disks with dmraid -E, or the bios utility.