The RAID flash images and RAID hd images are compressed in pairs for /dev/hda
and /dev/hdc which make up a mirrored raid assemby containing /dev/md0 and
/dev/md1. Both the boot device and root device have to be set to md0 in the
cobalt rom. The rom finds the raid devices on it's own thus being able to boot
to the kernel in /dev/md0. In the event that one disk has failed, it will still
be able to boot via md0 with only one of the two mirrored disks operational.

Dave Studeman