GRUB and RAIDframe
This is based on http://mail-index.netbsd.org/port-xen/2005/11/02/0006.html.
Legacy-MBR partitioning is required for GRUB to grok disklabels.
NetBSD MBR partitions must contain an on-disk disklabel.
set up shadow disklabel partitions for / and swap on both components
in the grub shell (grub --no-floppy)
root (hdN,0,x)
setup (hd0)
Oh, and GRUB sucks.