Re-installing grub on a software RAID 1 partition

grub got screwed up on a system where every device is RAID 1, including the boot partition. I needed to reinstall it. So we try grub-install /dev/hda, right? Nope, grub says there’s “no corresponding BIOS drive for /dev/md0″ or some such. grub-install /dev/md0? Keep dreaming.

This is the solution for reinstalling grub on a software RAID 1 boot drive that I found, and tried. (Well, really Doofus tried.) It worked apparently. Amazing.

More amazing is that the Red Hat installer gets grub onto RAID 1 devices just fine. Port that into grub-install, bitches! Thank you.