Booting to SATA, where Lilo goes and GRUB does not

[Marc Singer]

On the MSI K8TNEO motherboard, there are two SATA controllers and a
two channel EIDE controller.  The linux-2.6.6-rc? SATA drivers present
the SATA devices as being scsi attached.  Using LILO, it is
straightforward to get the machine to boot Linux on the first SATA
drive.  On GRUB, it is less clear.

There are two SATA drives are each partitioned into a 20M and 100G
partition.  The first is combined on both drives to form a RAID1
partition for /boot.  The second is combined on both drives to form a
RAID1 partition for /.  In /boot/grub/devices.map we see

  (hd0) /dev/md0

but this isn't really correct since I need grub to recognize the MBR
region of /dev/sda.  Setting the device map to 

  (hd0) /dev/sda

doesn't work because grub-install keeps looking for /dev/md0.

So, is there something I'm missing?  Is there a way to install GRUB so
that if one drives fail that the system can still boot?