Grub not working under software RAID

[Sean Porth]

I have the same exact issue.  Upgrading to Debian squeeze.  I even upgraded the 
grub2 package to the Debian unstable version (1.99~rc1-2) and same error.

backup:/etc# grub-install /dev/md0
/usr/sbin/grub-probe: error: no such disk.
Auto-detection of a filesystem of /dev/md0 failed.
Please report this together with the output of "/usr/sbin/grub-probe 
--device-map="/boot/grub/device.map" --target=fs -v /boot/grub" to 
<address@hidden>

backup:/etc# /usr/sbin/grub-probe --device-map="/boot/grub/device.map" 
--target=fs -v /boot/grub
/usr/sbin/grub-probe: info: changing current directory to /dev.
/usr/sbin/grub-probe: info: changing current directory to disk.
/usr/sbin/grub-probe: info: changing current directory to by-uuid.
/usr/sbin/grub-probe: info: changing current directory to by-id.
/usr/sbin/grub-probe: info: changing current directory to block.
/usr/sbin/grub-probe: info: opening md0.
/usr/sbin/grub-probe: error: no such disk.