Grub not working under software RAID

[Stelios A.]

Hi all,

I performed an upgrade from Lenny to Squeeze and didn't manage to
install successfully the grub boot loader.
See below the errors.

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backup:/tmp# 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:/tmp# /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 net.
/usr/sbin/grub-probe: info: changing current directory to shm.
/usr/sbin/grub-probe: info: changing current directory to pts.
/usr/sbin/grub-probe: info: opening md0.
/usr/sbin/grub-probe: error: no such disk.