Comment 46 for bug 290885

I'm working through verification of this fix, and one thing that I've come across is that if the raid was setup using the older version of grub/grub-installer (e.g. off of 8.04.1 media), grub-install is not re-invoked and so the second disk still does not have a grub stage 1 in its MBR. Thus, if the first disk of a raid1 set fails, the system will still not boot at all.

In talking with Dustin about this on IRC, he suggested that it's probably best handled as a documentation issue. I think it would be useful to to at least warn via debconf/update-notifier if /boot is on an md device and grub is being updated from a version that did not support "grub-install /dev/mdX" properly.

Also, for testing the update to grub-installer, it would be useful if we could do a one-off spin of the hardy images for testing in prep for 8.04.2.

(That's the only issue I've come across so far; now that I've manually run 'grub-install /dev/md0', I'm able to boot in degraded mode off of either disk).