>>>Grub doesn't actually boot from a RAID - it just happens to work >>>because RAID1 looks the same on the underlying single partitions. >>>Boot with the CD and point the grub config to one or the other >>>of the hd partitions holding /boot. If you get an error, that >>>one might be corrupt and you can try the other. If you get >>>to the point where the kernel is loaded and you can't mount >>>root, then the problem could be with RAID, but that part will >>>probably work. > > >>I always use lilo for mirrored servers. It will boot from either drive when >>one fails. > > > Grub will do that too if you manually install it on the other > drive. The details of how you do that will vary depending on > how your bios sees the other drive if the primary one fails. > Grub doesn't have to be re-installed at every config file > update though, so it isn't that bad to do it once. > Here's a good paper on this....... "Configuring and Managing Software RAID with Red Hat Enterprise Linux 3" http://www.dell.com/downloads/global/power/1q04-hul.pdf