From: Jonathan Vomacka <juvix88 at gmail.com> > Essentially I guess the short question is, How do I make a non bootable > drive bootable if the original MBR is no longer available? First, ask the guys at your datacenter what's the benefit of RAID if you have to reinstall from scratch after a drive failure... Second, that's really bad luck that the one drive that failed out of the four was the one booting... Now, I never had to do any recovery yet but, while you are waiting for some experts answers, I think it would look something like: Boot in rescue mode. Make a backup if you do not have one already. chroot /mnt/sysimage/ # grub grub> root (hd0,0) grub> setup (hd0) grub> quit reboot Good luck! It is friday! JD