So from what I have read I would run grub-install /dev/sda ? I have setup the raid with /boot (100Meg) /swap (2gig) / (the rest) All 3 are mirrored. I don't want to mess this up sorry I am new to this. Mace Scott Silva wrote: > Mace Eliason spake the following on 5/1/2006 10:58 AM: > >> Hi, >> >> I have a setup with raid 1 and one drive has failed, and the other drive >> won't boot says missing os. >> >> I thought I had it setup and tested but it would appear that it wasn't >> setup to boot form either drive. >> >> How can I boot from the good drive that is missing the grub. >> >> I am thinking of using linux rescue when booting from the centos 4.2 disc >> >> This is a production machine and I don't want to mess it up. >> >> Please help >> > Use linux rescue and you can fix grub. > http://www.gnu.org/software/grub/manual/html_node/Invoking-grub-install.html > > >