On Sun, Mar 29, 2015 at 3:43 AM, Niki Kovacs <info at microlinux.fr> wrote: > Now how would that work with the new GRUB2 under CentOS 7? Or maybe it's > already installed on both disks, but how would I know that? grep grub2-install /path/to/anaconda/logs/program.log I forget if it accepts two devices on a line, or if it takes separate commands. But grub2-install /dev/sdX grub2-install /dev/sdY That will work on BIOS. On UEFI this is totally fakaked right now as neither GRUB upstream nor distros have a proper user friendly solution for this at all. CentOS 7's installer offers an improper user friendly solution which allows you to RAID 1 the EFI System partitions with md raid. On UEFI, I do a post-install alteration to make it something more standard with the way upstream ought to be doing it. That means two grub.cfg's: a generic one on the ESPs that merely forwards to /boot/grub2/grub.cfg. That makes the ESP contents generic and never modified again. And then the real grub.cfg is /boot/grub2/grub.cfg which can of course then be on raid1 or raid 5 or whatever, and this is the file that gets updated when there are kernel updates. -- Chris Murphy