On Fri, May 23, 2014 at 1:15 AM, Ariszló <[email protected]> wrote: > What does GRUB overwrite on a GPT disk? > > On MBR disks, backing up the first 440 bytes would allow to later restore > the original MBR: > > sudo dd if=/dev/sda of=mbr bs=440 count=1 #backup > sudo dd if=mbr of=/dev/sda #restore > > What should one backup on a GPT disk before installing GRUB?
Generally nothing. grub-install won't touch the partition table, and there has never been a guarantee (even with an msdos label) that restoring the first 440 bytes to the MBR would actually result in your old bootloader working again. What is your end goal? -- Jordan Uggla (Jordan_U on irc.freenode.net) _______________________________________________ Help-grub mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-grub
