Am Freitag, den 02.07.2010, 13:38 +0200 schrieb splotz90: > Am 01.07.2010 22:29, schrieb Andrew Benton: > > Which partition will grub choose? > I have found some additional information about that: > > http://www.linuxquestions.org/questions/linux-software-2/how-does-grub2-find-the-grub-cfg-file-794560/ > > The "grub-setup" command seems to add an information where to find the > grub.cfg right after the MBR. > > > Sebastian
I did some testing in a virtual machine (if someone is interested in it): Here are my partitions: /dev/sda1 --> Ubuntu 10.04 (with /boot on it) /dev/sda2 --> swap /dev/sda3 --> empty ext4 partition First I've mounted /dev/sda3 over /boot and installed the GRUB files on it: mount /dev/sda3 /boot grub-install --grub-setup=/bin/true /dev/sda After that I've mounted /dev/sda3 under /media and copied the existing grub.cfg: umount /dev/sda3 mount /dev/sda3 /media/sda3 cp /boot/grub/grub.cfg /media/sda3/grub I removed the Memtest menu entry's from the grub.cfg on /dev/sda3 (now, there is a difference between both files). Finally: grub-setup -r \(hd0,3\) /dev/sda But after a reboot: error: file not found grub rescue > So I reinstalled GRUB with help of the Ubuntu CD. After rebooting my system I tried this: mount /dev/sda3 /boot grub-setup -r \(hd0,3\) /dev/sda And I got grub.cfg from /dev/sda3! :-) So I think that grub-setup writes the following information to a place right after the MBR: - on which partition grub.cfg can be found - in which folder grub.cfg can be found (/grub or /boot/grub) If I want my old grub.cfg from /dev/sda1, I just need to reinstall GRUB with: grub-setup -r \(hd0,1\) /dev/sda -- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
