Recover grub with /boot on a separate partition.
Hi.
Somehow I broke my boot. Probably after playing with PClinuxOS install which has legacy grub version. I need help with recovering grub with /boot on a separate partition. Most tutorials suggest that boot directory is on the same partition with system. But I have boot on the /dev/sda1 and Kubuntu on the /dev/sda5. I tried to boot from Ubuntu livecd and execute sudo grub-install --root-directory=/mnt/sda1 /dev/sda or sudo grub-install --root-directory=/mnt/sda5 /dev/sda But with no result. I always boot in the empty grub console. Fortunately I have all my boot drive in tar.bz2, so I can experiment. What should I do to recover my boot? |
1. Boot into the live CD
2. from console ~$ sudo apt-get update 3. Now mount the exiting Linux install: ~$ sudo mount /dev/sda5 /mnt/ ~$ sudo mount /dev/sda2 /mnt/boot 4. Bind your /dev, /proc and /sysfs and copy over the resolv.conf then chroot into it: ~$ sudo mount –bind /dev /mnt/dev/ ~$ sudo mount -t proc proc /mnt/proc/ ~$ sudo mount -t sysfs sys /mnt/sys/ ~$ sudo cp /etc/resolv.conf /mnt/etc/resolv.conf ~$ sudo chroot /mnt 5. Now install and grub: ~$ apt-get update ~$ apt-get install grub 6. Create the GRUB directory: ~$ mkdir /boot/grub/ 7. Copy over the GRUB files to the new grub folder: ~$ cp /usr/lib/grub/x86_64-pc/* /boot/grub/ (Replace x86_64-pc with your architecture if you are using something other than AMD64) 8. Now run grub: ~$ grub grub> device (hd0) /dev/sda grub> find /boot/grub/stage1 grub> root (hd0,X) grub> setup (hd0) If ‘fine /boot/grub/stage1′ shows something else than 0,0, for example 1,0, then do ‘root (hd1,X) X is the partition number where / is. 9. Now you can create a menu.lst by running: ~$ update-grub |
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