Boot the Rescue from the DVD
This should be the same Arch as the installation: ie; 32 bit or 64 bit..
Once the DVD rescue gets to 'login', type: root
from there I run fdisk -l to confirm my HD partitition order.
We need to mount root (for me that's sda3)
Now mount / (sda3) with:
Code:
mount /dev/sda3 /mnt
To mount the other devices Next do:
mount --bind /dev /mnt/dev
Then chroot:
chroot /mnt
mount /proc mount /sys
Your prompt changes to: Rescue:/> Here type:
grub2-mkconfig -o /boot/grub2/grub.cfg grub2-install /dev/sda
Update the /etc/fstab with the new name of /boot partition
exit # reboot
If you plan to move a / (root) partition, do as additionnal task a mkinitrd -v
If you use LVM please check this post: https://forums.opensuse.org/vbcms-comments/478290-article-re-install-grub2-dvd-rescue-3.html#post2519005
N.B: This method should also work from a live cd
This should be the same Arch as the installation: ie; 32 bit or 64 bit..USE LIVE CD TO RESCUE
If you plan to use LVM, to mount /, do :
pvscan vgscan lvscan vgdisplay (or vgs) vgchange -ay mount /dev/rootvg/slashlv /mnt
