How to manually install GRUB after a failed installation or disk corruption of the MBR
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- BIOS error message about no bootable drive
- After first installation, server will not boot with BIOS error message
For this example, /dev/sda1 is the assumed /boot and /dev/sda2 is the assumed root partition.
LVM and EVMS users:
If you are using LVM, then the devices should be automatically seen. Type "lvscan" to make sure that your logical volumes have been detected.
For users using EVMS, the LVM volumes should be detected. You may use "lvscan" to find the volumes. Since the changes are being made to the /boot partition, LVM is not needed."
- Mount root to /mnt. If root is on an LVM or EVMS device, use the LVM or EVMS name for the devicemount /dev/sda2 /mnt
- Mount /boot to /mnt/boot. This device should be a traditional partition. mount /dev/sda1 /mnt/boot
- Mount system pseudo file systems under /mntmount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
- "change root" or chroot to /mntchroot /mnt
- Under /boot/grub, there is a file called "device.map." The file needs to be populated according to your disk layout. The first disk should be (hd0 ) . If the file looks fine, then continue to the next step. If it is missing or looks incorrect, populate it according to the following template. (hd0) /dev/sda
- Launch the grub interactive shellgrub
- In the interactive shell, you will see a "grub>" prompt. With grub the first partition on the first hard drive is hd0,0. The following example will install Grub on the first parition of the first drive.
grub> root (hd0,0)
Filesystem type is ext2fs, partition type 0x83
grub> setup (hd0)
Checking if "/boot/grub/stage1" exists... yes
Checking if "/boot/grub/stage2" exists... yes
Checking if "/boot/grub/e2fs_stage1_5" exists... yes
Running "embed /boot/grub/e2fs_stage1_5 (hd0)"... 15 sectors are embedded.succeeded
Running "install /boot/grub/stage1 (hd0) (hd0)1+15 p (hd0,0)/boot/grub/stage2/boot/grub/menu.lst"... succeeded
- Type quit
- Type exit
- Type reboot
The server should now reboot.
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- Document ID:7001376
- Creation Date: 17-Sep-2008
- Modified Date:03-Mar-2020
- SUSE Linux Enterprise Server
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