taistor

To fix a non-bootable system and ensure GRUB is installed on both drives, manually install GRUB as follows:

• Reboot the server from the original Ubuntu Server CDROM
• From the Ubuntu boot menu, select “Rescue a broken system”
• Continue through the prompts until the screen “Device to use as a root file system” appears
• Press Alt-F2 to switch to a second console screen then press Enter to activate it.
• Mount the md0 RAID device and use chroot and grub to install the bootloader onto both sda and sdb using the following commands

mount /dev/md0 /mnt
chroot /mnt
grub
device (hd0) /dev/sda
root (hd0,0)
setup (hd0)
device (hd1) /dev/sdb
root (hd1,0)
setup (hd1)
quit

(many thanks to BigDiver for the above)

• Reboot the system with command “shutdown -r now”, remove the CDROM and allow the system to boot from the hard drive.

Filed under: linux