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Re: GRUB booting from RAID1 is broken after Ubuntu update: how to recove
Re: GRUB booting from RAID1 is broken after Ubuntu update: how to recover?
Mon, 02 Aug 2010 23:43:50 +0200
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I fixed the boot issue by reinstalling grub using the instructions on
Because this page is German, I will describe in English what I did:
Basically I booted from "Ubuntu Rescue Remix 10.04" (from USB stick) into a
command prompt and then:
sudo mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1
sudo mkdir /mnt
sudo mount /dev/md0 /mnt
Now I could access my system partition (which was mounted on /).
Install package containing the command grub-install and reinstall GRUB by
writing it to the MBRs of the RAID1 members:
sudo apt-get install grub-pc
sudo grub-install --root-directory=/mnt /dev/sda
sudo grub-install --root-directory=/mnt /dev/sdb
After rebooting (works now!):
The system seems to work right now, but I receive an error message while
udevd-work: inotify_add_watch(6, /dev/sdb5, 10) failed: No such file or
nForce2_smbus 0000:00:03.2: Error probing SMB1.
What does that mean? If I can fix this, then I consider my system being
completely up and running again.