8.04 -> 10.04 Grub Grub 2 and LVM

Jonathan Hudson jh+ubuntu at daria.co.uk
Thu Jul 1 15:17:33 UTC 2010

On Thu, 1 Jul 2010 03:15:55 -0400, Tom H wrote:

>On Wed, Jun 30, 2010 at 1:46 PM, Robert Steinmetz AIA
><rob at steinmetznet.com> wrote:
>>> Tom H wrote:
>>>> GRUB starts and begins to load. it them fails to find the root file system
>>>> and drops into a shell.
>Is udev creating the required /dev/md* and /dev/mapper/*?
>If yes, try the mdadm and lvm commands in /sbin.
>If the above two work, perhaps adding a rootdelay=x to the kernel line
>will fix your problem because it might just be a question of timing.
>(I meant the scripts in /scripts)

At the busybox shell, something like: 

# lvmdiskscan
# lvm vgs
# lvm vgchange -ay # should activate all
# exit

Then run update-initramfs once (if) the box boots.


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