Ubuntu

Can't boot after changing the root volume group

Asked by tearsforhari

I was trying to change the name of my root volume group:

>cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.5 LTS"

>uname -r
3.2.0-101-generic-pae

>sudo -i

>vgrename /dev/Tear /dev/Tears
>
>reboot

Now, I get the grub rescue prompt. So, I booted from the Live CD to changed it back to the old name:
(#bash)--optional
(#apt-get install lvm2)--optional
#lvm vgrename Tears Tear
#reboot

And, everything is back to normal. However, I would like to know why it didn't work in the first place?

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Manfred Hampl (m-hampl) said : 		#1

I assume that the volume group name is referenced by the grub boot files.
If you just rename the volume group and not do anything else, I assume that the grub boot loader still searches the system by using the old name.
Try renaming the volume group, and the run sudo update-grub
If this does not work either, you already know how to repair.
(Maybe even more changes are required.)

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