I have cent OS with XEN installed on a blade server. After installing Cent OS I changed its Volumegroup from VolGroup00 to VolGroup01 using command 'vgrename' as I needed to access the Volgroups of VMs I was going to install on this base cent os. After this everything worked fine, and I achieved my objective. But this weekend there was power shutdown in our lab and today when booted these blade servers, CentOSes installed on them are not coming up. Error was 'could not found VolGroup00, unable to locate */dev/root*'. So system was rebooting again and again.
From this error I realized that in boot path it would still VolGroup00 and that's what causing the problem. So at the time of booting by editing kernel lines I changed VolGroup00 to VolGroup01. But this time it threw error which said, 'Found Volgroup01, could not find VolGroup00 and could not locate /dev/root. I can't understand why it is still searching for VolGroup00.
There must be some mapping which still points to VolGroup00 for the location of /dev/root. I think it is in /etc/fstab which ideally should be changed by 'vgrename' command but somehow it didn't. So can I solve my problem? If yes, How?