[CentOS] vgrename, lvrename

Sat Sep 11 20:07:01 UTC 2010
John R Pierce <pierce at hogranch.com>

  On 09/11/10 12:45 PM, drew einhorn wrote:
> Hi,
>
> I want to rename some volume groups and logical volumes.
>
> I was not surprised when it would not let me rename active volumes.
>
> So I booted up the system using the CentOS 5.5 LiveCD,
> but the LiveCD makes the logical volumes browsable using Nautilus,
> so they are still active and I can't rename them.
>
> Tried:
>
> /usr/sbin/lvchange -a n VolGroup00/LogVol00
>
> but it still says:
>
>    LV VolGroup00/LogVol00 in use: not deactivating

did you try booting the liveCD in single mode?  in grub, add the word 
'single' to the kernel line...  that won't mount anything.