CentOS - Sep 2010 - vgrename, lvrename

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 some googling and found out that other folks have had
problems with mkinitrd, but I haven't gotten that far yet.

Made a wild guess and killed my nautilus process, a lot of stuff
disappeared from the desktop, then reappeared along with a new
nautilus process.

Still googling, but haven't found anything useful so far.

Any idea?
-- 
Drew Einhorn

"You can see a lot by just looking."
  --  Yogi Berra
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.centos.org/pipermail/centos/attachments/20100911/5235c721/attachment-0001.html>

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.

>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
If its mounted you'll need to unmount it before you can deactivate it, and
if
its in use you wont be able to unmount it....  


I'm guessing that with a  name like VolGroup00/LogVol00 its probably the
root
filesystem so probably the best procedure is to boot from your live CD, then 

umount /dev/VolGroup00/LogVol00
and you should then be able to deactivate it then do your lvrename/vgrename 
stuff

You'll also need to change any entry it may have in /etc/fstab before you
reboot
back onto the internal disks, or it wont mount on bootup and if its the root 
filesystem thats pretty fatal!

chris

On Sat, Sep 11, 2010 at 3:45 PM, drew einhorn <drew.einhorn at gmail.com>
wrote:
>
> 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 some googling and found out that other folks have had
> problems with mkinitrd, but I haven't gotten that far yet.
> Made a wild guess and killed my nautilus process, a lot of stuff
> disappeared from the desktop, then reappeared along with a new
> nautilus process.
Is VolGroup00/LogVol00 mounted?

Is VolGroup00/LogVol00 a swap partition that the Live CD is using?

At Sat, 11 Sep 2010 13:45:55 -0600 CentOS mailing list <centos at
centos.org> 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 some googling and found out that other folks have had
> problems with mkinitrd, but I haven't gotten that far yet.
> 
> Made a wild guess and killed my nautilus process, a lot of stuff
> disappeared from the desktop, then reappeared along with a new
> nautilus process.
> 
> Still googling, but haven't found anything useful so far.
> 
> Any idea?
*Don't* boot the GUI!  Boot into text mode.  Nautilus, etc. is not
started and won't be restarted.  Sometimes the GUI is not really easier,
it can in fact be much harder.

You should be able to login as root and use the CLI to do what you need
to do.

Note: in the case of mkinitrd, you will need to rebuild your initrd if
you expect to actually boot the machine after renaming the volume group
and logical volumes. You'll need to *manually* mount the root and /boot
(at least) someplace (eg under /sysroot), then chroot there. Don't
forget to fix /etc/fstab and /boot/grub/grub.conf (root=...).

-- 
Robert Heller             -- 978-544-6933
Deepwoods Software        -- Download the Model Railroad System
http://www.deepsoft.com/  -- Binaries for Linux and MS-Windows
heller at deepsoft.com       -- http://www.deepsoft.com/ModelRailroadSystem/

On 09/11/2010 08:45 PM, drew einhorn wrote:
> 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.

Rather than the livecd, you might want to just boot the installer into 
rescue mode. You will have none of the issues you ran into.

- KB