lvm lvrename on Fedora Core 4

[Jeff Vian]

On Mon, 2006-01-09 at 08:08 +0000, Paul Howarth wrote:
> On Sun, 2006-01-08 at 21:08 -0500, Robert L Cochran wrote:
> > On my shiny new FC4 system, mount reports this device to be mounted on 
> > root "/":
> > 
> > /dev/mapper/VolGroup00-LogVol00
> > 
> > And I assume that this is most of my hard drive except for /boot (which 
> > is /dev/sda1) and swap. Would renaming this with 'lvm lvrename' offer me 
> > any benefit? For example rename it to
> > 
> > /dev/mapper/VolGroup05-LogVol10
> 
> I'd have thought "vgrename" would be sufficient - there shouldn't be any
> need to rename the LVs once the VG is renamed.
> 
> If you do do this, check that /etc/fstab contains LABEL= lines to
> identify mount points rather than hardcoded device names
> like /dev/mapper/VolGroup00-LogVol00 or /dev/VolGroup00/LogVol00; if it
> doesn, you'll need to edit those too.
> 
If it *does* contain the LABEL= lines and the second VG also contains
LVs with the same label this still will be a problem.

To avoid conflict of labels he also will need to change any LABEL= lines
in fstab to reflect the device name instead.

On mine, the lvm devices have the device names in fstab and do not use
the LABEL= syntax.

> > My previous FC4 system has an LVM spanning 2 physical disks and it is 
> > going to be truly inconvenient to mount these disks on my current system 
> > and get at the contents of the data on them. I've forgotten to back up 
> > several important files to a DVD before doing a hardware upgrade that 
> > includes using only one Great Big Hard Drive, and I'm feeling the pain.
> > 
> > So would renaming my current LVM make it easier to get my old drives 
> > (which are currently sitting around unused) mounted and accessible?
> 
> Yes, I would think so.
> 
> Paul.
>