[Fedora-xen] Accessing data on a xen guest disk image

[Dennison Williams]

Mark Nielsen wrote:
> Let me ask this first: what is it exactly that you are trying to do? If
> you are trying to mount a guest disk on dom0, why?

I am trying to recover the data located on my guest disk.  This guest
disk is a logical volume in dom0.  The guest disk and the dom0 disk are
managed by LVM each with the same naming convention
(VolGroup00/LogVol0[0-1]).

> 
> The times I've needed to access a VMs disk has been when something
> terrible has happened to the VM and I've needed to mount the VMs disk so
> I can recover information of try to fsck it. I do this by having a
> stand-by VM that uses a different naming convention that my other VMs
> use. This way I can use my test/rescue VM to mount up the other VMs
> disks and fsck them, or recover data from them.

I am unclear about how I could access a LV on dom0 from a domU VM.  Can
you explain how this would be done?