[Fedora-xen] Slightly off-topic question about Xen+LVM

[Aaron Metzger]

First let me say that I love the way virtualization has been integrated 
into Fedora!  Thanks to all who have done this work.

I have a simple question which is a little off-topic but I know that the 
experience is contained in this group of folks.

Using the final release of Fedora 8 plus all released patches, I created 
an LVM volume group and an Ext3 logical volume upon which I am storing 
all of my Xen virtual machine images as normal files.

I tried to use the system-config-lvm tool to create a snapshot of the 
logical volume and assigned it to a mount point that I created under 
"/mnt/vmbackups" and checked the box to have it mounted at boot time.

When I rebooted the machine, the boot failed when It tried to access the 
snapshot logical volume.  I'm not going to include the specific errors 
here because my question is much more general.

Do snapshots of logical volumes work under Fedora 8?  Google revealed 
some historical discussions about snapshots not working in the 
transition from LVM1 to LVM2.  Is that the case?  Is anyone successful 
creating logical volume snapshots under Fedora 8?

Alternatively, is there any other reliable way to make a self-consistent 
copy of a running Xen virtual machine image for the case where the Xen 
virtual machine is held in a regular file system file?  Is LVM my only 
option?

Thanks in advance for any and all help.

--
Aaron