libvirt users - Mar 2010 - Problems with a logical pool creation

Hi all,
I am new in virtualization so forgive me any evidence.

After pool definition, when I try to create a logical pool I obtain the
following error:

# virsh pool-define vms.pool.xml
> Pool vms.pool defined from vms.pool.xml
>
> # virsh pool-start vms.pool
> error: Failed to start pool vms.pool
> error: internal error '/sbin/vgchange -ay vms.pool' exited with
non-zero
> status 5 and signal 0:   Volume group "vms.pool" not found
>
Is anything wrong with my xml file?

<pool type="logical">
>   <name>vms.pool</name>
>
  <source>
>     <device path="/dev/sda2"/>
>   </source>
>   <target>
>     <path>/var/lib/virt/images</path>
>   </target>
> </pool>
>
Are pools created in this way permanent?

Thank you!

Jenaro Percal
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