Not sure if this is exactly your issue, but this post here: http://comments.gmane.org/gmane.comp.emulators.ovirt.user/12200 might lead you in the right direction.

"one note - if you back it up while its attached to an engine, you will 
need to edit its meta data file to remove the association to allow the 
other engine to connect it to the new pool for restore."

Steve Dainard

On Tue, Jan 28, 2014 at 12:41 PM, Juan Pablo Lorier <jplorier@gmail.com> wrote:

Hi,

I had some issues with a gluster cluster and after some time trying to
get the storage domain up or delete it (I opened a BZ about a deadlock
in the process of removing the domain) I gave up and destroyed the DC.
The thing is that I want to add the hosts that where part of the DC and
now I get that I can't as they have the volume. I try to stop the volume
but I can't as no host is running in the deleted cluster and for some
reason, ovirt needs that.
I can't delete the hosts either as they have the volume... so I'm back
in another chicken and egg problem.
Any hints??

PD: I can't nuke the hole ovirt plataform as I have another DC in
production.... otherwise I would :-)

Regards,

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