I want to migrate about 100-200 VMs from one oVirt deployment to a new oVirt deployment.  Some of the VMs are over 3TB in size.  Exporting and importing these via NFS would involve downtime and probably be a very lengthy process.  I'm wondering if there's a way to get around this by using san replication.

I have an equallogic san group currently in use by an oVirt installation 3.4.0-1.el6.  I have a different equallogic group set up as storage for a different oVirt installation on another network.  The new oVirt installation is version 3.6.4.1-1.el7.centos.

My idea is to avoid the downtime and lengthy export/import process by telling my current production san to do volume replication to the new san that's been allocated for use as storage for our new oVirt installation.  Once replication is in sync, I'll have exact copies of the original iSCSI volumes, VM's, metadata, etc.  I am hoping I can then break replication, tell my new oVirt installation to log into the freshly-copied volumes, and use the VMs that were previously in use on the other installation.

Due to the differences in oVirt versions and not knowing how oVirt internally handles metadata, I am not sure if this is possible.  Can anyone confirm if this will work or not?

Thank you all!