[ovirt-users] Are there some general strategyhow to Iscsi strorage domain?

Hi, I have 2x40TB domains each are exported with iser/iscsi with ib and 10Gb interfaces. For sure they are RAID6 storage little bit save on failure. But I was wondered if any way to backup those domains. particularly master one. I was thinking somehow DRBD based replication, with lvm snapshots etc. But it looks like overkill. Will be nice somehow to deploy replicated/HA Master domain with ability to backp on tapes as well. Any ideas are welcome. Thanks, Arman.