now with oVirt 3.5 there is also iSCSI with NFS as backed storage for Hosted Engine.

What is the limitation about the storage domain? The integration in setup scripts or due to storage type itself in engine mgmt?

What I mean is: if in some way one initially configures the engine on an external server (physical or virtual), could then be feasible migrating it "manually" in the oVirt environment (with backup/restore steps)?

Is there any plan to add for example in 3.6 another storage domain type such as local posixfs, or some other type to be able to realize sort of vSphere vSAN infrastructure for small/labs environments?

Gianluca