On Mon, Dec 28, 2020 at 12:26 PM Strahil Nikolov via Users <users@ovirt.org> wrote:

Keep the export domain attached only to 1 environment at a time... it's way more safer. Usually each engine updates some metafiles on the storage domain and when both try to do it ... you got a bad situation there.

Attach to 4.3 , move VMs, power off them , detach the storage domain - so you can attach it to 4.4 and migrate those VMs. And don't forget the templates the VMs were created from.

Best Regards,
Strahil Nikolov

Trying to attach an export domain to a second infra should give you an error about being "already attached elsewhere" and prevent it.

It often happens to me using the same export domain to share resources between 3 different environments.

Not tried with heterogeneous env yet (eg activated on 4.3 and trying to activate in 4.4, or vice versa) but I think it should give the same error message.

Gianluca