On Thu, Jan 17, 2019 at 4:53 PM Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:

Hello,

I have two different oVirt 4.2 environments and I want to migrate some big VMs from one to another. 

I'm not able to detach and attach the block based domain where are the disks of source.

And I cannot use export domain functionality.

you can export them to ova on some device that can later be mounted to the destination environment.

this is similar to the export domain functionality - but you didn't specify why the export domain functionality is not applicable for you.