On Mon, Jan 1, 2018 at 9:19 PM, Andrei V <andreil1(a)starlett.lv&gt; wrote: Actually it was introduced in 4.1.5: https://www.ovirt.org/release/4.1.5 <https://www.ovirt.org/release/4.1.5> In 4.1.7 it was also introduced libgfapi support during Hyper Converged Self Hosted Engine deployments: https://www.ovirt.org/release/4.1.7 https://bugzilla.redhat.com/1471658 So it should be inherited in 4.2 too. There were a bug related to live storage migration that actually seems not solved yet: https://bugzilla.redhat.com/show_bug.cgi?id=1306562 The first link that you provided gives also the way to enable it for already existing environments that has been upgraded. I'm going to try myself on a cluster upgraded from 4.1.7 to 4.2 where I had not enabled it yet and report HIH, Gianluca