Hello, Now I have done it. I was adding a new cluster and storage domain to my ovirt enviroment. At the end of the day I was sucsesful in doing so. Had some issues but after carefully reading the manuals got it working just fine. So now I have added a new CLUSTER002 with it's own datastorage DATA_2_DOMAIN. Then I started changing the existing default cluster name to CLUSTER001 and changing the network from VM to VM_ROMULUS and also changed the DATA_DOMAIN to DATA_1_DOMAIN. Apparently this is a bad idea as I can see all my VM's but can't start them because my ovirt enviroment tell's me the following : Cannot run VM. There is no host that satisfies current scheduling constraints. See below for details. And then nothing. So for now I 'm exporting importing the VM to my new DATA_2_DOMAIN from DATA_1_DOMAIN, which seems to work, to be able to start my VM as I need it realy quickly but how am I going to fix my optimistic changes ? Kind regards.