[ovirt-users] Cloud-init confusion

Hi Users, I am new to oVirt and having some confusion with cloud-init. I have a VM which supports Cloud Init and when I enable Cloud Init under Initial boot settings of VM, the cloud-init config disk isn't attached to the VM. If I use Run-Once and enable Cloud-Init the config disk is attached to the VM and works as expected. Is cloud-init only supposed to work with Run-Once or am I missing something? Thanks in advance. Shantur