[ovirt-users] How to delete/detach a disk from online VM ?

Hello. Is it possible to remove a (unmounted, unused) disk from a VM when online? I tried via the UI and I get 'Error while executing action: Cannot remove Virtual Disk. At least one of the VMs is not down.' I know you can with standard KVM/Libvirt/virt-manager - is there any way I can remove a disk from a VM whilst it is online in Ovirt ? Thanks