[ovirt-users] Stuck removing DataCenter, Hosts and Volumes

Hello List, I have a 2 node replica Gluster Cluster in a Datacenter which i want to remove completely. 1.) I put both nodes in maintenance and removed the DataCenter and the Storage unter the Storage Tab. But now i am stuck removing the Cluster, Hosts and GlusterVolume. a) When i try to remove the Cluster: Error while executing action: Cannot remove Cluster. Host Cluster contains one or more Hosts. b) When i try to remove the hosts: node1: Cannot remove Host. Server having Gluster volume. c) When i try to remove my Volume i get: Error while executing action: Cannot stop Gluster Volume. No up server found in Cluster_II. Any idea how to solve this? Thanks, Mario