Using a non-cluster-aware tool (such as virsh or xm) to manipulate a virtual machine's state or configuration while the cluster is managing the virtual machine. Checking the virtual machine's state is fine (e.g. virsh list, virsh dumpxml).

Migrating a cluster-managed VM to a non-cluster node or a node in the cluster which is not running rgmanager. Rgmanager will restart the VM in the previous location, causing two instances of the VM to be running, resulting in file system corruption.