Here is the log from the Host *Thread-1821::DEBUG::2012-04-13 12:18:52,200::BindingXMLRPC::167::vds::(wrapper) [192.168.11.236] Thread-1821::ERROR::2012-04-13 12:18:52,200::BindingXMLRPC::171::vds::(wrapper) Unexpected exception Traceback (most recent call last): File "/usr/share/vdsm/BindingXMLRPC.py", line 169, in wrapper return f(*args, **kwargs) File "/usr/share/vdsm/BindingXMLRPC.py", line 571, in poolValidateStorageServerConnection return pool.validateStorageServerConnection(domType, conList) File "/usr/share/vdsm/API.py", line 897, in validateStorageServerConnection return self._irs.validateStorageServerConnection(domainType, AttributeError: 'NoneType' object has no attribute 'validateStorageServerConnection' Thread-1822::DEBUG::2012-04-13 12:18:52,333::BindingXMLRPC::167::vds::(wrapper) [192.168.11.236] Thread-1822::ERROR::2012-04-13 12:18:52,334::BindingXMLRPC::171::vds::(wrapper) Unexpected exception Traceback (most recent call last): File "/usr/share/vdsm/BindingXMLRPC.py", line 169, in wrapper return f(*args, **kwargs) File "/usr/share/vdsm/BindingXMLRPC.py", line 491, in poolDisconnectStorageServer return pool.disconnectStorageServer(domType, conList) File "/usr/share/vdsm/API.py", line 823, in disconnectStorageServer return self._irs.disconnectStorageServer(domainType, self._UUID, AttributeError: 'NoneType' object has no attribute 'disconnectStorageServer' * --Christian