[Users] oVirt 3.4.0 issues with storage

Hi all, I upgraded to 3.4 beta this evening and seem to have developed a problem with the storage domains. I seem unable to bring them online getting the error in the console "Failed to activate Storage Domain". Also alongside this error is a warning, "Invalid status on Data Center local_datacenter. Setting status to Non Responsive" Anyone seen this? Or any ideas? Thanks Jon