[ovirt-users] Data Centers status Not Operational

Hi everyone, I found 3 servers (HV1, HV2, HV3) that contains VMs at another servers room. These servers are hosts based on KVM. I logged into oVirt Engine Web Administration. Data Centers tab show me only one entry Name: RCV Storage: Shared Status: Not Operational Compability Version: 3.4 Description: [Empty] Webbrowser oVirt Engine Web Administrator show me oVirt Engine Version: 3.4.0-1.el6 One VM on HV3 has stopped, Hosts tab show Non Responsive Status for every host (HV1-3); every VM in Virtual Machines tab show Unknown status. What do I'll do to change status in Data Center? How to start debug the reason? Last administrator leave documentation in vestigial form :) DataCenter: RCV -->Cluster: RCV_Cluster ---->Host: HV1 node ---->Host: Hv2 node ---->Host: HV3 engine Best regards, nexpron