At the moment I'm in a bit of dilemma because I know that Windows 2012 supports "Shared Nothing Live Migration" but recently I got to know that this feature is available for stand alone Hyper-V Servers. My Setup is that I have 3 Servers running Windows Server 2012 Hyper-v Failover Cluster and I need to migrate everything to a new cluster running on Windows Server 2012 R2 and offcourse some VMs can't be turned off during migration so I need to do this live during production hours. Another note is that both clusters will be running on the different LUNs since each cluster has its own CSVs. I need to know if it is possible to migrate such VMs/Roles Live without have any downtime of the VMs/Roles?
Ok so basically I managed to migrate VMs from a cluster to another cluster. These are the steps, First you have to remove the VM from the Failover Cluster Manager, this will still appear in the Hyper-V manager. Once it is no longer protected by Failover Cluster you can use the Move VM from the Hyper-V manager and move it to any host you want.