Oracle VM 3.4 Manager fresh installation
Video showing the process of installing a fresh and clean OVM Manager with a most recent version, allowing to recover from a total lost of the old server with the manager.
Also a good way to upgrade the manager instead of using the old server, you can install a new one.
Things you can't forget and are required:
The hostname and IP address(es) of old server
The manager UUID owner of the server pool
The OVS agent password on the OVM servers