Hi - Newbie here. I have purchased a DS720+ with 2x6TB seagate HDD. I can only get one of the disks operating properly, notwithstanding the disk manager confirms both are healthy (only one initialised). The 'faulty' disk has a reconnection count of over 300. Is this a problem with the disk or the way it is seated in the NAS? I've tried removing it and reseating it but no joy. All assistance gratefully received.