Synology RackStation 4-Bay (4x 3TB NAS Drives) Network Attached Storage (NAS) RS815+ 4300 Four gigabit land ports with failover and link aggregation support Scale up to 8 drives with synology rx415 Expandable ram module (up to 6gb) High availability and ssd read/write cache support VMware , citric , and Microsoft Hyper-V certified Running on synology disk station manager (dsm)