Synology Rack Station 4-Bay Network Attached Storage with iSCSI (RS815RP+) Four Gigabit LAN Ports with Failover and Link Aggregation Support Scale up to 8 Drives with Synology RX415 Expandable RAM Module (Up to 6GB) Redundant Power Supplies Ensure Service Uptime High Availability and SSD Read/Write Cache Support VMware , Citrix , and Microsoft Hyper-V Certified Running on Synology Disk Station Manager (DSM)