Synology DiskStation 5-Bay Diskless Network Attached Storage (NAS) with iSCSI/DS1513+ (DS1513+) Four LAN Ports with Link Aggregation Support Scale Up to 60TB with Synology DX513 Expandable RAM Module (Up to 4GB) CPU Passive Cooling Technology and System Fan Redundancy VMware, Citrix, Microsoft, Hyper-V Ready High Availability and Automatic Failover by SHA Powered by Synology Disk Station Manager (DSM)