Synology DiskStation 8-Bay (Diskless) Network Attached Storage (NAS) DS2015xs Excellent performance of 2095 MB/s sequential read throughput and 59185 sequential read IOPS1 2 x 10Gbps SFP+ ports and 2 x 1Gbps RJ-45 ports with Failover and Link Aggregation support Scale up to 20 drives with Synology DX12152 Expandable RAM module (up to 8GB) High Availability and SSD cache support Backed with next business day replacement service3 VMware Citrix and Microsoft Hyper-V certified Running on Synology DiskStation Manager (DSM)