RS18017xs+ is built for flexible storage management with ultra-high performance at over 568,000 sequential read IOPS and 4,800 MB/s sequential read throughput1. DDR4 ECC RDIMM and 10GbE connectivity guarantees data accuracy and performance for mission-critical environment. RS18017xs+ provides flexible storage scalability with the free combination of Synology Expansion Unit RX1217sas and RX2417sas2. Up to 7 Expansion Units can be connected, allowing business to start small and scale big.