Synology RackStation RS818RP+ 4 x Total Bays SAN/NAS Storage System - 1U - Rack-mountable - Intel Atom C2538 Quad-core (4 Core) 2.40 GHz - 4 x HDD Supported - 48 TB Supported HDD Capacity - 4 x SSD Supported - 2 GB RAM DDR3 SDRAM - Serial ATA Controller0, 1, 5, 6, 10, Basic, Hybrid RAID, JBOD - 4 x 2.5"/3.5" Bay - 1 x Total Slot(s) - Gigabit Ethernet - eSATA - 2 USB Port(s) - 2 USB 3.0 Port(s) - Network (RJ-45) - DiskStation Manager - iSCSI, DLNA, AFP, CIFS, Kerberos, FT