29RX1213SAS Published October 9, 2014 at 230 × 230 in Synology Expansion Unit, (RX1213sas) 12-Bay 3.5″ Diskless NAS (2U Rack) (ENT) Synology Expansion Unit, [29RX1213sas] 12-Bay 3.5″ Diskless NAS (2U Rack) (ENT) for Scalable Models