Synology RX1214/RX1214RP delivers an effortless solution for volume expansion & data backup for Synology Rack Station. The RX1214/RX1214RP seamlessly scales up the storage capacity of the Synology Rack Station by an additional 12 hard drives on-the-fly when connected directly to an expansion cable. Plug-n-Use Design for Seamless Storage Space Upgrade Online Volume Expansion SATA III 6 Gb/s Interface Support Redundant Power Supplies Ensure Service Uptime (RX1214RP only) Energy-Saving Deep Sleep Mode Easy Installation with Screwless Rail Kit (optional) Managed from Synology Disk Station Manager (DSM) When running out of hard drive capacity on the Synology Rack Station, Synology RX1214/RX1214RP provides an easy way to immediately scale capacity by additional 12 hard drives. The RAID volume on the Synology Rack Station can be expanded directly without having to reformat the existing hard drives, ensuring the Synology Rack Station continues its service during the capacity expansion. Synology RX1214/RX1214RP can be used as a dedicated local backup solution for the Synology Rack Station. When created as a separate volume, the Synology RX1214/RX1214RP provides a great backup solution to its local hard disks in case of system failure.