Synology RX1217sas Expansion Unit, 12x Drive Bays, 3.5″ & 2.5″ SAS/SATA Hard Drive Compatible, Hot Swappable Drive, Dual Redundant 500W Power Supply,

RX1217sas Easily add 12 additional drive bays to Synology FlashStation or RackStation. Supporting both 2.5″ and 3.5″ SAS/SATA drives, the RX1217sas is a flexible solution supporting on-the-fly volume expansion or serving as a local backup destination. Dual power supplies ensure continuous service uptime. Easily replace defective drives with the hot-swappable drive trays. Key Features Drive Bays 12 Compatible Drive Type: 3.5″ SAS HDD, 2.5″ SAS HDD, 2.5″ SAS SSD, 3.5″ SATA HDD, 2.5″ SATA SSD Maximum Internal Raw Capacity 120 TB (10 TB drive x 12) (Capacity may vary by RAID types) SAS IN-port 1 SAS OUT-port 1 Power Supply Unit / Adapter 2x 500W AC Input Power Voltage 100V to 240V AC Power Frequency 50/60 Hz, Single Phase Operating Temperature 5°C to 35°C (40°F to 95°F) </li