Optimized for enterprise-level high-capacity storage applications, Supermicro's SC846 chassis features 24 hot-swap 3.5" SAS/SATA hard drive trays and 2 fixed internal hard drive bays in a 4 U space. The SC846 design offers maximum HDD per space ratio in a 4 U form factor, high power efficiency, optimized HDD signal trace routing and improved HDD tray design to dampen HDD vibrations and maximize performance. Equipped with 900 W or 1200 W high-efficiency redundant power supplies and 5 hot-plug redundant cooling fans the SC846 is a reliable and hassle-free maintenance storage system.