Buffalo"s TeraStation 5400RN Rack mount is a high-performance four-drive 1U network storage device ideal for businesses and demanding users requiring a reliable RAID-based network storage solution for larger networks and business critical applications. With the powerful Intel Atom D2550 processor, TeraStation 5400RN provides exceptional performance during file transfers and everyday NAS functions. Increased reliability is achieved with the Testation 5400RN being populated with hard drives built specifically for always on NAS devices. TeraStation 5400RN runs many services simultaneously and the dynamic combination of the dual core 1.86 GHz processor and 2 GB DDR3 RAM enables the acute ability to focus on concurrent tasks with minimal performance degradation. TeraStation 5400RN is packed with business class features such as Active Directory support, disk quota support, share level replication, failover support, dual gigabit Ethernet ports, hot-swap hard drives, iSCSI targeting and USB 3.0 accessory support.