TeraStation Duo is Buffalo's new entry into the professional line of TeraStation storage devices. It is nearly feature identical to Buffalo's successful TeraStation III, but houses only two hard drives instead of four. It includes all firmware features presently found in the Buffalo lineup of NAS products. Especially, business oriented features, such Active Directory support, DFS support, disk quota support, a share level replication feature and port trunking make the TeraStation Duo a top choice for small to medium sized businesses. Hardware features like hot swap and dual Ethernet ports add to the list of new features. Reliability and performance are the key design criteria for the TeraStaion Duo. A heavy-duty power supply and over-sized cooling system, as well as vastly improved CPU speed guarantee excellent and reliable performance. It is the clear choice for those users who desire maximum reliability and robust features.