The 5N2 is the successor of the 5N, which we've already reviewed last year. On the inside there is now an upgraded quad core SoC running at 1.6GHz (1.2GHz with the 5N) making sure there is enough processing power and apart from that there are two 1 Gigabit Ethernet interfaces (1 interface in the 5N) for quick transfers. Drobo is keen on making their NAS as easy to use as possible. One key feature is the possibility to add disk drives of different sizes to an array.