The N4100PRO also improves on its predecessor by adding RAID 6 and RAID 10, providing users have even more options for data storage. What's more, the N4100PRO also supports RAID expansion, allowing users to add more storage to their RAID volumes as their needs arise. With the N4100PRO, users have the flexibility to store their data their way. CPU: AMD Geode LX800 Memory: 256MB DDR400 SDRAM 2 x GbE Intel 82541 Interface 2 x 16 LCM Module 3 x USB 2.0 Host Mode (2xFront, 1xRear) 4 x Hot Swappable Disk Tray