Western Digital - ShareSpace Network Storage System

This high-speed network-attached storage system with capacities up to 8 TB and a space-saving footprint gives you all the benefits of a big time data center without the need for a big time IT department. Perfect for centralizing and sharing data and multimedia files on a small office or home network.

Big capacity, small footprint - Offered in 2, 4 and 8 TB capacities, this small-footprint four-bay system takes up very little space and provides plenty of storage to go around.
RAID capability - Offers multiple RAID configurations for data protection and speed -- RAID 0 (Striped), RAID 1 (Mirrored) and RAID 5. The RAID 5 mode, only available on the fully-populated 4-drive system, is the recommended mode to achieve both high-performance and data protection through redundancy.

The 4 and 8 TB WD ShareSpace systems are shipped in RAID 5 mode for maximum reliability.

The 2 TB WD ShareSpace system is shipped in Spanning Mode for maximum capacity and the flexibility to add additional drives without reformatting the system.

Features and Specifications : http://www.wdc.com/en/products/products.asp?driveid=584