http://www.netgear.com/Products/Storage/ReadyNAS3200/RN12P0610.aspx It's a 2U, 12 SATA-disk server. You could load it with 1TB drives for 12TB. The software's pretty good (based on Linux) and constantly being updated.
The first time, it's a KLUDGE! The second, a trick. Later, it's a well-established technique! -- Mike Broido, Intermetrics