Need more space for data? This DualBay USB 2.0 external enclosure combines up to 2x SATA I or SATA II 1000 gigabyte (GB) hard disks each for a massive 2.0 terabyte (TB). The Dual Bay SATA Hot Swap JBOD Enclosure supports two hard drives of different sizes, brand & RPM so no need to waste puny smaller hard drives. A built-in powerful 4 x 4cm fan, provides excellent cooling and reliable operation. Also, the One Touch Backup and Secure Door with lock to ensure the safety of your precious data.1
(http://www.thinkgeek.com/images/products/front/dual_bay_jbod_enclosure.jpg)
http://www.thinkgeek.com/computing/drives/a227/