Do you demand portability from your Redundant Array of Independent Disks? Then you've probably already seen Sonnet's Fusion F2, with its two 1TB drives and eSATA connector. Today the company introduces the Fusion F2QR, which also features two 2.5-inch, 1TB hard drives -- but now comes with four interface options. You've got your eSATA, of course, but also Firewire 400, Firewire 800 and USB 2.0 connectors. There's a new built-in RAID controller that smooths configuration as well, and the aluminum case and fanless design keep noise to a minimum. All of that fits in a shell measuring 5.9- x 6.1- x 0.95-inches. This slender slab of storage is available now and will set you back $569.

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