hard drive

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The Icy Dock MB662US-2S is another dual drive enclosure, and you can get it in two flavors, depending on whether you use eSATA or FireWire 400/800 connections. Both versions also sport a USB 2.0 port. When you plug two drives into the Icy Dock, it can treat them as two independent drives or as either a RAID 0 or RAID 1 drive (you use a dip switch to set the mode). In RAID 0, the two drives act as a single big, utrafast volume—but if either drive fails, your data is toast. In RAID 1, the two drives are automatically mirrored, meaning the Icy copies your data to both drives. The instant, automatic backup is a protection against either drive biting the dust. The Icy Dock keeps drives cool thanks to a fan with selectable speeds, but the fan makes almost as much noise as the Mac Pro we tested it with.