Thunderbolt, originally dubbed “Light Peak”, is a dual-protocol interface that combines PCI-Express and DisplayPort into one metaprotocol with bi-directional speeds of up to 10Gbps. The technology makes even the relatively speedy USB 3.0 interface (5Gbps) look downright pokey by comparison.
What would you do if you were a storage company and had this next-gen I/O technology in hand? Probably more or less what Western Digital has done, which is to make an external storage device that teams Thunderbolt’s impressive interface bandwidth with a pair of the company's fastest 1TB VelociRaptor 10,000RPM HDDs. WD calls it the My Book VelociRaptor Duo.