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MacBook Pro eSATA with Hitachi 7K2000 2TB Hard Drive
Read performance is nearly as fast as the 7K2000 can go with the OWC Slim and the Sonnet Tempo Pro, but lags with the Sonnet Edge.
With a single hard drive, write speed is not far off the top speed of about 125MB/sec, except that the Sonnet Edge lags the other two cards.