Seagate's Barracuda nOO.ll 500 GB posted the highest Drive Index score, followed very closely by Western Digital's Caviar 320 GB and Seagate's nOO.ll 750 GB. These three drives have significantly better sequential read and write speeds, and they overshadow other drives.

Despite lower interface speeds, the WD Raptor does deliver when it comes to random read I write operationbetter access times make up for the lower interface speeds. WD's RE2 750 GB posted better scores across the various sub-tests and is one of the better drives other than the Seagate nOO.ll drives. Overall, the Seagate Barracuda nOO.ll 500 GB came out as the winner.

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