Seagate Barracuda ATA V Plus (7200RPM) - 4.0 out of 5 stars
The Seagate Barracuda ATA V Plus boasts of a native serial ATA controller that supports the SATA command queuing function. With a large 8MB buffer and a maximum capacity of 120GB, just how fast is this drive?
Quotes:
Overall, the performance of the drive is not very impressive. With Winbench 99, we saw the drive performing slower than most other drives based on the same platter density and buffer size. Even more disappointing is the fact that there's little or no advantage with serial ATA over older parallel ATA drives. Perhaps the Barracuda SATA V has not yet fully taken advantage of the serial ATA bandwidth.
http://www.hardwarezone.com/articles/articles.hwz?cid=10&aid=697