When Seagate told us it would be shipping the first 6Gb/s SATA hard drive, we were a little surprised. And when we found out it wasn’t going to be a solid state drive, but a 7,200rpm Barracuda drive, our skepticism increased. Sure, we’d been waiting a long time for Seagate’s 2TB 7,200rpm drive, and it’s nice to see the SATA 6Gb/s spec ship on a real-world product, but putting a 6Gb/s controller on a mechanical hard drive is like putting a Formula 1 airfoil on a golf cart. The vehicle just ain’t ever going to go fast enough to warrant the accessory.
In order to test the Barracuda XT on a level playing field, we built a new rig: a 2.66GHz Core i5-750 and 4GB of DDR3 RAM on an Asus P7P55D-Premium motherboard, which has an onboard Marvell SATA 6Gb/s controller as well as an Intel 3Gb/s SATA controller. The rig runs Windows XP SP3 and 64-bit Vista Home Premium from a 300GB WD Raptor. We tested both the Barracuda and its closest competitor, the 2TB WD Caviar Black, on both the Marvell and Intel controllers.

Continue reading this review after the jump.