The brand new Deskstar 7K1000 offers more than just a lot of space on multiple platters.  Hitachi has incorporated perpendicular storage, which allows all of that storage space to fit on 4 disks.   The 32MB memory buffer pushes the performance up to the level of a Raptor for some tests, but not when it comes to some transfers.  Tech Spot is more than happy to tell you all about it here.
“The Deskstar 7K1000 represents a milestone for Hitachi and for the hard drive industry as a whole, as it is the first drive to offer a 1 terabyte capacity. However, Hitachi has not simply grabbed five 200GB platters and stuck them together to create a 1TB hard drive. Rather, there is much more to the Deskstar 7K1000, such as its Serial ATA II interface and the massive 32MB memory buffer. This is also the first desktop Hitachi drive to feature PMR technology (Perpendicular Magnetic Recording).”

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