"In the past couple years, compared to years before that, we have seen huge advances in the hard drive market. From 250GB in 2003, to 300GB, to 400GB, and now 500GB hard drives starting to be announced. Not only has overall size or platter size become bigger and better, increased cache sizes, and technologies such as NCQ have also emerged. Because of this, computer enthusiasts have to take a better look at what their buying when it comes to a HD just as they would when buying a power supply or even a graphics card.
So today we will review two of the biggest hard drives currently on the market. The 400GB Hitachi Deskstar 7K400 which features five 80GB platters, 8MB of cache, a 7,200RPM rotation speed, and a 8.5ms average seek time. We will also look at the 400GB Seagate Barracuda 7200.8 which carries basically the same specifications as the Hitachi drive except that the Seagate has a 8ms average seek time rather than 8.5. Both the drives in this review use the SATA 1.5Gb/s interface however they are also available in PATA if needed."
Read the rest here.