TechwareLabs posted a review on the Seagate Barracuda 7200.9 harddisk

Today, once again we take a look at one of the biggest hard drives currently out there, the Seagate Barracuda 7200.9 500GB. The model is the ST3500641AS, it is a Serial ATA II drive with 16MB of cache, 7200 RPM, four 125GB platters, 8.5ms seek time, and of course, Native Command Queuing. If you are still unaware of what NCQ is exactly we will go over it briefly on the next page. Otherwise, you can skip to page three and let's get going and take a look at this mammoth of a drive.

Seagate Barracuda 7200.9 Review