Hitachi Deskstar 7K1000 in RAID 0: Is Two Terabytes really better than One?
 

In our first look at Hitachi's new Deskstar 7K1000 we thought it was the best 7200rpm drive that has passed through our labs. Throughout testing we found the performance of the drive to be very balanced across a broad spectrum of benchmarks that stressed write and read speeds, or a combination of both. This unique blend of performance and capacity also comes at a fairly reasonable price of 40 cents per-Gigabyte or approximately $399 for the drive although two 500GB drives can be had for around $250 now.

http://www.anandtech.com/storage/showdoc.aspx?i=2969