[tomek@vz]

Western Digital has given their hard drive line-up a makeover, with the company rebranding all Green drives to Blue drives in an effort to make it "easier for customers to choose the right drive for their PC."

http://www.techspot.com/news/62598-w...-branding.html

U principu:

Western Digital suggests that the best way to do so is look at the last letter in the model number: if it's "X", you're getting a 7,200 RPM drive; but if it's "Z", it's going to be 5,400 RPM.