How Perpendicular Recording Works
 

Summary: Everything you need to know about the new perpendicular recording hard disk drive technology.

Here is a snippet: "The majority of hard disk drives found on the market today use a recording technology called longitudinal, where bits are stored side by side on the magnetic surface. This recording technique has been used since the first hard disk drives. A new recording technology, called perpendicular, is being used on newer hard disk drives, allowing a higher recording density. In this tutorial we will explain you everything you need to know about perpendicular recording and how data is stored on the hard disk drive magnetic surface."

Link: http://www.hardwaresecrets.com/article/347