I found this video on metacafe and its really interesting how the head of hard disk drive moves when we are working on our computer. The video shows the movement of head during copy paste, delete and quick format.
Enjoy the internal working video of hard disk drive!
click on the link will open a new page, on that page click on FREE DOWNLOAD. Than wait for the timer and after the timer a DOWNLOAD link will appear. clicking on that link will start the download.