Most Drives have a Label with schematic on them that shows the jumper settings. If
not Google the Drive, and find out more details. The Manufacture of the Drive may
have the information. Every Manufacture has somewhat different way to do it. Link
has some pictures you can click on.
http://images.google.com/images?hl=en&q=hard+Drive+jumper+settings&um=1&ie=UTF-8&sa=N&tab=wi