>I covered it in heavy duty magnets and let them sit for a
>couple of days.
You might have had better luck if you had run the drive while it was covered in magnets. I did an experiment a few years ago with a 3.5 floppy and some <i>very</i> powerful rare earth magnets (you needed a screwdriver to get them apart). I found that I could ussually lay the magnets right on the disk. But if I moved the magnet around on the disk case, it screwed it up every time, eventually to the point that it wouldn't format again.
Yes, I was <i>very</i> bored!
Another good way to screw up a hard drive is to shake/knock the case around while the drive is accessing. It will sometime crash the read/write heads into the platters, and that's all she wrote. One of our secretaries managed to knock her tower over a few months ago. Bye Bye hard drive.
In theory, there is no difference between theory and practice.
In practice, there is.