Check out the website: theverylastpageoftheinternet.com, From the main menu scroll down to see the devices of Jerry Smith. you will find a steel washer suspended in a permenant magnet field at room temp. If you watch the movie there are some interesting magnetic devices.
One of things we use for graphics design speedup is four hard drives on one controller card. It allows much faster r/w times. I don't know for sure if this mirroring trick will work in the solidworks world.