Hard Drive Goes To Sleep - Always

The hard drive in my Mac Pro spins down every few minutes. I am constantly interrupted when working on it to wait for the hard drive to spin up. I do mean constantly.

This is not an Energy Saver control panel setting. Everything is set to never sleep, no how, no way. Still the HD sleeps every few minutes.

Is there a way in the Terminal to reset the hard drive's setting directly or some utility to set the drive to never spin down? Or even to have it only spin down when the control panel calls for it to spin down?

Thanks