What are the settings in the Energy Saver control panel? On my platinum G3 with OS 8.6, my HD will only spin down when I select a spin down time in the control panel. Otherwise, choosing "sleep" from the Special menu will only sleep the monitor. If I want the HD to spin down, I have to open up Energy Saver, check the " separate timing..." box, move the slider from "never" to "60", and close Energy Saver. What a drag!