I have a SCSI HDD (Seagage) and an IDE HDD in the same computer. The IDE drive basically stores MP3's and other files. Anyway, the IDE drive occasionally "spins up" and makes a high pitch sound. Sometimes when my system is idle for a period of time and I clear the items out of my Recycle Bin there is a momentary pause and then I hear the high pitched whine of the IDE drive before I can clear the contents. I'm running XP Pro. Is there a setting I can check or uncheck to fix this?