Reducing heat in a multiple drive system: enable power saving

I'm not sure I know everything that went wrong with my Vantec/IDE saga, but it did make me very conscious of how darned hot my XP system is nowadays. I have 3 200 GB drives and one removeable 80GB drive in one tower case. I've added extra fans and, far more importantly, better room cooling, but there was one simple fix that didn't occur to me until recently. I used XP's power save utility to spin the drives down after 10 minutes of non-use. So far that hasn't bothered me at all and it sure drops heat output.