I have been noticing a high-pitched, annoying whining noice from my 17 inch iMac's Superdrive. This occurs at low speeds(I chose to burn a birn folder that has important stuff on there so I wanted it 2 be relaible by burning at low sppeds). This worrys me because mybeautiful iMac is well-beautiful. This is my first mac, love it too much for this 2 happen