Weird issue with Plextor PX-880SA SATA DVD writer in Mac Pro (Early 2008) Hi, I've replaced the PATA DVD Drive in my Mac Pro (Early 2008) with a SATA Plextor PX-880SA. I'm running OSX Snow Leopard with all recent updates. Everything seems to work fine. The weird thing is that periodically and quite often the PX-880SA makes a noise. It's the same noise the drive makes when you insert a CD or DVD, most probably a seek. Is this behaviour normal? E.g. does the Mac Pro or OSX periodically perform a seek? If so, can I turn this off somehow? Many thanks in advance. Kind regards. Michel.