Hi all, I have an external 1.0 TB WD MyBook hard drive attached via Firewire 800 (the square looking cable) on my MBP (Snow Leopard) that I've had connected for the past two days. I have Time Machine set to backup every hour. Obviously it turns on when doing backups. But strangely though, the harddrive keeps turning on and off maybe every 5-10 minutes. I'm not opening Finder when this happens (which I know would spin them up), nor am I doing anything that I know of with the external HD. Any thoughts or suggestions? I'd rather not having them do this for wear and tear reasons, and the noise is kind of bothersome. Thanks.