And no, I don't mean the start up chime... My apologies if a thread for this question exists already...I searched but couldn't find one. Anyway, my brand spanking new 1.5 PB 15" arrived today. I opted for 1GB ram and a 5400 rpm HD from Hitachi. It works flawlessly except when waking from sleep mode, it makes a funny little sound that I suspect is coming from the hard drive as it spins up. There's no way to reproduce the sound (obviously) but it sort of resembles a brief series of chirps or clicking. I am upsizing from a G3 iBook which has never made this sound. Is this common? Is it a problem? Thanks for any help.