Since I got my Macbook Pro, the hard drive has always made this thud clicking sound. I use smartreporter, but it says that everything is fine. I disagree, so maybe you can listen the the two audio clips and tell me. It happens every minute or so, but only on some days. Sometimes it never makes a sound. http://stewartblood.org/hd1.mov http://stewartblood.org/hd2.mov Thanks... [edit:] I am trying to think of a time when it seems like it is happening the most...a pattern of sorts. Maybe my imagination, but it does seem to happen more often when it is on battery, and it is getting low. Around every 15 to 30 seconds or so.