Hey guys, while I was working today I noticed a strange noise coming from the Mac Pro. I wasn't loud, it sounded a bit like something scrathing against something else really fast. I turned the MP to open the case, and while turning, the noise suddendly stopped. So I turned it back, and then the noise came back. Then I tilted the case slightley, then back, and then it was away for a few minutes. Then I heard it again, tilted again, and so on. I'm dojng this for over an hour now, and I stat worrying about the MP. It's definately something physical, it's not the PSU. I suspect one of my HDDs. I don't have the time to switch the HDDs now because at the moment, I need all of them. What do you think?