Hi all, I'm getting this weird clicking noise from my hard drive when my MBP is sitting idle. It sounds like it's a series of 3 or 4 clicks going from a high pitch to a low pitch, and then it pauses for about 20 seconds before it does it again. I just purchased my MBP (Penryn, 200GB 7200 rpm HDD, arrived March 10) and today's the first time I noticed this. I've rebooted, ran disk utility which said the HDD is fine, and I've searched all over for an answer. The only thing I came up with is that it usually signifies an imminent hard disk failure. I'm a first time Mac owner so I'm at a loss of what to do. Has anybody else had this issue and is there a fix for it? Should I be worrying or calling Apple Care? Thanks in advance.