About a week ago I noticed my MBPs hard drive is remarkably loud. When I got the MBP it was not noticeable; it was just....quiet. I recorded the noise with the internal microphone of my MBP. -> -> Play audio file Just turn up the volume of your MBP to the fourth highest setting (three empty rectangles) and you can hear what I am hearing. The OS has already been re-installed a few times. The Disk Utility says, that the drive does function properly. Is this noise of any concern? What can I do about it?