I have the newest model Mac mini and recently upgraded to Mountain Lion. The Mac is about 9 months old and I have noticed that I hear the drive writing a lot more than I ever noticed before. I did a disk verify and it said "Mac HD is Ok". I talked to apple support and they were cool, even tho my hardware phone support was up, they just did it as software support for my recent OS purchase. Any one else notice a drive start to make more noise? I really hope it's not the drive failing because replacing it is a pain in the ass and the closest apple store is about 2 hours away.