My Macbook Pro suffered some cosmetic damage (so I think) after my backpack fell off my desk with the MBP in it. There is a dent by the magsafe port and express card slot. It was in sleep mode at the time. Everything seems to work and the diagnostic via Techtool checks out. I'm concerned that I may have shortened the life span of my hard disk. If it was in sleep mode, and the heads were parked - is this still a real concern? Are there any diagnostics I can run to detect any potential issues? Also say I decide to get the cosmetic issues fixed through Apple and sometime later (but within warranty) the disk fails. Will they check and see that I had some cosmetic damage in the past and deny warranty coverage?