When I swapped my 2011 MBP's original HDD with a Seagate Momentus XT, I forgot to carry over the 4 nibble things that fully secure the drive inside the chassis. I had updated the XT's firmware, installed OS X, upgraded to 10.6.7, and installed Logic Studio before realizing the oversight. During this time, the laptop was sturdily perched and wasn't moved, but a net amount of 70GB was written to the drive during this time. After putting in the nibbles and powering back up, I felt no difference in the vibration I would expect to find coming from a mechanical HDD. With the drive hanging half-loose in the chassis, should I be worrying about problems down the road, such as premature drive failure?