So I have an 15" mid-09 MBP 2.8GHz, upgraded 8GB ram, and just recently decided to upgrade to the Momentous XT. I backed up (time machine) my old HD. Removed it and put in the new drive. Updated the firmware on the XT, rebooted while holding the tracpad down, and inserted the SL install disk. As soon as that was up and running, I upgraded to Lion via the Appstore. I then restored from my time machine. Everything was easy and ran flawlessly. So it was no surprise to me when I noticed that my fans (there are two) run relatively slow, but it sounds as if one is moving faster than the other. I never noticed it being so "noisy" before. To give some reference, my laptop sounds EXACTLY like a light saber from star wars, when I move it. I am sure it does not help that I am sometimes dancing like a fool as if my Mac was some type of saber. I am sure my wife would send you pics for the right price. At any rate.... I am asking if this is something normal or is there a couple lines of code that I need to put in to fix, or could I have knocked something loose during the HD swap? or... ?