I have a mid 2009 MBP 15" 2.66GHz intel core i7 processor. I was having some trouble opening software update and was told to fix my permissions and to verify my disc so i did that. while The disc was verifying it stopped and said the volume macintosh hd was found corrupt and needs to be repaired. Repair disk is grayed out. I do not have the original copy of my os x but i did make a back up copy incase i lost my original. So i put that in to see if i could repair that way it dose its thing but when my mbp restarts to finish i get the gray screen with apple logo and nothing happens. Things i have done i was told to press shift control p and r did that its dose its thing and when i go to try again i get the same screen. I have started my computer with shift option control and power button. no luck. I also did the smc thing if that is what its called with no luck. also when this started i was running 10.6.7 when i first tried repair with my back up copy of os x it changed to 10.6.8 so i feel like i did something right. But i still get the volume corrupt deal. I have no money to take it to apple store or mac doctor. So if there is a solution to my problem that i can do that would be awesome.