Hey all, my mac book pro, 2009, froze on saturday. Shut it down restarted and had a flashing folder icon with a question mark. Put in snow leopard install disk and it booted but did not see a drive. Went to local mac service center and explained the problem. They felt as I did the hard drive was toast. Bought new western digital hard drive and took it home. Installed and put install disk in, still does not see anything in disk utility. Tried to look up disk in terminal and nothing. What could be wrong?? Thanks in advance, i have been searching the net for the last few hours and everything says to reformat, and I can not do that is it is not seeing the new drive. I have checked to make sure it is plugged in multiple times.