Hi all, I'm trying to reformat my MBP and I think I'm having a little trouble. This is the first time I've reformatted a mac. I put the OS X disk in, went into disk utility and did the erase. I then restarted, again booting on the disc and I've seen nothing but a white screen for the past 2 1/2 hours. The optical drive is making noises like it is reading, but I'm not sure if it can't read from the disk or it is actually formatting. Any ideas?