I have a Mac book pro, it randomly booted up this morning with a file and a question mark. I popped in the install disk and got to disk utility, but the hard drive wasn't in the left side bar. I then was just going to reinstall the software but i had no place to but it when it asked me where to place it. So I took my back up and backed it up to another external drive. Now it will run off of that but my mac hd still wont show anywhere! dose this mean it is totally screwed? if so can I get any info that was on it, because my back up is from about a month ago.