My teacher's early 2007 MacBook kernel panics immediately upon boot, so I decided to pull the drive and connect it via USB to my MBP. It did not mount, so I opened disk utility. I clicked on the (greyed out) Macintosh HD partition and clicked repair disk. It returned the following message to me: Verify and Repair volume “Macintosh HD” Checking file systemVolume repair complete. Updating boot support partitions for the volume as required. Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files. But I can't access the files if it won't mount, correct? If worse comes to worse, I can just tell her she's SOL and she won't be getting her data back.