So, my girlfriend was using my macbook lastnight and said she got the beachball of death, so she tried to reboot. However, the grey screen comes up (no logo or curser) upon bootup and does not go beyond this point. I tried safe boot (shift), reset the P-ram, and tried the boot menu with no success. Today I put the OSX disk in and ran the disk util and got an error when running disk verify or disk repair. The error is: "Invalid node structure Rebuilding Catalog B-tree The Volume OSX could not be repaired" The macbook is from September 2007, but I upgraded the hard drive a few months after that. Is the hard drive toast? Or what's the recommended next step(s)? The hard drive is a 200gb Hitachi drive that I really can't shell out the money to replace for a few weeks.