So long story short my Friends father has this 2012 macbook Pro model identifier 9,1 and it has been beach balling, crashing freezing lagging all the time. Its running OSX lion. We had it taken to the apple store and running apple diagnostics test and found that the OS had some corruption. The technician recommended a format reload and then the backup was taken from the time machine backup. That was on monday. It worked fine for a bit and then began to beach ball freeze and refuse to save word documents asking them to be renamed. I ran a disk utility hard drive check on it and it gave me the errors in the photo. Then we ran another one today and everything appears to be fine. THis machine has applecare on it and although the technicians say the drive was fine, i fear it may be slowly on its way out. What do you think? should we go back and ask for a new drive? Thanks let me know. WE need this machine bac up and running ASAP. All help is appreciated.