I went to boot up my MBP the other day and got a flashing grey folder with question mark. I figured a corrupt directory or something made the startup files not readbale, so booted into target mode, connected the MBP to my imac and ran Disk Utility on it. When doing that, it detected an error, but gave me the message that it couldnt fix it because of an invalid key length. So, tried the same procedure with Drive Genius, and got the same message. Then again with Disk Warrior, which went through the process of rebuilding my directory, but then, when I told it to replace the new directory i get an error message stating the there was a disk malfunction. It says the rebuild the disk again, but then i get the same message. it cites error code (2351, -36). My MBP has a 128GB Crucial M4 SSD. the drive is about 3 months old. I have backups of my files, so no concerns there really but this seems like kind of an epic crash. Is this hardware related? faulty SSD? or just a weird fluke? anyone seen this before?