Hey all, I have a 2010 13'' MBP that has a 250GB hard drive, and recently I had a chance to upgrade to a 2010 15'' model. Since the previous owner planned to move his HDD out of the Mac, I would have to install my own HDD. I've nearly filled the drive to capacity, so I decided to upgrade to a bigger hard drive, and then put that in the bigger MBP. I got a 320GB laptop drive, performed a fresh install of Mavericks on it, and during the initial run with Setup Assistant I migrated everything off of the 250 to the new drive. After the setup was complete, I booted into the fresh install with my data to ensure everything was working, and it appeared that it was fine. I then shut off the machine, and disconnected the 320GB from the Mac. I opened up the 15'' MBP, removed the prior owner's HDD, and replaced it with my new 320GB HDD. What I didn't know was that the MBP was still powered on: it was simply in sleep mode with the lid closed. I hadn't thought to check to ensure that the Mac was off before I did the drive replacement. As a result, when I opened the lid on the Macbook, the machine woke up, and was still displaying his desktop and open applications. I quickly closed out of all the applications and shut the laptop off. When I rebooted, it was as I feared: the machine went straight to the OS X Utilities menu, and when I attempted to repair the drive in Disk Utility, I was warned that the drive couldn't be repaired. The drive also did not appear with the Mac partition in Disk Utility: it was just displayed as disk0s2. I've tried repairing the drive with Disk Utility, Disk Warrior, and Drive Genius, and none of them have been able to recover/repair the parition. Is it possible that when I replaced the hard drive while the MBP was still powered on, the current session somehow damaged the hard drive's partition or file table?