I've run into an odd problem. My computer froze so I did a hard reset and on reboot I got the dreaded question mark icon. I went into disk utility and the drive was still visible so I figured the internal drive adapter wasn't dead. Anyways, I opened up the machine and took the drive out assuming it was dead. Just as a last resort I plugged the drive into an external drive adapter and it booted right into the OS no problem and I'm using it right now. Anyone have any idea what's going on? I'm currently backing up my last files. I can try and put it back inside the macbook and do a fresh install if necessary.