My MacBook Air can't find Macintosh HD in disk utility
I Restarted my Mac because I got the blue flashing folder with the question mark. However, when I select disk utility I don't see the option to erase or restore my Macintosh HD, which is not even being shown. The verify and repair disk are also greyed ou. I've included images to show what I mean. Any and all help is tremendously appreciated
MacBook Air, iOS 7.0.3