it's happen like this case >http://www.youtube.com/watch?v=YSxkSVaFE1w
i did clean install OS X for several time but it's same problem
i need to say sorry first my english not strong,i have refresh format but it happen again and again what wrong, i install only AutoCAD2014 Photoshop Illustrator Line VLC and Sketchup what wrong help me pls, i used to take my macbook pro to apple care about three time they don't see any problem with hardware they try to format and it's like to be fine but when they return to me it happen again and again. Please Help Me 
this is my video>>> http://www.youtube.com/watch?v=5piYyFZTi7k&list=UUG40NH90-S0IHmYQ9LmGIRA
i did clean install OS X for several time but it's same problem
i need to say sorry first my english not strong,i have refresh format but it happen again and again what wrong, i install only AutoCAD2014 Photoshop Illustrator Line VLC and Sketchup what wrong help me pls, i used to take my macbook pro to apple care about three time they don't see any problem with hardware they try to format and it's like to be fine but when they return to me it happen again and again. Please Help Me
this is my video>>> http://www.youtube.com/watch?v=5piYyFZTi7k&list=UUG40NH90-S0IHmYQ9LmGIRA