I recently dropped my Macbook and now it wont startup it can't get past the white startup screen. I tried starting the computer in safe mode, i got a black screen that gave me a sort of "command prompt" interface. the computer cycled through its boot order until it read errors "disk0s2: I/0 error. invalid node structure" and it would repeat this read out indefinitely. from what i understand my hard drive is damaged and should be replaced, is there any way for me to recover files from the damaged harddrive before i replace it??