Macbook pro froze during partition. after force shut down it, a part of hard drive lost

2011 15' Macbook Pro with Mountain Lion.
I was trying to use Bootcamp to install windows. Somehow I got confused and used disk utility to partition my hard drive and get 100gb for windows (before that it was 500 gb with 260gb free). And after 10 minutes the computer froze and I could do nothing but force shut down it. Rebooted and disk utility shows that it has 160 gb free space now. I repaired disk and permissions but none of them worked.
How can I get my 100 gb back? Help pls
Thanks

Check this link and see it any info will help.
http://pondini.org/OSX/DU.html
edit: added this discussion.
https://discussions.apple.com/message/19213226#19213226

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