Disk Utility on El Capitan failed partitioning and I have a space problem

[madmonkey111]

Hi Guys, I tried to make a 100 gb MSDOS partition with Disk Utility on OS X El Capitan, however it failed during the process, and now the 100gbs are taken. The hard drive has a 320gb capacity, and Macintosh (which is the only disk that is shown on Disk Utility) has a total of approximately 200gbs. How can I free the other hundred?

 

[Shirasaki]

Maybe you can try to do a first aid form recovery partition first.

 

[madmonkey111]

Maybe you can try to do a first aid form recovery partition first.

I have already tried to do that but nothing happened

 

[Shirasaki]

I have already tried to do that but nothing happened

Hmm. Then it might be the time to dig into diskutil to see if there is any chance. I am not good at terminal in OS X however. Sorry.