partition of harddisk lost/unusable

I'm using OS X Yosemite - version 10.10.2. I have 1.12 TB fusion drive on my system. Recently I wanted to make a partition on my system, while making the partition on the system using disk utility some error occurred and partition was not created successfully.

The unusable partition of the disk.

The partition is not available here either.

So, here I'm not able to access the free space partition of my disk. The disk utility is not working with the free space partition. I want to resize the partition and want to have only single partition disk