My partition turned unmounted partition during restore process in Mac Disk Utility

Problem faced :

I got a grey screen with loading bar under the apple log and after few seconds my laptop will turn off.

Solution Tried :

1. During system start, Pressed Cmd + Control + P + R...

2. Selected "Disk utility" in OS X Utilities Window

3. Selected my partition >> Restore tab >> Select my External hard dish as Destination and clicked Restore button

4. After restore is done both my Hard disk and my mac partition turned disabled and Unmounted parttion

Problem faced now ; Unable to access the data in hard disk

Solution requested.....