Mac not booting normally after running '/sbin/fsck -fy' in Single user mode

HI, I tried to log in to single user mode and run the '/sbin/fsck -fy' command. This command failed. So I rebooted my Macbook pro by 'reboot' command. On bootup I hear the chime shoud and can see the Mac Symbol but never reach the login prompt. The round circle keeps rotating over the gray screen and nothing happens.
Then I again hard rebooted mac book and entered single user mode. I ran again '/sbin/fsck -fy' many times and after many attempts the command stuck and never returned.
Then I tried using the recovery method to reinstall MAC OS X. It asked me to choose the Harddrive where to install MAC OSX. But the option of "macintosh HD" was disabled and message was " hard drive locked".
Please help me how to boot my MAC normally :'(

Welcome to the Apple Support Communities
Boot in Recovery again and open Disk Utility. Then, choose "Macintosh HD" in the sidebar and repair the hard drive. If it is repaired, restart and OS X should start correctly. If not, you will probably have to format the hard disk.
You only have to use that command when you have problems with the Mac OS X volume filesystem that they couldn't be repaired with Disk Utility, and as this command got stuck, probably damaged the OS X volume filesystem

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