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After manually restarting freeze machine due to no response. It stuck on blue screen and gives error as sleeping forever. Default partitioned with LVM.

Whether I need to install fresh OS or I can get installed OS back?

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You should consider updating your system as Fedora 12 is not supported since 2010 – Ulrich Dangel Aug 3 '12 at 13:11
I will update system after it works. So what is solution to get work current system? – PrashantB Aug 3 '12 at 13:25
Read the documentation but the official way is as far as i know to do a new installation. – Ulrich Dangel Aug 3 '12 at 13:27
The "sleeping forever" error means your kernel can't find the disks to continue booting. There are a lot of reasons why this might happen, but as others have mentioned, Fedora 12 isn't even supported anymore. You might be better off getting a LiveCD of the latest Fedora, and boot from it, and grab whatever data you want to back up and install an updated Fedora. – jsbillings Aug 3 '12 at 13:55
up vote 2 down vote accepted

Booted up the system from Ubuntu live media. Install the LVM package which read the LVM partition on disk.

Run the fsck command on / patition of HDD by root user.

This will take time to complete and fixes the missing entries. Also this superblock error in fedora.

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