Removing Linux From A HD

I installed Linux Red Hat 6.2 on a hard drive, nothing else was or is on the drive. I wanted to remove it and figured the easiest way would be fdisk. Now it’s saying that it can’t remove the partitions and I can no longer access linux on the hard drive, plus i tried to reinstall and it says error accessing the partition. I’ve also tried to use partition magic 5, but it couldn’t. Is my drive ruined or is there a solution? Please help, I’m a beginner at linux so don’t be to harsh.

Thanks