Hey, guys. The title of this thread is:
"Computer is not recognize the sata DVD ROM".
If rfnadeem does not have a hardware problem, he has some sort of motherboard/BIOS configuration problem.
One of the basic rules of troubleshooting is to check the simple sh..., err, stuff first. Pulling the drive and testing it in another computer is simpler, if not easier (the two are not the same), than trying to sort out a configuration problem with a questionable drive.