How to reinstall cdrom driver

I am using RedHat 7.2 and have had problems mounting a cdrom drive. I had read to remove the cdrom file and the hdc file under the /dev/ folder. Now I need it back but how do I reinstall it without having to reinstall Linux?

as root:

mknod /dev/hdc c 22 0

then,

ls -l /dev/hdc /dev/cdrom


that should do it.

If you want more info, read the man page for mknod.