i see two problems here... first is you want to reformat the system partition and the second one is an allegedly faulty dvd drive. for the drive, you can test this on another computer via a USB connected enclosure.
for the reformatting of the system partition, you can still do this without the drive. the process will delete your existing system including all your data and will reinstall the operating system and pre-loaded software. this will bring back default or factory settings. if you want to do this, try the steps here:
Laptop Recovery Instructions