Disk Unreadable Error

So I was wanting to play Mass Effect 3 to get ready for the upcoming DLC, but when I put the disk in to the 360 and start up I get a disk read error. The disk is in pristine condition, not a scratch or smudge on it. I've tried clearing the system cache and redownloading all DLC content, but still get the same error. All other games work fine so it's just Mass Effect 3. Also, I downloaded ME3 to the hard drive for both disks and the error still appeared even though the download worked fine. How do I fix this so I can play ME3