So I got a used 2010 mac mini, the guy said the dvd drive didn't work. Took it home and installed an SSD, installed mountain lion and discovered that the DVD drive did seem to work. He said it was just ejecting discs instead of reading them. I put in a dvd movie and it seemed to play it alright. Then I tried to use a windows 7 iso to burn a windows 7 disc, it recognized the blank disc, begins the burn and then after a few seconds of burning it finishes and ejects the disc and gives an error about the medium. I have used these same dvds in my imac and had no issues burning onto them. I searched for help but can't seem to find anything that works. Turning the speed down didn't help, running it as a test only completes fine (without burning anything obviously). I tried using a straw and blowing into it to try to get any dust off of the lens but that doesn't seem to have helped either. I don't really want to have to replace the superdrive and it loads and spins and reads, any ideas as to how to get it to write