So I need to burn some DVD's from my 2010MBP and they are around 8.4GB's so they are going onto DL DVD9's. I bought Memorex DVD+R 8x media for this purpose. I have the 2010 i7 15inch MBP with this DVD drive installed: MATSHITA DVD-R UJ-898: Firmware Revision: HC09 Interconnect: ATAPI Burn Support: Yes (Apple Shipping Drive) Cache: 1024 KB Reads DVD: Yes CD-Write: -R, -RW DVD-Write: -R, -R DL, -RW, +R, +R DL, +RW Write Strategies: CD-TAO, CD-SAO, DVD-DAO Media: To show the available burn speeds, insert a disc and choose View I tried burning twice on OSX Lion with Toast Titanium 11 and both times failed at 50%, and gave an error message of something along the lines of: Focus Error, failed to switch layers, 09 01. Then I tried on Windows 7 Pro in Bootcamp with Imgburn and got the error shown in this photo. (I didn't know how to take a screenshot in windows) http://imgur.com/lxz6z Both times the drive failed to switch between the layers. And I'm pretty sure this is some kind of hardware or maybe firmware problem. If anyone knows how to solve this your help would be greatly appreciated. If not I guess I'm going to have to take it to a genius bar and see if they can do anything for me.