The combo drive will attempt to read it, then eject it.
- I've tried cleaning the disc, restarting, resetting PRAM and NVRAM
- All other discs work perfectly
- The disc works fine on my brother's MacBook
Does anyone have any ideas? 
- I've tried cleaning the disc, restarting, resetting PRAM and NVRAM
- All other discs work perfectly
- The disc works fine on my brother's MacBook