Originally Posted by Trenton_Net
You don't understand. DVD-R and DVD+R are on totaly diffrent mediums. Sure they look physicly the same, but their reflectivity is diffrent
DVD+R reflectivity: 45-85%
DVD-R reflectivity: 45-85%

Wavelenght for playing DVD+R: 650nm
Wavelenght for playing DVD-R: 650nm

Track pitch DVD+R: 0.74µm
Track pitch DVD-R: 0.74µm

Pit lenght (min) DVD+R: 0.4µm
Pit lenght (min) DVD-R: 0.4µm

Scanning Velocity DVD+R: 3.49 m/s
Scanning Velocity DVD-R: 3.49 m/s