pjkva

I am new to imgBurn (and forums) What types of DVDs does imgBurn read/backup? I started backing up several types of DVDs, movies, PS2 games - but when I tried a PS3 game it does not read the DVD,it just says "Device not ready (Logical unit not ready, Cause not reportable)? I have looked at FAG and guides but do not see anything Thanks (I appoligize if I am in the wrong area)