yep, I tried 4 different ones, sata, ide, slot load and tray laptop DVDs as they are WAY smaller in my mods. If I put in a reg disk (program or driver disk), or even one I recorded they work fine, but if I pop in a DVD with a movie (like I get from netflix) it says no disk inside the units... I tried also upgrading the firmware as well.. The reason I was able to use a full size DVd in their place is the comp is LEGOS, I just added 3 more rows and voila... more room... It just seems a waste not to use the drives, so if its something I am doing wrong (possible)than I would like to be corrected..