i accidentally updated my friends xbox 360 slim 250G to dashboard 2.0.16537.0 so am not able to play with burned DVD's here's some info about it :
MFR date : 2011-3-16
dashboard 2.0.16537.0
drive : DG-16D4S
FW :0225
im not sure but i think its unlocked drive or has been modded (im kind of...