DVD drive will read/play some dics,but not others in Self Help Tech Support Posted December 26, 2009 I have a Sony DVD-ROM DDU1615 drive in my pc that will play/recognize some disc but not others. It will play some movies,but not others,the same with games. Arma Combat Operations (Atari copy) it'll recognize and install,but I've been unable to get it to successfully recognize/read and install Arma II (Idea games copy). I've noticed after ejecting a new/unused disk,that it has scratches.........hmmmm.....thats not good,is it. PC has a few years on it,but meets min. requirements for Arma II..........I'm stumped. Ran dianogstic test on said drive......same story as above...........didnt recognize Arma II at all,but passed test after Arma Combat Operations was put into bay. Any ideas,suggestions,advice and help will be appreciated .