Hey there, SasiExpLosioN.
Unfortunately there's not much you can do with DVD-Roms in terms of troubleshooting. You can try it out with different cables or a different computer, to see if the issue still persists. You could try writing a few disks to see how it performs as well.
Basically if turns out that it's not working properly, you can only get a new one or replace this one if it's still under warranty.
Hope that helps.
Boogieman_WD