Disc compatibility lang 'yan.
Trial and error talaga 'yan. Sa umpisa, you really have to burn, test and throw away.
Check Media I.D. using Nero's "Disc Info" button at Nero's "CD-DVD Speed" test or Nero's "Info Tool". In my experience, high compatibility ang mga DVD-R by CMC.
Recommended burn speeds:
4x for DVD;
24x for CD.