my. dvd burner only seems to work with sony dvd-r's. I have tried many other brands ,but everytime I try to burn something on to one of the non sony brands it only wants to burn at max and then I get invalid media. My Dvd burner is a lite-on dvd burner. I did not used to have this problem before. I has only started this recently. Also it has no problem burning cd-r at all.