What DVD burning SW are you using ?
VAPCMD
I have a i/o magic idvd8pb2 external dvd burner. I just purchased a 100 pack of blank dvds and when I put the blank disc in, it takes awhile to read them and it is showing that they are not blank. I put in a blank cd and that shows as being blank. Can anyone help me to figure out why it is not reading my blank dvds as blank or what I can do to fix this issue?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic