Toshiba Satellite A215-S4747. 4gb. Vista Home Premium. This drive also identifies as (DVD+-RAM 530L v1). Latest firmware (5M64) Using Memorex 16x CD+R media (Memorex recommends Memorex). External usb. Comes with Nero 7 Essentials. This burner reads fine. This burner writes a data dvd fine (at least the one created by Nero's Drive Speed test). It will write a lightscribe label ok. But I cannot get this drive to burn an iso image. DVDFab 4032 exits with an error after thrashing for a bit. The progress bar never increments. Nero 7 keeps counting down from 7min50sec until it reaches 0, then starts over. The progress bar stays at 1%. Imgburn counts time but updates no other write data. Forever. Is there some sort of security feature built into this drive that keeps it from burning ISO images? DVDFab will burn an image to the internal Matshita UJ-850S at 4x just fine. I'm at a loss. I've got a stack of coasters here.