My brother has a Toshiba SD-R5112 which supports 4x burning of DVD-R. I was trying to burn some Bulkpaq Orange Princo @ 4x and even though both Nero latest and Roxio CD/DVD Creator said 4x when burning it took about 45 minutes to burn a disc in each app.
I checked DMA was enabled in device manager and whilst there noticed an oddity.
The drive is listed but above it are 3 duplicate entries of H+H DVD something or other. What the hell is that? I tried removing all ROM drives and rebooted and it detected the drive plus those 3 entries again!
It still will not burn at full speed.
It's an HP machine with branded HP XP Home edition.