i have problem with my drive it works only in pio mode .i removed nvidia ide ,cause i had big problems withe drive,the only thing that left me to do is to downgrade the drive in the official firmware to c if it will now enables teh udma mode,when i back up dvds the multipier can go higher than 3x OUAAAA!!
Try deleting the IDE channel in the device manager and rebooting. That will reset it to DMA.
Also, make sure that the drive isn’t jumpered in cable select mode.