I just purchased a new LG DVD/CDRW ( GCC-4520B) and a western Digitial 60 gig drive. The system board supports up to ULtra dma 33 and both drives are detected and utilize this mode of dma from the bios. The hard drive works great i just mention it cause it seems relevent.
I can read and explore the dvd drive, and the harddrive works no problem however when i try and play a DVD or Burn anything the HDD light comes on and the system stalls indefinatlly. I have go into the Controller in device manager and change the DVD to “Pio only” after the reboot to be able to use the drive, obviously this makes dvd playing very choppy burning could be slower but at least it works.
Does anyone have any suggestion for what else i can try to get the drive to operate properly in Ultra dma mode, the weird thing is that when i start the computer the drive will read the disk and i can even explore its contents but once i launch either nero or powerdvd and try any signifigant use of the drive everything fails.