Hi, I was burning some files to DVD using Nero. I got a write error and upon investigation it would seem there was a problem with one of the files. However when I looked at the nero log I saw this: === Scsi-Device-Map === CdRomPeripheral : PLEXTOR DVDR PX-708A nvatabus Port 0 ID 0 DMA: Off CdRomPeripheral : TOSHIBA DVD-ROM SD-M1212 nvatabus Port 0 ID 1 DMA: Off DiskPeripheral : WDC WD740GD-00FLA0 nvatabus Port 2 ID 0 DMA: Off It suggests that DMA is off. When I checked in Device Manager(NVidia Nforce 3 cntrller) the transfer mode is set to UDMA2(not selected by bios). Indeed SiSoftSandra reports the current transfer mode for the WDC drive as UDMA6. Any ideas guys.