I have a pair of Lite On SOHW 1673S burners. I normally use only the master unit to burn CDs and DVDs with Nero. Every once in a while the burn buffer indicator in Nero begins cycling wildly from the high 90%s down to low single digit %s. This is associated with the Device Manager setting "IDE ATA/ATAPI Controlers\Primary Channel/Advanced Settings\Device 0\ULTRA DMA 4" transfer mode being changed to PIO for some unknown reason. The usual result is a coaster from a bad burn.
As soon as the controler driver is uninstalled and the PC rebooted the Ultra DMA 4 setting is restored, the buffer stays in the high 90%s and the burns are good again.
So, my question:
What keeps changing the transfer mode from Ultra DMA4 to PIO?
I haven't a clue as to why it happens. There doesn't seem to be any pattern to it. The only sign that there is a problem is after a burn has begun and the buffer indicator begind cycling meaning that a new coaster is being made.
Thx for any advice on this.