Thanks. Tried to cancel saying that the problem I was having was with a program reading the disk, but files were indeed being written.
Updated to newer version for drive support with new refurbished Dell with Win 7 (Dell with Vista died and used as trade-in so lost its DVD drive). Previously could make data disks with more than 43 files being written - now I can not make them again because only 43 files are written. This DVD drive is a SATA, I am not sure what the other one was. Please cancel - found files are being written.