When I try to write Audio CD from the CD-ROM drive to the DRU110A drive directly at 12X speed, I get the "Buffer Under Run" error message. (The CD-ROM data is write permitted.)
It is possible that the CD-ROM drive cannot extract digital audio data at 12x speed (2.1MB/s) or higher. The Sony DRU110A has a feature which could avoid the Buffer Under Run Error. Check to see this function enabled. Using speed test software(audio extraction test), verify the speed at which the CD-ROM drive can extract audio data.