I have a Plextor 12/10/32S CD-RW (SCSI) and a Seagate Cheetah X15 on an Adaptec 19160. I'm burning an audio cd, pulling wav's/mp3's from the X15. Somewhere around 40-50% of the burning process Nero drops the burn spped from 12X to 10X with a message 'Change of write speed due to media'. I am using certified plus TDK 80 min CD-R's. When writing to disk at 12X I can see that the recorder buffer keeps going down to zero leading me to believe that the X15 is not getting data to the Plextor fast enough. Has anyone seen a problem like this or do you have any info on how I can diagnose any SCSI bandwidth problems?