Have just installed a pair of Sony DWQ28A rewriters. Previously using a pair of Artec rewriters without problem until one went wrong so decided to replace with another matching pair. Did try a Pioneer 110, but had a probelm using these Datawrite Titanium discs (CMC Mag AE1) - problems well documented elsewhere.
Anyway, despite what you may say about the media, my Artecs wrote hundreds of these without problem, and hence I have hundreds of this media left - bought a good supply at a good price! These Sony rewriters just don't like them, and I have tried all the firmware updates, and yes I know they are Liteon SOHW-1693S rebadged models - have tried that firmware update also.
The drives will write them individually, sometimes but not all the time. When I try using the two drives together, there is always an error. What used to take five minutes or so for a pair of DVDs now takes ten or twelve for one!
Am I missing something obvious here?