I have a ROM 3 IIgs with an A9M0107 drive and a brand new CFFA3000. I noticed today that the drive is no longer working. This is the first time that I tried to use it since I got the CFFA, and the drive always worked in the past.
I found another guy on AtariAge with a bad A9M0107, and he just got a CFFA3000 too. His symptoms sound exactly like mine.
I don't really have any clues or ideas as to what could be wrong here, but I thought you should know there might be a problem.