I have a IBM 2194-302 and a HP CDRW 9100 installed and the regular cd -rom that came with the system and running windows XP. The issue seems to be both cd-roms not showing up as installed when you get into windows and also when I push the power button on one of the cd roms they do not seem to open.
I have checked the IDE cabled and reconnected them several times and some times this works and some times not. I have checked with HP on the 9100 and says disable the DMA on the cd writter.