Yeah, you've explained it plainly enough. This is a pretty common problem.
Your optical stuff is accessed through chips on the motherboard. Those chips sit on the motherboard doing nothing until certain software programs called drivers are loaded. If the drivers get corrupted the chips once again sit on the motherboard doing nothing. The optical stuff can also sit there doing nothing if the cable comes loose from the motherboard.
So the second question, regarding whether they can be seen in the CMOS scan, is an attempt to see whether they are seen by the BIOS, which does not use the aforementioned drivers.
You could also download a 98SE boot disk from
and boot with it to see if they are visible using the DOS based drivers and prove that the hardware is good.
Assuming that the hardware is good, a probable 95% bet, based on experience, you would then look into the device mangler for IDE problems.
Ed Fair
Give the wrong symptoms, get the wrong solutions.