Why all the fuss?
I am using 2 hdd on ide1
2hdd on ide 2
cdburner master, cdrom slave ide 3
dvd master, cdrom slave ide 4
burns fine, plays dvd's fine.
Reasoning. I keep the hdds all together to keep the ata100 rate up. I (think) that whatever is the lowest tranfer rated device on a channel will limit both devices to that rate. The drawback is that the (scsi) raid controller will not operate anything but hdds until the drivers are loaded (because the hdd's are detected and then some magic happens and they boot). My solution to this was to (as always) copy the cabs and setup files from the OS disc to the hdd after a format. I also have the promise ultra family drivers from the soyo cd on my hdds. I copy that to the formatted drive as well. Since windows is a real work of art, I always unplug the power from my other hdds when installing an os. I never have had to change jumpers on the dragon+ to reroute the master/slave scenario, it does not care if there are no other hdds detected. So I put the OS on and then (when the board jumper is set correctly and bios raid is enabled) in the device manager go to the unknown device "MASS STORAGE ADAPTER" and install drivers from the promise ultra family drivers folder. It reboots with the raid controller listed as a SCSI device.
During bootup, my 4 hdds are detected in standard cmos setup. Then the raid controller starts looking for devices. Upon finding my optical drives, it lists them and states that it found no hdd's so it is moving on. When the OS is up, the raid drivers see the optical drives and all is keen again. I would suggest for a 4 hdd system and one cdrom that you put the cdrom on ide2. Of course your two primary drives (each with an OS) should go on ide1. Any other hdd's could go on ide 3 or 4. The reason for this is so that you have access to that cdrom at dos-prompt. I am seriously thinking about moving one of my hdds to ide3 or 4 so I can get a cdrom onto 1 or 2.
The really neat thing about this board is when you hit the ESC key after device detection. It allows you to boot from any device on ide 1 or 2. So by putting all 4 of my hdds on 1 and 2ide, I have up to 4 OS's to choose to boot from. Currently I can boot to 98se, me, xp pro, or win2000. That my friends is why I bought this board. It also gives me lots of optical drive options while retaining my OS options.
Like I said, I have had no problems with ide 3 and 4 and optical drives as long as a I keep the dvd and burner on seperate channels and make them the masters on thier respective channels.
Hope it helped.