Having dealt with a few dual-optical drive systems recently, I’ve noticed that pioneer drives have a common (and I believe major) fault: the cable select jumper does not work.
My usual way of configuring “other peoples” systems is to purely use the CS option.
The reason is that if/when my customer decides to get another drive, then I can easily tell them (over the phone) to put the jumper into the CS position, then attach the drive wherever they can make it fit… I don’t need to explain about master, slave, or why use one instead of the other. EG: if a drive is plugged into the end of the cable, it becomes the master, and there is no chance of it conflicting with another drive.
At worst, the drive letters will get mucked up (easily fixed by swapping the cable plugs (or drives) around.
At best, it will just plugin and go.
Now this is no longer the case with Pioneer drives, and it makes installing drives a lot more complicated for the ordinary computer user.