OK, first try pulling the drive out hot. I've simulated plenty of errors on these before and that will let it know that something is wrong with Drive 3.
Once it starts complaining, silence the alarm and then plug it back in, also hot. The LCD sometimes takes what feels like a very long time, (watched pot and all that) to give you the 'press function to rebuild' message. You'll know it is correct when the light goes from solid red to more orange, and flashes. If it does'nt pick it up within 60 seconds, pull it out and reseat it.
At that point you can do the function button OR go into the web ui and it should look like the attached picture.
If you hit 'rebuild array' it will give you a really scary message, but it only means that it is going to wipe the disk you put in, not the whole array!
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