Scorpio Black WITH Free-Fall Sensor makes beeps
Yes, i'm getting the beeps, too. It started when I was in XP in Boot Camp after I woke the computer up from sleep.
Add: It always happens when I wake from sleep. A reboot will get rid of it.
I have the Scorpio Black WD3200BJKT, same as yours only with free fall detection. If I find any answers on Google I'll put it here.
Add: The WD support site had a thread on this, and a solution for PCs with a patch. But no Mac fix yet, of course.