Screaming HD, and I don't mean fast...

MAN, I'm having so many problems with my servers! Alright, I took out my storage HD from my old P200 server, and stuck it in my new Duron850 server. I cut it on, and I hear my primary HD spin up, the the other straining a bit. Suddenly, my room is filled with the wonderful sound of my HD screaming away. I'm not sure if somthing is rubbing in there or what, but the noise was almost unbearable! Somehow, I managed to get to windows, and the HD was working fine, other then the strange thinking noise(kinda sounded like water???) Anyway, I think the HD works, but what could cause it to suddenly become so loud?

Also, is this fixable? A bit of a dumb question I guess, but I REALLY need the HD... All I have in my new server is one 3.2G with W2K server...