Hi,I have a old 6509 chassis installed with a Supervisor Engine 1A. Now, I want to upgrade the 6509 so that I will purchase WS-SUP32-GE-3B. The problem is whether I should purchase new Fan and Power to fulfil WS-SUP32-GE-3B.Can I keep old Fan and Power to WS-SUP32-GE-3B? Pls help me to confirm the issue by giving note or cisco web link. Thanks a lot.