1. Two computers that are connected to a common switch or hub.
2. The two computers should also be connected by a Null Modem serial cable
   to provide the 'heartbeat' system an alternate means of communication.
3. Each system must independantly have sufficient disk space to provide file service.

host-a  10.0.0.10
host-b  10.0.0.20
fs-cluster 10.0.0.30