a block diagram showing 2 sun fire 6800 systems, each with 2 partitions, a nd b. in the first system, each partition has 1 domain. partition a has active domain connections to boards 0,1,2 and 3. partition b has active domain connections to boards 4 and 5. both partitions a and b have inactive logical connections to the other partitions boards, partition a has inactive logical connections to boards 4 and 5. the second diagram is similar to the first but partition a has 2 domains.