Sun was founded with one driving vision. A vision of computers that talk to each other no matter who built them. A vision in which technology works for you, not the other way around. While others protected proprietary, stand-alone architectures, Sun focused on taking companies into the network age, providing systems and software with the scalability and reliability needed to drive the electronic marketplace.This redundancy kit for Sun Fire 3800 server includes 1 P/S (pluggable type A), 1 fan tray and 1 system controller.