A server computer system includes a set of visual indicators for representing status of one or more data storage devices that are connected to one or more nodes of the server system. Control circuitry has at least first and second bus interfaces and is configured to set the state of the visual indicators responsive to signals received through the bus interfaces, and to operate in at least first and second configurable modes. In the first mode, both of the first and the second bus interfaces communicate with a single node. In the second mode, the first bus interface communicates with a first node and the second bus interface communicates with a second node.