An entertainment system comprising a base unit with a transceiver for interacting, at times, with a control unit via a communications link, and a control unit for controlling the base unit, the control unit being dockable with the base unit to establish direct electrical connection between them, and including a transceiver for interacting with the control unit via said link when undocked. It is difficult to manage data storage and replication operations occurring across such multi-LUNs. The first load transistor and the driver transistor, in series, form an inverter at the supply voltage terminals.