1. A file interface arrangement for providing remote file access to a data processing system via a network, the data processing system including a system input/output bus, the file interface arrangement comprising: a bus-interface circuit arranged to interface with the system input/output bus; a processor arrangement coupled to the bus-interface circuit; a memory coupled to the processor arrangement, the memory configured with program code that is executable by the processor arrangement and that implements a standard NFS client protocol, at least one non-standard extension to the NFS client protocol, and a network protocol stack; and a network-interface circuit arrangement coupled to the processor arrangement 11 and arranged to send data received from the processor over the network and receive data via the network.