A file server for serving data of a client from a network. The server includes disk means for storing the data. The server includes means for receiving the data from the network and sending an acknowledgment that the data has been stored to the client through the network but before the data has been stored in the disk means, the receiving means in communication with the disk means. The server includes a memory for storing the data until the data is stored in the disk means, the receiving means is in communication with the memory. The server includes a first power source for provide electricity to the disk means, the memory and the receiving means, the first power source in electrical communication with the disk means, the memory and the receiving means. The server includes a second power source that provides electricity to the memory when the first power source fails, the second power source in communication with the memory. A method for serving data of a client from a network.