Abstract: A method includes generating a layer three trap packet that includes an indicator that indicates an audit request of a resident configuration file, transmitting the layer three trap packet to another device, receiving a reference configuration file in response to transmitting the layer three trap packet, comparing the resident configuration file with the reference configuration file, and replacing the resident configuration with the reference configuration file when a difference between the reference configuration file and the resident configuration file exists.

Abstract: This storage system includes a first storage sub system having a first logical volume where a first data area is dynamically allocated to each prescribed area, and which stores data transmitted from a host computer in the first data area, and a second storage sub system having a second data area for backing up the first logical volume; wherein the first storage sub system includes: a first management unit for managing the status of the first data area allocated to each of the areas of the first logical volume; a transfer unit for transferring the data stored in the first data area allocated to each of the areas of the first logical volume to the second storage sub system; and a restoration unit for restoring the first logical volume based on the status of the first data area managed by the first management unit and/or the data transferred from the second storage sub system.