Patent ID: 7159045
Filing Date: 2007-01-02
Classification: G06F

Abstract:
1. A first switch which is connected to a second switch to be connected to a computer and a third switch to be connected to a storage device, comprising: plural port processing sections which send and receive data; a memory which stores a program; and a processing section which executes the program; wherein the memory stores a port ID of the storage device, first information indicating whether or not the storage device has a port ID equivalent to a virtual storage corresponding to the storage device, and second information indicting attributes of virtual process associating them with each other, and wherein the program includes a section which, in the case in which an inquiry request concerning the storage device is received from the computer, judges whether or not the inquiry request is for the virtual storage using the second information, a section which, in the case in which the inquiry request is for the virtual storage, judges whether or not the port ID of the virtual storage is equivalent to the port ID of the storage device corresponding to the virtual storage using the first information, and a section which, in the case in which the port IDs are equivalent, sends an inquiry rejection to the computer.