Address management device

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
• 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.

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
• 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 not equivalent, sends inquired information to the computer.

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
• 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 not 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 inquired information to the computer.

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
• 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 not 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 not equivalent, sends an inquiry rejection to the computer.

A method of connecting switch which connects a first switch to both of a second switch to be connected to a computer and a third switch to be connected to a storage device, comprising the steps of:

• sending a notification request of name information concerning the computer and the storage device to the second switch and the third switch;
• receiving the name information from the second switch and the third switch;
• preparing a virtual storage corresponding to the storage device based upon the name information;
• making a port ID of the virtual storage equivalent to a port ID of the storage device;
• and
• processing access of the computer to the storage device.

A method of connecting switch which connects a first switch to both of a second switch to be connected to a computer and a third switch to be connected to a storage device,

• wherein the first switch 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
• the method comprises steps of:
• in the case in which an inquiry request concerning the storage device is received from the computer, judging whether or not the inquiry request is for the virtual storage using the second information;
• in the case in which the inquiry request is for the virtual storage, judging 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, in the case in which the port IDs are equivalent, sending an inquiry rejection to the computer.

A method of connecting switch which connects a first switch to both of a second switch to be connected to a computer and a third switch to be connected to a storage device,

• wherein the first switch 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
• the method comprises steps of:
• in the case in which an inquiry request concerning the storage device is received from the computer, judging whether or not the inquiry request is for the virtual storage using the second information;
• in the case in which the inquiry request is for the virtual storage, judging 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, in the case in which the port IDs are not equivalent, sending inquired information to the computer.

A method of connecting switch which connects a first switch to both of a second switch to be connected to a computer and a third switch to be connected to a storage device,

• wherein the first switch 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
• the method comprises steps of:
• in the case in which an inquiry request concerning the storage device is received from the computer, judging whether or not the inquiry request is for the virtual storage using the second information;
• in the case in which the inquiry request is not for the virtual storage, judging 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, in the case in which the port IDs are equivalent, sending inquired information to the computer.

A method of connecting switch which connects a first switch to both of a second switch to be connected to a computer and a third switch to be connected to a storage device,

• wherein the first switch 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
• the method comprises steps of:
• in the case in which an inquiry request concerning the storage device is received from the computer, judging whether or not the inquiry request is for the virtual storage using the second information;
• in the case in which the inquiry request is not for the virtual storage, judging 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, in the case in which the port IDs are not equivalent, sending an inquiry rejection to the computer.