Computer system, storage apparatus and control method

The storage apparatus, comprising a first port, a second port, a memory and a controller, wherein

• the first port is coupled to an initiator apparatus via a relay apparatus, and the second port is coupled to the a initiator via the relay apparatus,
• the controller:
• establishes communications between the first port and the first relay apparatus,
• creates a virtual port which is a virtual port associated with the first port,
• establishes communications between the virtual port and the first relay apparatus,
• when the initiator apparatus has established communications with the virtual port, and communications between the second port and the first relay apparatus have been established,
• recognizes, based on communications with the first relay apparatus, that communications have been established between the second port and the first relay apparatus, and also that communications have been established between the first relay apparatus and the initiator,
• stores as a first pathway an association between the first port, the first relay apparatus and the initiator apparatus,
• associates the virtual port with the first port and stores this association, and
• stores as a second pathway an association between the second port, the first relay apparatus and the initiator apparatus.

A control method for a storage apparatus which has a first port, a second port, a memory and a controller,

• with the first port being coupled to an initiator apparatus via a relay apparatus, and the second port being coupled to the initiator via the relay apparatus,
• the method operating the controller
• to establish communications between the first port and the first relay apparatus,
• to create a virtual port which is a virtual port associated with the first port,
• to establish communications between the virtual port and the first relay apparatus,
• when the initiator apparatus has established communications with the virtual port, and communications between the second port and the first relay apparatus have been established,
• to recognize, based on communications with the first relay apparatus, that communications have been established between the second port and the first relay apparatus, and also that communications have been established between the first relay apparatus and the initiator,
• to store as a first pathway an association between the first port, the first relay apparatus and the initiator apparatus,
• to associate the virtual port with the first port and stores this association, and
• to store as a second pathway an association between the second port, the first relay apparatus and the initiator apparatus.