Storage system comprising function for migrating virtual communication port added to physical communication port

A computer system, comprising:

• one or more storage systems including a plurality of logical storage devices, a plurality of physical ports, and a plurality of virtual ports,
• wherein one or more virtual ports are associated with each physical port,
• one or more logical storage devices associated with each virtual port,
• virtual port information for each virtual port, including virtual port identification information of the virtual port and physical port identification information of the physical port associated with the virtual port, wherein the virtual port identification information includes one or more information elements including a virtual port identification (ID) and a virtual port World Wide Name (WWN), and the physical port identification information includes one or more information elements;
• and
• a switch unit including one or more switch devices, the switch unit comprising:
• a plurality of switch ports coupled to:
• one or more computers that issue an access command frame having port identification information on a virtual port associated with a logical storage device;
• and
• the plurality of physical ports;
• transfer management information including a plurality of combinations of destination port identification information and transfer destination information;
• a switch controller which, in cases where a frame including destination port identification information is received by a switch port, is configured to:
• specify transfer destination information corresponding with destination port identification information;
• and
• transmit the received frame from the switch port corresponding with a transfer destination;
• and
• a switch processor configured to update the transfer management information;
• the one or more storage systems include:
• a storage processor coupled to the plurality of logical storage devices and the one or more physical ports, the storage processor configured to migrate a migration target virtual port from a migration source physical port to a migration destination physical port by changing the physical port identification information corresponding with the migration target virtual port from physical port identification information of the migration source physical port to physical port identification information of the migration destination physical port;
• and
• configured to transmit a port switching request to the switch unit, the port switching request including a port identification information element corresponding with the migration target virtual port;
• and
• in cases where the port switching request is received, the switch processor updates the transfer destination information corresponding with the port identification information element in the port switching request to information representing the transfer destination corresponding with the switch port coupled to the migration destination physical port,
• whereby the virtual port ID and the virtual port WWN of the migration target virtual port are associated with the migration destination physical port instead of the migration source physical port.

An access path switching method for switching an access path in a computer system in which one or more computers and one or more storage systems are connected to a switch unit including one or more switch devices, the method comprising the steps of:

• providing virtual port information for each virtual port, including virtual port identification information of the virtual port and physical port identification information of the physical port associated with the virtual port, wherein the virtual port identification information includes one or more information elements including a virtual port identification (ID) and a virtual port World Wide Name (WWN), and the physical port identification information includes one or more information elements;
• migrating a migration target virtual port from a migration source physical port of the storage system to a migration destination physical port of the storage system by changing the physical port identification information corresponding with the migration target virtual port from physical port identification information of the migration source physical port to physical port identification information of the migration destination physical port;
• transmitting a port switching request from the storage system to the switch unit, the port switching request including a port identification information element corresponding with the migration target virtual port;
• issuing an access command frame from one of the one or more computers, the access command frame having port identification information on the virtual port associated with a logical storage device in one of the one or more storage systems;
• in cases where a frame including destination port identification information is received by a switch port,
• specifying transfer destination information by a switch controller, the transfer destination information corresponding with the destination port identification information;
• and
• transmitting the received frame from the switch port corresponding with the transfer destination;
• updating the transfer management information by a switch processor;
• and
• in cases where the switch unit has received the port switching request, updating transfer destination information corresponding with the port identification information element in the port switching request to information representing the transfer destination corresponding with a switch port coupled to the migration destination physical port,
• whereby the virtual port ID and the virtual port WWN of the migration target virtual port are associated with the migration destination physical port instead of the migration source physical port.

A switch device to which one or more computers and one or more storage systems are connected, comprising:

• a plurality of switch ports;
• transfer management information including a plurality of combinations of destination port identification information and transfer destination information;
• a switch controller which, in cases where a frame including destination port identification information is received by a switch port, is configured to:
• specify transfer destination information corresponding with destination port identification information;
• and
• transmit the received frame from the switch port corresponding with the transfer destination;
• and
• a switch processor configured to update the transfer destination information with the destination port identification information corresponding to a migration destination physical port, whereby a virtual port ID and a virtual port World Wide Name of a migration target virtual port are associated with the migration destination physical port instead of a migration source physical port,
• wherein the migration destination physical port is associated with the storage system.