Connecting device of storage device and computer system including the same connecting device

• US 7,392,336 B2
• Filed: 11/18/2005
• Issued: 06/24/2008
• Est. Priority Date: 12/09/2002
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Muraoka, Kenji, Mimatsu, Yasuyuki, Yamamoto, Yasutomo
• Primary Examiner(s): Rinehart; Mark H.
• Assistant Examiner(s): Spittle; Matthew D
• Application Number:
  US11/281,475
• Publication Number:
  US 20060095640A1
• Time in Patent Office: 949 Days
• Field of Search: 710311-316, 719325-326
• US Class Current: 710/315
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0664 at device level, e.g. emulation of a storage device or system
• CPC Class Codes: G06F 3/0665 at area level, e.g. provisioning of virtual or logical volumes
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]

Abstract

In an environment in which plural external storage devices having different function control interfaces are intermixed, when a function of a storage device is controlled from a computer, a common interface for controlling the function of the storage device is provided. A device that provides the common interface manages an interrelationship between a storage area recognized by a host computer and a storage area provided by the storage device and associates a storage area which becomes a target of a function control instruction with the storage device that provides the storage area. A type of the storage device that provides the storage area which becomes the target of the function control instruction is identified and function control is ordered through a function control interface unique to the device.

Claims

1. A switch device comprising:

a host network interface to be coupled to host computers via a network;

a storage network interface to be coupled to a first storage system which controls based on a first protocol and which has a first data volume storing data from a host computer and a second storage system which controls based on a second protocol and which has a second data volume storing data from a host computer, said first storage system and said second storage system have different functions;

a processor coupled to the host network interface and the storage network interface; and

a memory coupled to the processor; and

a plurality of first virtual volumes corresponding to at least one of the first data volumes and the second virtual volumes are corresponding to at least one of the second data volumes, the first virtual volume and the second virtual volume to be provided for at least one of the host computers,

wherein when a virtual volume specified by the a virtual volume identifier in the instruction is the first virtual volume corresponding to the first data volume, the processor sends to the first storage system, through the storage network interface, a first control information related to the first data volume according to the first protocol for the first storage system for controlling a function of the first storage system, and

wherein when a virtual volume specified by the virtual volume identifier in the instruction is the second virtual volume corresponding to the second data volume, the processor sends to the second storage system, through the storage network interface, second control information related to the second data volume according to the second protocol for the second storage system for controlling a function of the second storage system,

wherein the control information is sent by an Application Program Interface (API), and

wherein the memory holds information indicating a relationship between device type of said first and second storage systems and an API for control of a function which is able to be executed by either the first storage system or the second storage system.