Method for controlling storage system, and storage control apparatus
First Claim
1. A first apparatus adapted to be coupled to a plurality of apparatuses, at least one of said plurality of apparatuses including a plurality of storage devices and a data read/write control unit executing data read/write processes to said plurality of storage devices based on a Redundant Array of Independent Disks (RAID) scheme, said first apparatus comprising:
- a control unit transmitting a request corresponding to a data write request or a data read request received from a computer with reference to mapping information between a first identification, designated by said data write request or said data read request received from said computer, and a second identification of an object from/to which a second apparatus of said plurality of apparatuses executes data read/write processes;
wherein said control unit of said first apparatus receives a predetermined copy command related to said first identification and executes a copy process from said second apparatus to a third apparatus of said plurality of apparatuses, the second apparatus being unable to execute said predetermined copy command.
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Accused Products
Abstract
A method for controlling a storage system including a host computer, and a first and a second storage control apparatuses each receiving a data input/output request from the host computer and executing a data input/output process for a storage device in response to the request, comprises connecting a first communication path between the host computer and the first apparatus; connecting a second communication path between the first apparatus and the second apparatus; receiving by the first apparatus a first data input/output request from the host computer through the first path; when the first apparatus has judged that the first request is not for the first apparatus, transmitting by the first apparatus a second data input/output request corresponding to the first request, to the second apparatus through the second path; and by the second apparatus, receiving the second request and executing a data input/output process corresponding to the second request received.
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Citations
21 Claims
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1. A first apparatus adapted to be coupled to a plurality of apparatuses, at least one of said plurality of apparatuses including a plurality of storage devices and a data read/write control unit executing data read/write processes to said plurality of storage devices based on a Redundant Array of Independent Disks (RAID) scheme, said first apparatus comprising:
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a control unit transmitting a request corresponding to a data write request or a data read request received from a computer with reference to mapping information between a first identification, designated by said data write request or said data read request received from said computer, and a second identification of an object from/to which a second apparatus of said plurality of apparatuses executes data read/write processes; wherein said control unit of said first apparatus receives a predetermined copy command related to said first identification and executes a copy process from said second apparatus to a third apparatus of said plurality of apparatuses, the second apparatus being unable to execute said predetermined copy command. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control unit of a first apparatus adapted to be coupled to a plurality of apparatuses, at least one of said plurality of apparatuses including a plurality of storage devices and a data read/write control unit executing data read/write processes to said plurality of storage devices based on a Redundant Array of Independent Disks (RAID) scheme,
wherein said control unit of said first apparatus transmits a request corresponding to a data write request or a data read request received from a host computer with reference to a mapping information between a first identification, designated by said data write request or said data read request received from said computer, and a second identification of an object from/to which a second apparatus of said plurality of apparatuses executes data read/write processes, and wherein said control unit of said first apparatus receives a predetermined copy command related to said first identification and executes a copy process from said second apparatus to a third apparatus of said plurality of apparatuses, the second apparatus being unable to execute said predetermined copy command.
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15. A control method of a first apparatus adapted to be coupled to a plurality of apparatuses, at least one of said plurality of apparatuses including a plurality of storage devices and a data read/write control unit executing data read/write processes to said plurality of storage devices based on a Redundant Array of Independent Disks (RAID) scheme, said control method comprising the steps of:
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transmitting a request corresponding to a data write request or a data read request received from a computer with reference to a mapping information between a first identification, designated by said data write request or said data read request received from said computer, and a second identification of an object from/to which a second apparatus of said plurality of executes data read/write processes, receiving a predetermined copy command related to said first identification, and executing a copy process from said second apparatus to a third apparatus of said plurality of apparatuses, the second apparatus being unable to execute said predetermined copy command. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification