US 2004/0107325 A1Published application

Storage system, storage system control method, and storage medium having program recorded thereon

AssigneeHitachi, Ltd.

InventorAkihiro Mori

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Abstract

A storage system has a host computer and a storage control device connected thereto. The system controls duplication of data in a first logical volume to be stored in real-time in a second logical volume different therefrom, and makes a logical volume identifier and a data set identifier for the first volume described in the first volume's management information and a logical volume identifier and a data set identifier for the second volume described in the second volume's management information match during the duplication. The system generates a control program for setting the first volume's logical volume identifier and data set identifier in the first volume's management information and the second volume's logical volume identifier and data set identifier in the second volume's management information to differ and, by executing this program, makes the second volume be recognized by an OS as a volume independent of the first volume.

Claims10

Dependent claims

A method of controlling a storage system,

said storage system including a host computer, and a storage control device that is connected to said host computer to be able to communicate therewith and that is for inputting/outputting data to/from a storage device based on a data input/output request sent from said host computer;
said storage control device performing:
a first control for managing a storage area in said storage device using a logical volume that is a logical storage area created on said storage area and storing, in said logical volume, management information that enables an operating system running on said host computer to manage said logical volume;
a second control for controlling duplication of data in a first logical volume also to be stored on a real-time basis in a second logical volume that is different from said first logical volume;
and a third control for making a logical volume identifier and a data set identifier for said first logical volume that are described in the management information in said first logical volume and a logical volume identifier and a data set identifier for said second logical volume that are described in the management information in said second logical volume match each other while said real-time duplication is being performed;
said method comprising:
said storage system generating a control program for performing a process for setting said logical volume identifier and said data set identifier for said first logical volume, which are described in said management information in said first logical volume, and said logical volume identifier and said data set identifier for said second logical volume, which are described in said management information in said second logical volume, to be different from each other;
and
said storage system interrupting said duplication and then executing said control program.

6 more elements

A storage system comprising:

a host computer;
and
a storage control device that is connected to said host computer to be able to communicate therewith and that is for inputting/outputting data to/from a storage device based on a data input/output request sent from said host computer, wherein
said storage system:
managing a storage area provided by said storage device using a logical volume that is a logical storage area created on. said storage area;
storing, in said logical volume, management information that enables an operating system running on said host computer to manage said logical volume;
controlling duplication of data in a first logical volume also to be stored on a real-time basis in a second logical volume that is different from said first logical volume;
and
making a logical volume identifier and a data set identifier for said first logical volume that are described in the management information in said first logical volume and a logical volume identifier and a data set identifier for said second logical volume that are described in the management information in said second logical volume match each other while said real-time duplication is being performed;
said storage system further comprising:
means for generating a control program for performing a process for setting said logical volume identifier and said data set identifier for said first logical volume, which are described in said management information in said first logical volume, and said logical volume identifier and said data set identifier for said second logical volume, which are described in said management information in said second logical volume, to be different from each other;
and
means for executing said control program after interrupting said real-time duplication to make said second logical volume be recognized as being accessible by said operating system either as a logical volume independent of said first logical volume or as a data set independent of a data set within said primary logical volume.

10 more elements

A computer-readable storage medium having a program to be executed by a storage system recorded thereon,

said storage system including:
a host computer;
and a storage control device that is connected to said host computer to be able to communicate therewith and that is for inputting/outputting data to/from a storage device based on a data input/output request sent from said host computer, and
said storage system:
managing a storage area provided by said storage device using a logical volume that is a logical storage area created on said storage area;
storing, in said logical volume, management information that enables an operating system running on said host computer to manage said logical volume;
controlling duplication of data in a first logical volume also to be stored on a real-time basis in a second logical volume that is different from said first logical volume;
and making a logical volume identifier and a data set identifier for said first logical volume that are described in the management information in said first logical volume and a logical volume identifier and a data set identifier for said second logical volume that are described in the management information in said second logical volume match each other while said real-time duplication is being performed;
said program making said storage system realize the functions of:
generating a control program for performing a process for setting said logical volume identifier and said data set identifier for said first logical volume, which are described in said management information in said first logical volume, and said logical volume identifier and said data set identifier for said second logical volume, which are described in said management information in said second logical volume, to be different from each other;
and
executing said control program after interrupting said duplication to make said second logical volume be recognized as being accessible by said operating system as a logical volume independent of said first logical volume.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/643,624Filed 18 Aug 2003
Priority: JP 2002-30078915 Oct 2002
Published: 3 Jun 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G06F 3/065
Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems: replication mechanisms
G06F 3/0605
Improving or facilitating administration, e.g. storage management: by facilitating the interaction with a user or administrator
G06F 3/0689
Plurality of storage devices: disk arrays, e.g. RAID, JBOD
Y10S 707/99953
Coherency, e.g. same view to multiple users: recoverability