US 8,266,377 B2Granted

Computer system and control method for the computer system

AssigneeHitachi, Ltd.

InventorsYuri Hiraiwa, Nobuhiro Maki, Takeyuki Imazu

Life of this patent

Estimating the term…

Loading patent…

Abstract

A computer system including a first storage system connected to a first host computer, a second storage system connected to a second host computer and a third storage system connected to the first and second storage systems. The second storage system sets transfer setting before an occurrence of a failure, the transfer setting being provided with a dedicated storage area to be used for transferring data to the third storage system by asynchronous copy in response to a failure at the first host computer. Before the start of data transfer between the second storage system and third storage system to be executed after an occurrence of the failure, the second storage system checks the dedicated storage area, data transfer line and transfer setting information, and if an abnormal state is detected, this abnormal state is reported to the host computer as information attached to the transfer setting.

Claims8

Dependent claims

A storage system comprising:

a first storage apparatus, coupled to a host computer, including first volumes;
a second storage apparatus, including second volumes corresponding to the first volumes and managing a first pair between the first volumes and the second volumes, for storing replication data of the first volumes to the second volumes by first remote copy;
and
a third storage apparatus, including third volumes corresponding to the first volumes and managing a second pair between the first volumes and the third volumes, for storing replication data of the first volumes to the third volumes by second remote copy,
wherein the second storage apparatus is configured to manage a third pair between the second volumes and the third volumes,
wherein the second storage apparatus is configured to judge whether or not an amount of the second volumes and another amount of the third volumes are identical with each other when the second storage apparatus receives, from the host computer, a reservation instruction for transferring differential data showing a difference between each of data of the second and third volumes to the third volume during a remote copying operation at each of the first and the second pairs, and
wherein the second storage apparatus is further configured to determine whether it is possible to perform the second remote copy at the third pair, and also configured not to transfer the differential data until an instruction for transfer reaches the second storage apparatus.

4 more elements

A method in a storage system which includes a first storage apparatus, coupled to a host computer, including first volumes, a second storage apparatus, including second volumes corresponding to the first volumes and managing a first pair between the first volumes and the second volumes, for storing replication data of the first volumes to the second volumes by first remote copy, and a third storage apparatus, including third volumes corresponding to the first volumes and managing a second pair between the first volumes and the third volumes, for storing replication data of the first volumes to the third volumes by second remote copy, said method comprising:

managing, by the second storage apparatus, a third pair between the second volumes and the third volumes;
judging, by the second storage apparatus, whether or not an amount of the second volumes and another amount of the third volumes are identical with each other when the second storage apparatus receives, from the host computer, a reservation instruction for transferring differential data showing a difference between each of data of the second and third volumes to the third volume during a remote copying operation at each of the first and the second pairs;
and
determining, by the second storage apparatus, whether it is possible to perform the second remote copy at the third pair, and not transferring the differential data until an instruction for transfer reaches the second storage apparatus.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/334,123Filed 22 Dec 2011 · continuation
Priority: JP 2006-12154126 Apr 2006
Published: US 2012/0096232 A119 Apr 2012
Granted: 11 Sep 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G06F 11/2071
By mirroring: using a plurality of controllers
G06F 11/2058
By mirroring: using more than 2 mirrored copies
G06F 11/2069
By mirroring: management of state, configuration or failover
G06F 11/2074
Using a plurality of controllers: asynchronous techniques

Family

Application11/486,160Parent of this continuation · filed 14 Jul 2006
Application12/366,685Parent of this continuation · filed 6 Feb 2009
Application12/877,217Parent of this continuation · filed 8 Sep 2010
Application13/093,877Parent of this continuation · filed 26 Apr 2011
US 2012/0096232 A1Pre-grant publication · published 19 Apr 2012
US 8,108,606 B2Parent of this continuation
US 7,958,306 B2Parent of this continuation
US 7,809,887 B2Parent of this continuation
US 7,512,757 B2Parent of this continuation
US 2007/0254922 A1Published application
US 2009/0150630 A1Published application
US 2011/0004736 A1Published application
US 2011/0202738 A1Published application
US 8,266,377 B2This patent

From the US filing history. Foreign family members aren’t listed.