The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2016
Filed:
Feb. 19, 2014
Hitachi, Ltd., Tokyo, JP;
Daisuke Tanaka, Tokyo, JP;
Keishi Tamura, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
The present invention provides a storage system capable of performing data migration without stopping the IO access from a host computer, without having to copy data in an external connection storage subsystem to a migration destination storage subsystem. A configuration information of a migration source volume in a migration source storage subsystem is migrated to the migration destination storage subsystem, and during migration, cache memories of the respective subsystems are used to duplicate and store write data from the host computer, and the migration destination storage subsystem reflects the write data to the external connection storage subsystem. Reading of data is also performed by the migration destination storage subsystem.