Storage system and method for managing data using the same

A storage apparatus enables efficient data restoration even if restoration is attempted using several different restoration points. The storage system is connected to a host apparatus, and includes a storage unit having various logical volumes formed therein and a controller configured to control I/...

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Bibliographic Details
Main Authors SANO KAZUHIDE, SUZUKI HIDENORI
Format Patent
LanguageEnglish
Published 19.01.2010
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A storage apparatus enables efficient data restoration even if restoration is attempted using several different restoration points. The storage system is connected to a host apparatus, and includes a storage unit having various logical volumes formed therein and a controller configured to control I/O processing with respect to the storage unit. The controller stores journal data for a data volume in a journal volume, and also stores snapshot data for the data volume in a snapshot volume. In accordance with a restoration request designating a restore point, the controller restores the data volume to the state it was in as of the designated restore point, by applying the snapshot data stored in the snapshot volume and subsequently applying the journal data stored in the journal volume. During that process, the controller saves the data in the data volume to which certain journal data is going to be applied, in a journal backup volume.
Bibliography:Application Number: US20060512250