Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Akihiro Mori0
Shinichi Hiramatsu0
Date of Patent
March 1, 2011
Patent Application Number
12042698
Date Filed
March 5, 2008
Patent Primary Examiner
Patent abstract
A storage controller of the present invention is capable of providing a plurality of external volumes to a mainframe as a single virtual volume without lowering write performance. A virtual volume inside a main storage apparatus is associated with a plurality of external volumes inside an external storage apparatus. When the mainframe formats the virtual volume, a control information creation unit of the main storage apparatus creates and stores control information related to the virtual volume. Consequently, it is possible to enhance processing performance when the write size specified by the mainframe coincides with the data size set in the write destination, that is, during a so-called isometric write.
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