Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masafumi Nozawa0
Naoto Matsunami0
Akira Yamamoto0
Koji Sonoda0
Masaaki Iwasaki0
Date of Patent
April 12, 2011
0Patent Application Number
121557030
Date Filed
June 9, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A storage device is provided with a file I/O interface control device and a plurality of disk pools. The file I/O interface control device sets one of a plurality of storage hierarchies defining storage classes, respectively, for each of LUs within the disk pools, thereby forming a file system in each of the LUs. The file I/O interface control device migrates at least one of the files from one of the LUs to another one of the LUs of an optimal storage class, based on static properties and dynamic properties of each file.
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