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:
Jul. 24, 2012
Filed:
Mar. 18, 2011
Naoto Matsunami, Hayama, JP;
Koji Sonoda, Sagamihara, JP;
Akira Yamamoto, Sagamihara, JP;
Masafumi Nozawa, Odawara, JP;
Masaaki Iwasaki, Tachikawa, JP;
Naoto Matsunami, Hayama, JP;
Koji Sonoda, Sagamihara, JP;
Akira Yamamoto, Sagamihara, JP;
Masafumi Nozawa, Odawara, JP;
Masaaki Iwasaki, Tachikawa, JP;
Hitachi, Ltd., Tokyo, JP;
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.