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. 30, 2019
Filed:
Feb. 17, 2017
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Satoshi Iwata, Yokohama, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A processor controls a second storage device including a plurality of media that store data stored in a first storage device. The processor calculates a ratio of the size of each of a plurality of data blocks, which are classified according to a plurality of pieces of dimension information in data stored in two or more of the plurality of media, to the amount of data stored in the two or more of the plurality of media. The processor determines, based on a calculated ratio, whether a data block is to be duplicated, generates a duplicate of the data block determined to be duplicated, and stores the generated duplicate of the data block into another medium of the plurality of media, except for the two or more media. This can reduce the number of times of changing a medium, and suppress a lowering in the capacity efficiency. Dimension information may be an axis of obtaining data. In additionally disclosed embodiments, data may be arranged based on data blocks originally generated for reliability and considering the axis of obtaining data, and data at an end portion of a medium may be redundantly stored in the front or top portion of a subsequent medium.