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:
Oct. 06, 2015
Filed:
Jul. 31, 2013
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Solutions Corporation, Tokyo, JP;
Shuji Yamazaki, Ome, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
TOSHIBA SOLUTIONS CORPORATION, Tokyo, JP;
Abstract
According to one embodiment, a storage controller includes a dividing unit, a duplication manager, and a duplication determination unit. The dividing unit divides data specified in a write request from a host computer into a plurality of chunks. The duplication manager preferentially stores a first hash value of a first chunk in a first table in a hash table in association with the first chunk when the first chunk is written to a storage device. The hash table includes a second table having more entries than the first table. The duplication determination unit first searches the first table for a third hash value matching a second hash value of a second chunk when the second hash value has been calculated.