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:
Nov. 01, 2005
Filed:
Jun. 24, 2003
Eiju Katsuragi, Odawara, JP;
Mikito Ogata, Odawara, JP;
Akira Kurano, Odawara, JP;
Toshihiko Tamiya, Hadano, JP;
Akira Yamamoto, Sagamihara, JP;
Naoya Takahashi, Yokohama, JP;
Eiju Katsuragi, Odawara, JP;
Mikito Ogata, Odawara, JP;
Akira Kurano, Odawara, JP;
Toshihiko Tamiya, Hadano, JP;
Akira Yamamoto, Sagamihara, JP;
Naoya Takahashi, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A disk array device selects a redundant generation method for reducing the overhead and improving the reliability associated with generating redundant data. The disk array device includes a disk controller connected to and controlling an array of disk drives. The disk controller includes a redundant data generator, a difference data generator, and a redundant data generation method selector. The redundant data generator is able to generate redundant data via a read and modify method and an all stripes method. The disk array device selects a method of generating redundant data from a method of read and modify and all stripes, and a method of generation in a drive and a method of difference, both of which are executed to generate redundant data on a disk drive.