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:
Apr. 15, 2008
Filed:
May. 27, 2005
Naoki Higashijima, Tokyo, JP;
Yoshihiro Uchiyama, Odawara, JP;
Naoki Higashijima, Tokyo, JP;
Yoshihiro Uchiyama, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The storage control device and storage device error control method of the present invention prevent incorrect data from being read out to the host in advance, and thus improve the reliability. For example, the controllerthat controls the disk array subsystem disperses and stores data on respective disksthrough, calculates parity data, and stores this parity data on a disk. In cases where the updating of a certain block (D) fails, so that data is not written into this block, this is an uncorrectable error. The data of this block (D) is recovered on the basis of data and parity data stored on the other disks. The controlleralso recovers data for another block (D) following the block (D) on the basis of other associated data and parity data. As a result, even if by some chance the block (D) which has not suffered an uncorrectable error stores old data, the correct data can be recreated and provided to the host