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:
May. 13, 2014
Filed:
Mar. 30, 2012
Yoshihiro Oikawa, Kaisei, JP;
Akifumi Suzuki, Yokohama, JP;
Taichi Yotsumoto, Hirastuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage system has: one or more flash memory chips, each of which has a storage region configured by a plurality of blocks; and a device controller that controls access to data corresponding to the storage regions of the flash memory chips. The device controller manages for each of the blocks the number of determination readings for determining read disturb on the basis of a read request with respect to data of each block from a higher-level device, and, when there is a block for which the number of determination readings becomes equal to or larger than a threshold represented as a standard indicating a predetermined state related to read disturb, transmits, to the higher-level device, notification information that includes information indicating that read disturb of the block enters the predetermined state.