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:
Jan. 22, 2013
Filed:
Aug. 20, 2009
Yoshiki Kano, Yokohama, JP;
Masanori Takada, Yokohama, JP;
Akira Yamamoto, Sagamihara, JP;
Akihiko Araki, Yokohama, JP;
Masayuki Yamamoto, Sagamihara, JP;
Jun Kitahara, Yokohama, JP;
Sadahiro Sugimoto, Kawasaki, JP;
Yoshiki Kano, Yokohama, JP;
Masanori Takada, Yokohama, JP;
Akira Yamamoto, Sagamihara, JP;
Akihiko Araki, Yokohama, JP;
Masayuki Yamamoto, Sagamihara, JP;
Jun Kitahara, Yokohama, JP;
Sadahiro Sugimoto, Kawasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The amount of data to be stored in a semiconductor nonvolatile memory can be reduced and overhead associated with data processing can be reduced. When a microprocessorreceives a write request from a host computerand data Dto Dexist in a cache slot, the microprocessorreads the LBA of each piece of the data, manages each piece of the data Dto Dusing a bitmap tableby associating them with their LBAs, generates a specific command CMD based on the LBAs of the data Dto D, adds the data Dto Dand addresses ADDto ADDindicating where the data Dto Dare to be stored, to the specific command CMD, and sends it to an FMPK. The FMPKstores each piece of update data in a specified block in the flash memorybased on the specific command CMD.