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. 14, 2015
Filed:
Jan. 17, 2013
Hitachi, Ltd., Tokyo, 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 microprocessor receives a write request from a host computer and data Dto Dexist in a cache slot, the microprocessor reads the LBA of each piece of the data, manages each piece of the data Dto Dusing a bitmap table by 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 FMPK stores each piece of update data in a specified block in the flash memory based on the specific command CMD.