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:
Jul. 16, 2013
Filed:
Jan. 30, 2012
Akihiko Araki, Yokohama, JP;
Yoshiki Kano, Yokohama, JP;
Sadahiro Sugimoto, Yokohama, JP;
Yusuke Nonaka, Sagamihara, JP;
Akihiko Araki, Yokohama, JP;
Yoshiki Kano, Yokohama, JP;
Sadahiro Sugimoto, Yokohama, JP;
Yusuke Nonaka, Sagamihara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
To extend endurance and reduce bit cost, a storage apparatus includes a controller and a first storage device and a second storage device having a smaller erase count upper limit than the first storage device. Area conversion information includes correspondence of a first address of a data storage destination and a second address of a data storage area The controller selects an area corresponding to the first address, determines whether a rewrite frequency of the selected area is equal to or larger than a first threshold and, when the rewrite frequency is equal to or larger than the threshold, selects an area of the first storage device, and, when the rewrite frequency is smaller than the threshold, selects an area of the second storage device and maps the address of the selected area to the first address.