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:
Dec. 20, 2011
Filed:
Feb. 23, 2009
Applicants:
Shuhji Yamada, Kanagawa, JP;
Toshio Kakihara, Kanagawa, JP;
Katsuhiro Imoto, Tokyo, JP;
Akihiko Mouri, Tokyo, JP;
Inventors:
Shuhji Yamada, Kanagawa, JP;
Toshio Kakihara, Kanagawa, JP;
Katsuhiro Imoto, Tokyo, JP;
Akihiko Mouri, Tokyo, JP;
Assignee:
Hitachi Global Storage Technologies, Netherlands B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In one embodiment, a HDD creates a segment table to associate an address of user data in a flash memory with an LBA in a magnetic disk. The HDD updates the segment table in a DRAM and saves it to the flash memory at a specific timing. The HDD creates journals indicating the update of the segment table and saves it to the flash memory. The latest segment table can be restored using the segment table and the journals in the flash memory.