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. 15, 2008
Filed:
Jan. 23, 2006
Teiko Kezuka, Odawara, JP;
Tetsuya Abe, Hiratsuka, JP;
Teiko Kezuka, Odawara, JP;
Tetsuya Abe, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A disk array system includes a memory that stores first key data inherent to the disk array system, and a disk controller that controls data input/output to/from disk drives. Each of the disk drives includes a disk medium, and an HDD controller, the disk medium having a system area that stores second key data inherent to a disk array system, and a data area that stores user data, the HDD controller controlling data input/output to/from the system area and the data area. The HDD controller, upon a disk drive from among the disk drives being mounted in the disk array system, comparing the first key data and the second key data, and if they do not correspond to each other, operating in an operation mode in which read access from the disk controller to the data area is prohibited.