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:
Oct. 20, 2015
Filed:
Aug. 13, 2008
Yoshiaki Eguchi, Yokohama, JP;
Akira Yamamoto, Sagamihara, JP;
Yasutomo Yamamoto, Sagamihara, JP;
Manabu Kitamura, Kawasaki, JP;
Ai Satoyama, Sagamihara, JP;
Yoshiaki Eguchi, Yokohama, JP;
Akira Yamamoto, Sagamihara, JP;
Yasutomo Yamamoto, Sagamihara, JP;
Manabu Kitamura, Kawasaki, JP;
Ai Satoyama, Sagamihara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A first storage system comprises a first logical volume, and a first controller that has a first memory. A second storage system comprises a second physical storage device that constitutes the basis of a second logical volume and a journal area, and a second controller that has a second memory. At least the first memory stores a write unit size, which is the size of a write data element. The journal area is a storage area in which is stored a journal data element, which is a data element that is stored in any block of a plurality of blocks configuring the first and/or second logical volume, or a data element that is written to this block. The size of the journal data element, and the size of the respective blocks that are managed as the respective components of the first and second logical volumes are the write unit size.