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:
Mar. 04, 2003
Filed:
Jul. 26, 2001
Brian Eric Bakke, Rochester, MN (US);
Carl Edward Forhan, Rochester, MN (US);
Robert Edward Galbraith, Rochester, MN (US);
Jessica Gisi, Rochester, MN (US);
Frederic Lawrence Huss, Rochester, MN (US);
Daniel Frank Moertl, Rochester, MN (US);
Douglas David Prigge, Kenyon, MN (US);
Paul Gary Reuland, Rochester, MN (US);
Timothy Jerry Schimke, Oronoco, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for maintaining data coherency in a dual Input/Output(I/O) adapter having primary and secondary adapters, wherein each of the primary and secondary adapters includes resident write cache data and directory storage devices. The method includes utilizing a split point to separate each of the cache data and directory storage devices into first and second regions, wherein the first regions contain the primary adapter cache data and directory information and the second regions contain the secondary adapter cache data and directory information. Information stored in the primary adapter cache data and directory storage devices is mirrored into the secondary adapter cache data and directory storage devices or, alternatively, information stored in the secondary adapter cache data and directory storage devices is mirrored into the primary adapter cache data and directory storage devices utilizing a dedicated communication link, such as a high-speed serial bus, between the primary and secondary adapters.