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:
Apr. 02, 1996
Filed:
Mar. 04, 1993
Robert Baird, San Jose, CA (US);
Gerald P Bozman, Oakland, NJ (US);
George Eisenberger, White Plains, NY (US);
Albert Kamerman, Pound Ridge, NY (US);
Alexander S Lett, Mahopac, NY (US);
John J McAssey, Monroe, NY (US);
James J Myers, San Francisco, CA (US);
William H Tetzlaff, Mount Kisco, CA (US);
Pong-sheng Wang, San Jose, CA (US);
International Business Machines, Armonk, NY (US);
Abstract
A computer implemented method for robustly copying pages to system managed storage in order to maintain data in a consistent state and in order to provide continuous access availability of the pages to executing applications. The method achieves data consistency by atomically shadow copying application referenced pages and amending directories in a failure independent medium on (1) an access path interrupt as well as on (2) a page update basis. Availability is enhanced by duplexing the pages and directories as part of the atomic shadow copying step.