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. 29, 2013
Filed:
Oct. 30, 2008
Henry Esmond Butterworth, Chandlers Ford, GB;
Kenneth Fairclough Day, Iii, Tuscon, AZ (US);
Philip Matthew Doatmas, Tuscon, AZ (US);
John Jay Wolfgang, Winston-Salem, NC (US);
Vitaly Zautner, Haifa, IL;
Aviad Zlotnick, D.N.G.T., IL;
Henry Esmond Butterworth, Chandlers Ford, GB;
Kenneth Fairclough Day, III, Tuscon, AZ (US);
Philip Matthew Doatmas, Tuscon, AZ (US);
John Jay Wolfgang, Winston-Salem, NC (US);
Vitaly Zautner, Haifa, IL;
Aviad Zlotnick, D.N.G.T., IL;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method is disclosed for reliably updating a data group in a read-before-write data replication environment. The method reliably updates the data group by receiving an updated data group sent from a first storage medium to a second storage medium, comparing the updated data group with a previous data group previously existing on the second storage medium and writing the updated data group to the second storage medium. The read-before-write and differencing method disclosed maintain reliability by storing multiple copies of changes made to the second storage medium during and after the write process.