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:
Feb. 01, 2011
Filed:
Aug. 08, 2008
Kenneth Wayne Boyd, Tucson, AZ (US);
Kenneth Fairclough Day, Iii, Tucson, AZ (US);
Philip Matthew Doatmas, Tucson, AZ (US);
John Jay Wolfgang, Tucson, AZ (US);
Kenneth Wayne Boyd, Tucson, AZ (US);
Kenneth Fairclough Day, III, Tucson, AZ (US);
Philip Matthew Doatmas, Tucson, AZ (US);
John Jay Wolfgang, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A network component useful in tracking write activity by writing logs containing write address information is described. The tracking component may be used in networked systems employing data mirrors to record data block addresses written to a primary storage volume during the time a data mirror is unavailable. The tracking component can be available to any network originating node, and may therefore track write activity on multiple volumes. At the time a data mirror is reconstructed, the log written may be used to construct a list of block addresses pointing to locations on a primary storage volume wherein data differs from a secondary storage volume member of the mirror. The locations may be copied from the primary to secondary storage volume to reconstruct the data mirror. The performance impact of the tracking component is minimal and a shared network resource is offered that increases fault tolerance in the event of backup device failures.