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:
Dec. 29, 2009
Filed:
Jun. 29, 2004
Kenneth A. Halligan, Leominster, MA (US);
Arieh Don, Newton, MA (US);
Michael Scharland, Franklin, MA (US);
David Joshua Brown, Chelmsford, MA (US);
Patrick Brian Riordan, Watertown, MA (US);
Kenneth A. Halligan, Leominster, MA (US);
Arieh Don, Newton, MA (US);
Michael Scharland, Franklin, MA (US);
David Joshua Brown, Chelmsford, MA (US);
Patrick Brian Riordan, Watertown, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Described are techniques for use with online data copying or migration. Data is pushed from a source to a target device while one or both of the source and target devices are available for use by one or more host systems. The host systems may perform I/O operations to the source and/or target devices while the data migration is ongoing if a copy session is defined on the data storage system(s) of the source and/or target devices. A copying operation performs data migration from the source to the target device. A migration vector is used to indicate which portions of the source have been migrated. A change vector may be associated with each of the source and/or target devices to indicate portions that have been modified in order to perform a differential copy operation.