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:
May. 05, 2009
Filed:
Mar. 30, 2006
David Haase, Fuquay Varina, NC (US);
Somnath A. Gulve, Morrisville, NC (US);
Saurabh M. Pathak, Chapel Hill, NC (US);
Michael D. Haynes, Raleigh, NC (US);
David Haase, Fuquay Varina, NC (US);
Somnath A. Gulve, Morrisville, NC (US);
Saurabh M. Pathak, Chapel Hill, NC (US);
Michael D. Haynes, Raleigh, NC (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Methods, systems, and computer program products for postponing bitmap transfers and eliminating configuration information transfers during trespass operations in a disk array environment are disclosed. According to one method, a clone group is stored on a disk array, the clone group including a logical unit (LUN) representing a storage partition on the disk array and a clone of the LUN, the clone being a copy of the data referenced by the LUN. The clone group is associated with a first storage processor (SP) for writing data to the disk array. Changes between the LUN and the clone are tracked by maintaining a data structure indicative of the changes in a memory associated with the first SP. The association of the clone group is changed to a second SP for writing data to the disk array without transferring the data structure to memory associated with the second SP.