Patent Number: 8,793,456

Title: Automated migration to a new target volume via merged bitmaps to maintain consistency

Abstract: Aspects of the present invention relate to data migration and/or disaster recovery. One embodiment enables merging of bitmaps to allow for automation of the process of switching to a different target volume on the same storage subsystem without major interruption of data recovery capability and limited interruption of host I/O to the source volumes during the migration. In one approach, the migration of data onto a new target volume within the same storage subsystem as the original target volume is automated, without requiring the user to manually create or remove any new copy relationships.

Inventors: Blea; Amy N. (Round Rock, TX), Blea; David R. (Tucson, AZ), McBride; Gregory E. (Vail, AZ), Wolfgang; John J. (Midlothian, VA)

Assignee: International Business Machines Corporation

International Classification: G06F 11/00 (20060101)

Expiration Date: 7/29/12018