Konrad Raynes Davda & Victor LLP
Exchanging locations of an out of synchronization indicator and a change recording indicator via pointers
A first data structure stores indications of storage locations that need to be copied for forming a consistency group. A second data structure stores indications of new host writes, subsequent to starting a point in time copy operation to form the consistency group. Locations of the first data structure and the second data structure are exchanged, subsequent to the consistency group being formed successfully.
INTERNATIONAL BUSINESS MACHINES CORPORATION
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Theresa M. Carol S. Mark L. Theodore T.
Brown Mellgren Lipets Harris, Jr.