Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-01-03
2009-06-23
Shah, Sanjiv (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C709S213000, C709S216000, C709S217000, C709S218000, C709S219000, C711S147000, C711S161000, C711S141000
Reexamination Certificate
active
07552295
ABSTRACT:
Provided are a method, system, and program for maintaining consistency when mirroring data using different copy technologies. Update groups having updates to primary storage locations are formed using a first copy technology. The updates in the update groups are copied to secondary storage locations. Update groups having updates to primary storage locations are formed using a second copy technology, wherein the updates in the update groups are copied to secondary storage locations. Indication is made in a data structure of a time of an update in response to including the update in one of the update groups formed using the first copy technology. Indication is also made in the data structure of a time of the update group formed using the second copy technology.
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Bartfai Robert Francis
Boyd Kenneth Wayne
Day III Kenneth Fairclough
Kern Robert Frederic
McBride Gregory Edward
Ayash Marwan
International Business Machines - Corporation
Konrad Raynes & Victor LLP
Shah Sanjiv
Victor David W.
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