Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2004-05-27
2008-08-05
Kim, Matthew (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S147000, C711S161000, C711S162000, C707S793000, C707S793000
Reexamination Certificate
active
07409510
ABSTRACT:
Techniques are provided for performing a copy operation. An instant virtual copy operation is issued from a first portion of data to a primary mirroring portion of data, wherein the primary mirroring portion of data corresponds to a secondary mirroring portion of data, and wherein the primary mirroring portion of data and the secondary mirroring portion of data are in a mirroring relationship. The mirroring relationship is transitioned to a duplex pending state in response to determining that the mirroring relationship is in a full duplex state. When the mirroring relationship is in a duplex pending state, each block of data involved in the instant virtual copy operation is transferred from the primary mirroring portion of data to the secondary mirroring portion of data.
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Bartfai Robert Francis
Micka William Frank
Spear Gail Andrea
Stanley Warren Keith
Werner Sam Clark
Davda Janaki K.
International Business Machines - Corporation
Kim Matthew
Konrad Raynes & Victor LLP
Patel Hetul
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