Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2005-07-29
2009-12-29
Chace, Christian P (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S165000, C707S793000
Reexamination Certificate
active
07640409
ABSTRACT:
Method and apparatus for data migration are described herein. In one embodiment, in response to data received from an application to be written to a first storage volume, the data is written to the first storage volume and a second storage volume substantially concurrently. When the first and second storage volumes are synchronized, a switchover is performed from the first storage volume to the second storage volume, such that subsequent data received from the application is written to the second storage volume, where writing the data to the first and second storage volumes and the switchover are performed without knowledge of the application. Other methods and apparatuses are also described.
REFERENCES:
patent: 6145066 (2000-11-01), Atkin
patent: 6820098 (2004-11-01), Ganesh et al.
patent: 6845428 (2005-01-01), Kedem
patent: 7340571 (2008-03-01), Saze
Abramovitz Norman Allen
Bosworth Thomas Rex
Chen Juntse
Egan Thomas
Musolff Bradley David
Chace Christian P
Farrokh Hashem
Hoffman Warnick LLC
International Business Machines - Corporation
Lashmit Douglas
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