Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2008-01-29
2008-01-29
Le, Dieu-Minh (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S002000
Reexamination Certificate
active
10772017
ABSTRACT:
In a continuous data protection system having a primary volume and a secondary volume, a method for data recovery begins by selecting a snapshot of the primary volume to be recovered and a location on which the snapshot is to be loaded. A point in time (PIT) map is created for the selected snapshot, and the selected snapshot is loaded at the selected location. A data block from the PIT map is resolved to determine which block on the secondary volume is presented as being part of the snapshot. The snapshot is accessed via a host computer as if the snapshot was the primary volume at an earlier point in time, corresponding to the time of the selected snapshot.
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“Alacritus, Hitachi CP and Nissho Team
Blaser Rico
Chang Yafen Peggy
Johnson Randall
Johnston Craig Anthony
Saxena Pawan
Le Dieu-Minh
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Volpe and Koenig P.C.
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