CPC G06F 11/1458 (2013.01) [G06F 11/1451 (2013.01)] | 9 Claims |
1. A data duplication system comprising:
a first storage having a first volume for reading and writing data by an external device, and a first data protection area for storing backup images of multiple generations of the first volume and that cannot be accessed by external devices; and
a second storage being coupled to the first storage,
wherein the first storage creates a second volume for providing backup image of a particular generation of the multiple generations of the first volume stored in the first data protection area, and
wherein the second storage:
creates a third volume for storing data comprising the backup image of the particular generation of the first volume provided by the second volume;
creates a first virtual volume forming a pair that copies the data of the backup image of the particular generation to the third volume;
makes the second volume accessible via the first virtual volume by mapping the first virtual volume as an external source and the second volume as an external destination;
reads a backup image of the second volume through the first virtual volume by copying data from the first virtual volume to the third volume; and
stores the data comprising the backup image of the particular generation of the first volume in said third volume by writing to said third volume.
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