Digital data management system

Details Digital data management system Digital data management system

G - Physics

06

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354/126

G06F 7/20 (2006.01) G06F 3/06 (2006.01) G06F 11/16 (2006.01) G06F 11/20 (2006.01) G06F 12/08 (2006.01) G11C 29/00 (2006.01) G06F 11/14 (2006.01)

Patent

CA 2020268

ABSTRACT OF THE DISCLOSURE A method of performing a management operation on a data storage device, the preferred embodiment describing an improved method and apparatus for merging two storage media (e.g., hard disks) in a shadow set of storage media. The preferred method of managing a shadow set of storage media accessible by one or more data sources (e.g. host processors) for I/O operations, comprises the steps of: A. carrying out successive comparisons of data stored in corresponding locations in a plurality of shadow set storage media, respectively, while maintaining access to the storage media by the data sources for I/O operations; and B. performing a management operation on at least one of the shadow set storage media, the management operation comprising: (a) interrupting I/O operations to at least the shadow set storage medium on which the management operation is performed; (b) modifying data on the shadow set storage medium whose I/O is interrupted, based on the results of the comparisons performed in step A; and (c) resuming the availability of the modified storage medium for I/O operations by the data sources. 0190u

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