Data storage methods for hierarchical copies

Details Data storage methods for hierarchical copies Data storage methods for hierarchical copies

2005-05-06

2009-06-23

Tsai, Sheng-Jen (Department: 2186)

Electrical computers and digital processing systems: memory

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07552309

ABSTRACT:
A method for copying a logical volume in a data storage system, including forming a first logical volume having one or more logical partitions and storing data at a physical location associated with the one or more logical partitions. The method further includes receiving a first command to copy the first logical volume to a second logical volume, and responsively to the first command, assigning the one or more logical partitions to a meta-volume and linking the meta-volume to the first and second logical volumes. The method also includes receiving a second command to access the data in at least one of the first and second logical volumes, responsively to the second command, using a partition descriptor record associated with the meta-volume to identify the physical location, and providing access to the data at the physical location.

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