Patent ID: 8572339
Filing Date: 2013-10-29
Classification: G06F

Abstract:
1. A computer program product, for use with a host and a storage area network which includes a storage controller and storage devices, the computer program product comprising a computer readable storage medium having computer readable program code embodied therein that executes to perform operations, the operations being in the storage controller and storage devices of the storage area network, the operations comprising: receiving a data preservation command identifying a set of data on a source storage device to be preserved at a point in time wherein the data preservation command includes a parameter; and in response to the command, performing a data preservation operation including: establishing a relationship between storage locations of the source storage device and a target storage device; identifying as a function of prior update usage of the data to be preserved and the parameter of the data preservation command, a portion of the data which is more likely to be the subject of updates during at least a portion of the data preservation operation as compared to the remaining portion of the data to be preserved; and copying the identified portion of the data to the target storage device.