Source-target relations mapping
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United States of America Patent
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Jul 21, 2015
Grant Date -
Jul 4, 2013
app pub date -
Feb 22, 2013
filing date -
Feb 23, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A data preservation function is provided which, in one embodiment, includes indicating by a map, usage of a particular map extent range by a relationship between a source extent range of storage locations on a source storage device containing data to be preserved in the source extent range, and a target extent range mapped to the map particular extent range. In another aspect, in response to receipt of a data preservation command, a data preservation operation is performed including determining whether a map indicates availability of a map extent range mapped to the identified target extent range. Upon determining that a particular map indicates availability of a map extent range mapped to the identified target extent range, a relationship between the identified source extent range and the identified target extent range is established. Other features and aspects may be realized, depending upon the particular application.
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