METHOD, APPARATUS AND STORAGE DEVICE FOR DATA PROTECTION
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United States of America Patent
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Issued Date -
Sep 3, 2009
app pub date -
Feb 27, 2009
filing date -
Feb 28, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for data protection is disclosed. The method includes: setting a Logical Unit Number (LUN) key area; obtaining data change amount when data in the preset LUN key area change; determining whether the data change amount exceeds a preset threshold, and a snapshot is created if the data change amount exceeds the preset threshold. The disclosure further discloses an apparatus for data protection and a storage device including the apparatus for data protection. In embodiments of the disclosure, certain parts in the LUN are set to be LUN key area, and a quantitative strategy is initiated, i.e., a snapshot is created only when the data change amount of the LUN key area exceeds a preset threshold. Snapshots are not created when the data in the key has no change or little change, in order to avoid waste of resources.
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