Invention Application
US20070220312A1 Apparatus, system, and method for switching a volume address association in a point-in-time copy relationship 失效
用于在时间点复制关系中切换卷地址关联的装置,系统和方法

Apparatus, system, and method for switching a volume address association in a point-in-time copy relationship
Abstract:
An apparatus, system, and method are disclosed for switching a volume address association in a point-in-time copy relationship. A copy module creates a point-in-time copy structure of a source volume at a target volume. A migration module copies data from the source volume to the target volume. A detection module detects data corruption in the source volume. A switch module switches a logical volume address from a source volume address of the source volume to a target volume address of the target volume in response to detecting the data corruption, redirecting data reads and writes to the target volume. In one embodiment, a tracking module tracks a current target volume copy of source volume data and redirects an access for source volume data without the current target volume copy to the source volume.
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