Patent ID: 7823007
Filing Date: 2010-10-26
Classification: G06F

Abstract:
1. An apparatus to switch a volume address association in a point-in-time copy relationship, the apparatus comprising: a copy module configured to create a point-in-time copy structure of a source volume at a target volume; a migration module configured to copy data from the source volume to the target volume; a detection module configured to detect data corruption in the source volume; a switch module configured to switch 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, the switch module being configured to redirect an access request for source volume data directed to the source volume to the target volume in response to detecting the data corruption; and a tracking module configured to redirect the access request for source volume data redirected to the target volume to the source volume if the target volume does not have a current target volume copy of the requested source volume data; wherein the copy module, migration module, detection module, and switch module each comprise at least one of logic hardware, and a computer processor and computer-readable storage medium storing executable code executed by the processor.