Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2006-02-17
2010-10-26
Beausoliel, Robert (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S005110, C714S042000, C711S162000
Reexamination Certificate
active
07823007
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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Boyd Kenneth W.
Day III Kenneth F.
Edel Stephen F.
Wolfgang John J
Yudenfriend Harry M.
Beausoliel Robert
International Business Machines - Corporation
Kunzler Needham Massey & Thorpe
Manoskey Joseph D
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