Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2006-10-10
2006-10-10
Beausoliel, Robert (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S011000, C714S012000, C714S013000, C707S793000, C707S793000
Reexamination Certificate
active
07120824
ABSTRACT:
A method, apparatus and program storage device for maintaining data consistency and cache coherency during communications failures between nodes in a remote mirror pair. A link between a mirror pair of storage systems is monitored. During a link failure between a first storage system and a second storage systems, reads and writes on the first and second storage systems are independently performed and write data and associated timestamps are maintained for the write data for each write in a queue on the first and second storage system. After link reestablishment, volume sets on the first and second storage systems are resynchronized using write data and associated timestamps.
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Burton David Alan
Otterness Noel Simen
Stewart Alan Lee
Beausoliel Robert
Chambliss Bahner & Stophel P.C.
Ehne Charles
Lynch David W.
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