Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 19, 2006
Patent Application Number
09538700
Date Filed
March 30, 2000
Patent Citations Received
Patent Primary Examiner
Patent abstract
A disaster-tolerant data backup and remote copy system which is implemented as a controller-based replication of one or more LUNs (logical units) between two remotely separated pairs of array controllers connected by redundant links. In the situation wherein an array controller fails during an asynchronous copy operation, the partner array controller uses a ‘micro log’ stored in mirrored cache memory to recover transactions, in order, which were ‘missed’ by the backup storage array when the array controller failure occurred.
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