Patent ID: 6658591
Filing Date: 2003-12-02
Classification: G01B,G06F

Abstract:
A logically partitioned data processing system; comprising:a plurality of processors, each of which assigned to one of a plurality of partitions; and a plurality of private data areas, each of which is assigned to one of the plurality of processors and each of the plurality of private data areas includes a primary copy of data and an alternate copy of data; wherein each of the plurality of processors is configured, during data fetch operations, to attempt to retrieve data from the primary copy of the data and, responsive to a failure to retrieve the data from the primary copy, attempting to retrieve the data from the alternate copy of the data; and each of the plurality of processors is configured, responsive to a failure of a write operation to the primary copy of data, to copy data from the alternate copy of the data into the primary copy of the data and re-attempt the write operation.