Patent ID: 6728849
Filing Date: 2004-04-27
Classification: G06F,Y10S

Abstract:
A storage system for data communicated between the storage system and at least one processor unit, comprising:a first storage unit coupled to the processor unit and having a plurality of first storage areas for storing data written in response to data requests from the processor unit, the first storage unit maintaining a pair table identifying storage area pairs, each of the storage area pairs being one of the plurality of first storage areas and, for each such storage area, a corresponding second storage area; a second storage unit communicatively coupled to the first storage location and including the corresponding second storage areas; and a priority table associated with the pair table having assigned priority values for each of the number of storage area pairs; wherein, the first storage unit receives requests to write data to a ones of the first storage areas to communicate the data to the second storage unit to write the data to ones of the second storage areas corresponding to the one first storage areas identified in the pair table according to the assigned priority.