{HEAD ~ The CSA primary device} also manages the storage arrays and {TAIL ~ the logical data volume} by monitoring the storage arrays to determine whether any of the storage arrays is about to reach its saturation point, typically due to changing performance requirements of all of the logical data volumes on the storage arrays 
{ HEAD ~ The CSA primary device } also manages the storage arrays and { TAIL ~ the logical data volume } by monitoring the storage arrays to determine whether any of the storage arrays is about to reach its saturation point , typically due to changing performance requirements of all of the logical data volumes on the storage arrays
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