The present invention provides method, apparatus and program product by which a data storage controller dynamically reconfigures {HEAD ~ NVS} and cache memory in {TAIL ~ multiple clusters} 
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The present invention provides method , apparatus and program product by which a data storage controller dynamically reconfigures { HEAD ~ NVS } and cache memory in { TAIL ~ multiple clusters }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL