monitoring whether {HEAD ~ currently utilized performance capabilities} of each of the storage arrays are within {TAIL ~ a predetermined range} of maximum performance capabilities for the storage arrays; and 
within
monitoring whether { HEAD ~ currently utilized performance capabilities } of each of the storage arrays are within { TAIL ~ a predetermined range } of maximum performance capabilities for the storage arrays ; and
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH