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