A portion of each of {HEAD ~ the caches} of the first and second clusters is allocated to a buffer equal in size to {TAIL ~ the larger NVS buffer} 
A portion of each of { HEAD ~ the caches } of the first and second clusters is allocated to a buffer equal in size to { TAIL ~ the larger NVS buffer }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL