In the Figs., the relative size of {HEAD ~ the pre change buffers} 133A, 135A, {TAIL ~ 143A} and 145A of the NVS and cache of the first and second clusters 130 and 140 is exaggerated for clarity 
In the Figs . , the relative size of { HEAD ~ the pre change buffers } 133A , 135A , { TAIL ~ 143A } and 145A of the NVS and cache of the first and second clusters 130 and 140 is exaggerated for clarity
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH