Subsequently stored messages 57 a e will thereafter access {TAIL ~ the new index nodes} 55 a c and {HEAD ~ storage nodes} 56 a e 
Subsequently stored messages 57 a e will thereafter access { TAIL ~ the new index nodes } 55 a c and { HEAD ~ storage nodes } 56 a e
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH