{HEAD ~ The message} is physically stored in a hierarchical message store using the index node and storage node identifiers for {TAIL ~ subsequent retrieval} and scanning 
{ HEAD ~ The message } is physically stored in a hierarchical message store using the index node and storage node identifiers for { TAIL ~ subsequent retrieval } and scanning
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH