In the example shown, {HEAD ~ portion} of data stream or data block 200 is received by {TAIL ~ a data storage system}  
In the example shown , { HEAD ~ portion } of data stream or data block 200 is received by { TAIL ~ a data storage system }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH