The session start information indicates whether or not the new sequential recording unit is {HEAD ~ a start} of {TAIL ~ the new session} 
The session start information indicates whether or not the new sequential recording unit is { HEAD ~ a start } of { TAIL ~ the new session }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL