The method includes closing an opened session by closing {TAIL ~ all opened sequential recording units} of {HEAD ~ the opened session}, opening a new session having a new sequential recording unit, and recording session start information on the recording medium 
The method includes closing an opened session by closing { TAIL ~ all opened sequential recording units } of { HEAD ~ the opened session } , opening a new session having a new sequential recording unit , and recording session start information on the recording medium
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH