ninth means for holding a portion of {TAIL ~ the recording management information} in one of the recording management areas of {HEAD ~ the first and second recording layers} which relates to the second on disc position during the simply reformatting of the disc by the eighth means 
ninth means for holding a portion of { TAIL ~ the recording management information } in one of the recording management areas of { HEAD ~ the first and second recording layers } which relates to the second on disc position during the simply reformatting of the disc by the eighth means
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD 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