ninth means for holding a portion of the recording management information in one of {HEAD ~ the recording management areas} of {TAIL ~ 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 
of
ninth means for holding a portion of the recording management information in one of { HEAD ~ the recording management areas } of { TAIL ~ 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 OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH