Patent ID: 7869318

Claim:
A write-once-type recording medium comprising: a data area to record therein the record data; a control information recording area, which includes a definite defect management area to record therein defect management information of said data area, to record therein information for controlling at least one of operations of recording and reading in said data area; and a shared area, which is disposed between said control information recording area and said data area, to record therein evacuation data which is record data to be recorded at a position of a defect in said data area and to temporarily record therein to temporarily record therein the defect management information of said data area, the evacuation data being recorded with one predetermined point which exists in said shared area as a start point, the defect management information being recorded with another predetermined point which exists at a different point from the one point as a start point, in said shared area, wherein the defect management information includes (i) an evacuation source address which is an address of the position of the defect in the data area and (ii) an evacuation destination address which is an address of a recording position of the evacuation data, and further includes (iii) a start address of the data area, (iv) an end address of the data area and (v) a size of the shared area, in the shared area, the evacuation data is separately recorded from the defect management information, an area portion in the shared area, into which the evacuation data is recorded, is outer than an area portion in the shared area, into which the defect management information is recorded.