Drive Device

A drive apparatus for performing a sequential recording for a write-once recording medium, wherein

• the write-once recording medium includes a disc management information area and a user data area,
• disc management information for managing the write-once recording medium is recorded in the disc management information area,
• the disc management information includes mapping information for mapping a first contiguous area in the user data area to a second contiguous area in the user data area,
• the mapping information is structured to map a start location of the first contiguous area to a start location of the second contiguous area and an end location of the first contiguous area to an end location of the second contiguous area,
• the drive apparatus comprising:
• a recording/reproduction section for performing a recording operation or a reproduction operation for the write-once recording medium;
• and
• a drive control section for controlling the recording/reproduction section,
• wherein
• the drive control section at least performs a process including:
• receiving a recording instruction specifying a portion of the first contiguous area as a location at which data is to be recorded;
• controlling the recording/reproduction section to record the data at a specific location in the user data area other than the location specified by the recording instruction;
• updating the mapping information so as to maintain a mapping state by the mapping information excluding the location specified by the recording instruction;
• generating new disc management information including the updated mapping information;
• controlling the recording/reproduction section to record the new disc management information in the disc management information area.