Patent ID: 7907488

Claim:
A disc drive for managing defects in a recording medium, the recording medium comprising a lead-in area, a user data area, and a lead-out area, the disc drive comprising: a pickup to record data on and read data from the recording medium; and a controller to control the pickup to: allocate a first temporary defect management area (TDMA) to the lead-in area of the recording medium; allocate a second TDMA between the lead-in area of the recording medium and the user data area of the recording medium; reproduce most recently updated temporary defect information (TDFL) and temporary defect management information (TDDS) that are recorded on the first TDMA or the second TDMA; reproduce user data recorded on the user data area using the TDFL; and record the most recently updated temporary defect information (TDFL) and temporary defect management information (TDDS) in a defect management area (DMA) provided in the lead-in area and/or the lead-out area of the recording medium when the recording medium is finalized; wherein the TDFL comprises: information on a position of a defective area that occurs within the user data area; and information on a position of a replacement area replacing the defective area; and the TDDS comprises information on a recording position of the TDFL.