A method for updating a defect list in a DVD can include processing sectors on the DVD during a playback operation; adding references to selected ones of the processed sectors to a defect candidate list; identifying defective sectors among the selected ones of the processed sectors; and, adding references to the identified defective sectors to the defect list. Additionally, the method can include removing from the defect candidate references to each sector for which a corresponding reference has been added to the defect list. The step of adding references to selected ones of the processed sectors to a defect candidate list can include detecting an unrecoverable error during the playback operation; identifying a processed sector associated with the unrecoverable error; and, adding a reference to the identified sector to the defect candidate list. Also, the identifying step can include identifying each sector having a reference in both the defect list and the defect candidate list; removing references to the identified sectors from the defect candidate list; and, determining whether each sector remaining in the defect candidate list is a defective sector.
This application claims the benefit under 35 U.S.C. .sctn. 365 of International Application PCT/US00/30605, filed Nov. 7, 2000, which was published in accordance with PCT Article 21(2) on May 17, 2001 in English; and which claims benefit of U.S. provisional application Ser. No. 60/164,806 filed Nov. 10, 1999
A hard disk drive (HDD) defect list searching method includes checking whether a target track is on a non-defective track list when a command to access the target track is applied, obtaining defect information from the non-defective track list if the target track is on the non-defective track list, searching for a defect list if the target track is not on the non-defective track list and obtaining defect information, including the number of defects existing between a starting track of a zone where the target track belongs and the target track and the number of defects in the target track, from the defect list, and obtaining defect information on the target track and defect information on tracks ranging from the target track to a next defective track from the defect list and storing the defect information to the target track and the next defective track on the non-defective track list.
A multi-layer optical writable disc (D) comprises at least two layers (L1, L2, . . . ) and at least two defect management areas (DF1, DF2, . . . ). A first defect management area (DF1) is positioned on a first layer (L1) of the at least two layers at a first radial position (RP1), and a second defect management area (DF2) is positioned on a second layer (L2) of the at least two layers at a second radial position (RP2). The first radial position (RP1) and second radial position (RP2) are different.
A multi-layered information recording medium comprising a plurality of recording layers, a user data area for recording user data, provided in at least two of the plurality of recording layers, and a defect list storing area for storing a defect list. When at least one defective area is detected in the user data area, the defect list is used to manage the at least one defective area.
A multi-layered information recording medium comprising a plurality of recording layers, a user data area for recording user data, provided in at least two of the plurality of recording layers, and a defect list storing area for storing a defect list. When at least one defective area is detected in the user data area, the defect list is used to manage the at least one defective area.
A multi-layered information recording medium comprising a plurality of recording layers, a user data area for recording user data, provided in at least two of the plurality of recording layers, and a defect list storing area for storing a defect list. When at least one defective area is detected in the user data area, the defect list is used to manage the at least one defective area.
