Method for tracking defective sectors in re-writable disk media

Details Method for tracking defective sectors in re-writable disk media Method for tracking defective sectors in re-writable disk media

2006-02-14

2006-02-14

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S769000, C369S053150, C369S053170

Reexamination Certificate

active

07000152

ABSTRACT:
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.

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