Patent ID: 7469095

Claim:
A method for DVD-ROM backwards-compatible defective sector management in recordable DVD media comprising the steps of: allocating a first block of logically contiguous sectors for storing indivisible data to the recordable DVD media, wherein said indivisible data is selected from at least one of the group comprising control data, backup control data or navigation data and said indivisible data spans a plurality of logically contiguous sectors, including at least one non-defective sector, of said first block; detecting and locating a defective sector in said first block of sectors; and, responsive to detecting and locating said defective sector, enforcing a rule that indivisible data cannot be discontinuously stored in the recordable DVD media such that said indivisible data is contiguously stored in a plurality of logically contiguous sectors of a second block by shifting said indivisible data from said first block to said second block in the recordable DVD media to ensure that the contiguity of the indivisible data is maintained, said second block not containing said detected and located defective sector.