METHOD OF, DEVICE AND RECORD CARRIER FOR POWER OPTIMIZED DEFECT MANAGEMENT

摘要

The present invention relates to a scheme for defect management for an optical record carrier, for instance an SFFO disc, in a mobile environment. The record carrier comprises fragments of data, each fragment (Fn to Fn+2) comprising one or more blocks. A fragment has a size of approximately 5 MB and will be read and written in one sweep by the apparatus. Spare areas are present on the disc for re-mapping defect blocks to a spare area. These spare areas are located in the fringes of the fragments. The result is fully optimised to reduce power consumption without compromising the defect management. Associating a spare area with a fragment has the advantage that there will be no additional seek overhead, which will save power. Defect management can be implemented by the drive, so the application is unaware of the re-mapping. Real-time guarantees can be met, because reading a re-mapped block will not cause jumping in the program area of the disc. The spare area may only be read when needed.