Abstract: The invention provides a searching and recording method to search a corresponding replacement block for a defect block to correctly record digital data onto an optical recording medium. When the digital data which is designated to be recorded in a predetermined block in a data area of a target data management area (DMA) is determined to be recorded in another block, inspect the detect table to find an idle recording entry in a target detect table block (DTB) corresponding to the target DMA for recording. If no spared entry in the corresponding target DTB, sequentially leapfrog around the target DTB back and forth to search in the adjacent DTB for any idle entry. Record the digital data in a replacement block corresponding to the entry in the spare area of a DMA corresponding to the searched DTB.

Abstract: The invention is a method for reading special track-related information on an optical storage medium. The medium sequentially has at least one session. Each session comprises a lead-in area and at least one track, wherein at least one session comprising one or more data tracks. A pickup head is firstly moved to read special track-related information in a target session. When reading the target session, first read Table of Content data of the lead-in area in the target session, and then sequentially read the data tracks in the target session for reading special track-related information. Only when finishing reading all data tracks in the target session, then the pickup head is moved to the next session for continuing reading the special track-related information.

Abstract: A method for accessing data on an optical disk by a drive. The optical disk includes spare packets and data blocks. Each data block is for recording data written to the optical disk, and each spare packet has spare blocks for replacing defect blocks to record data. The drive has a memory allocated with buffers, and each buffer is for recording data of a spare packet. When writing data of a first buffer to a packet of the optical disk, if a plurality of first spare blocks are found defective, then searching a second spare packet which has spare blocks for replacing the first blocks. If the second spare packet is not read in a buffer, reading the second spare packet into a releasable buffer. After copying data written to the first spare blocks from the first buffer to the second buffer, making the first buffer releasable.

Abstract: A method for accessing data in an optical disk with a drive. The drive has a memory. The optical disk has data blocks for recording data, and spare blocks for replacing defect data blocks. The method includes reading a predetermined number of spare blocks into the memory,and while reading a defect data block, checking whether a corresponding replacing spare block is stored in the memory. If so, suspending further reading of the spare block. Otherwise, reading the spare block with a predetermined number of other spare blocks into the memory to reduce further reading of spare blocks.

Abstract: A method comprises utilizing an optical disk drive to manage defects on an optical disk. When a targeted block is defective, the method writes all data in an original packet to an alternative packet without temporarily storing the data in a memory of the optical disk drive, thereby saving memory resources.

Abstract: A method and apparatus for modifying protective page fault, which executes TLB table walk when protective page fault occurs in order to modify protective page fault. The method includes the following steps: (1) detecting the occurrence of protective page fault; (2) executing protective page fault processing mechanism; (3) executing protective page fault service routine; (4) returning to the address where protective page fault occurs; (5) executing TLB table walk to complete modification for protective page fault; and invalidating the TLB entry for protective fault page at step (2).