Patent ID: 7821896
Filing Date: 2010-10-26
Classification: G06F,G11B

Abstract:
1. A recording method for writing data on a write-once disc, the write-once disc having a plurality of physical sectors, the write-once disc including a volume space having a plurality of logical sectors, each of the plurality of logical sectors corresponding to one of the plurality of physical sectors, the recording method comprising the steps of: receiving a write instruction which specifies at least a logical sector in which data is to be written; determining whether the logical sector specified by the write instruction corresponds to a recorded physical sector or an unrecorded physical sector; when it is determined that the logical sector specified by the write instruction corresponds to an unrecorded physical sector, writing the data into the unrecorded physical sector; and when it is determined that the logical sector specified by the write instruction corresponds to a recorded physical sector, writing the data into an unrecorded physical sector other than the recorded physical sector, the unrecorded physical sector being selected from the plurality of physical sectors corresponding to the plurality of logical sectors in the volume space, generating a remapping table including remapping information which remaps an original address of the recorded physical sector to a remapping address of the selected physical sector, and writing the remapping table on the write-once disc; wherein the write instruction is determined based on whether the data to be written is specified for updating a file or creating a new file, in the case of updating a file, metadata of the file is the data to be overwritten; and in the case of creating a new file, metadata of a directory where the new file is stored is the data to be overwritten.