Patent ID: 7813244
Filing Date: 2010-10-12
Classification: G06F,G11B

Abstract:
1. A write-once recording medium on which a sequential recording is performed, comprising: a data area; a disc management information area; disc management information for managing the write-once recording medium recorded in the disc management information area; a plurality of physical addresses assigned to the data area; a plurality of logical addresses assigned to a user data area; at least one sequential recording area assigned to the user data area; the disc management information includes sequential recording area management information for managing the at least one sequential recording area; the sequential recording area management information includes a last recording address, the last recorded address being a physical address indicating a location at which data is last recorded in a sequential recording area; the disc management information includes a replacement management information list including at least one piece of replacement management information; the at least one piece of replacement management information maps a physical address indicating an original location in the user data area to another physical address indicating a replacing location; a primary logical address-physical address mapping, which indicates a corresponding relationship between the plurality of logical addresses and the plurality of physical addresses, is determined based on the disc management information; by a recording instruction that includes a logical address indicating a location on which data is to be recorded, the logical address included in the recording instruction is changed into physical addresses, in accordance with the primary logical address-physical address mapping, one sequential recording area is determined among the at least one sequential recording area, based on the physical address corresponding to the logical address included in the recoding instruction and sequential recording area management information; a physical address indicating a location at which data can be recorded next in the determined sequential recording area as a next writable address, based on the last recording address in the determined sequential recording area; when the physical address corresponding to the logical address included in the recording instruction is smaller than the next recordable address, the data is recorded at a specific location in the user data area, the specific location being a location other than a location indicated by the physical address corresponding to the logical address included in the recording instruction; whether or not replacement management information including a replacement physical address is found in the replacement management information list, the replacement physical address matching the physical address corresponding to the logical address included in the recording instruction; when the replacement management information is not found, as a first pseudo-overwrite recording for a location indicated by the physical address corresponding to the logical address included in the recording instruction, new replacement management information, which maps the physical address corresponding to the logical address included in the recording instruction on the physical address that indicates the specific location, is generated: the replacement management information list is updated by adding the new replacement management information to the replacement management information list; when the replacement management information is found, as a second or more pseudo-overwrite recording for a location indicated by the physical address corresponding to the logical address included in the recording instruction, the replacement management information list is updated by changing a replacement address of the found replacement management information into a physical address indicating the specific location: new disc management information that includes the updated replacement management information list and the last recording address updated by the recording of the data; and the new disc management information is recorded in the disc management information area.