Patent ID: 6990057

Claim:
A disc recording/reproducing device adapted for, with respect to a disc on which a unit cluster having a predetermined number 2N (where N is a positive integer) of sectors as a set is formed and on which a sector address corresponding to each sector and a cluster address corresponding each cluster are modulated in a predetermined manner and recorded in advance, performing recording and reproduction using N sectors as a unit, which is obtained by bisecting the unit cluster, the disc recording/reproducing device comprising: a reproduction unit configured to reproduce the cluster address and the sector address modulated in the predetermined manner and recorded in advance, from the disc; an identifier generation unit configured to generate an identifier that identifies the former N sectors or the latter N sectors obtained by bisecting the unit cluster, as an N-sector recording unit used for recording data; a blocking and recording unit configured to block inputted data into plural blocks and record the blocked data within the N-sector recording unit; an address generation unit configured to generate an address corresponding to the plural blocks each that are formed in the N-sector recording unit; and a conversion unit configured to convert the cluster address and the sector address reproduced by the reproduction unit to an address unit including the identifier generated by the identifier generation unit, the address generated by the address generation unit and a recording block address generated on the basis of the cluster address, wherein the address unit obtained by conversion by the conversion unit is recorded for the plural blocks each, by the recording means.