Patent ID: 7308637

Claim:
A data recording/reproducing device for a disk recording medium wherein concentric tracks are formed and each of the tracks is divided into a plurality of sectors, comprising: a seeking part for seeking a target track; a data accessing part for making makes access on the target track; and an error correcting part for generating error correcting codes for correcting errors in data, and for correcting the errors in data based on the error correcting codes; wherein the error correcting part sets a first error correcting code unit for a predetermined data amount unit, sets a second error correcting code unit for a plurality of the first error correcting code units, forms error correcting blocks including a plurality of the first error correcting code units and the second error correcting code units added thereto, and generates the error correcting blocks such that, when a head is moved to a track on the disk recording medium by the seeking part, a sector having the second error correcting code recorded therein is the first sector to be read by the data accessing part.