Optical disk recording/reproducing apparatus and alternation process method thereof

A disk recording/reproducing apparatus for recording or reproducing information onto an optical disk, with conducting an alternation process upon a defect block within a user data recording area on the optical disk, comprising:

• a disk rotator which rotates the optical disk;
• a slide motor which moves the optical pickup into a radial direction of the optical disk;
• and
• a controller which controls at least the disk rotator and the slide motor upon basis of a signal obtained from the optical pickup,
• wherein, when the optical disk loaded into the apparatus has the alternation areas on an inner periphery, the disk recording/reproducing apparatus conducts the alternation process upon the alternation areas on the inner periphery when the alternation origin is inner than a reference position on the optical disk which is at a position other than a position of an alternation area on the optical disk and conducts the alternation process upon the alternation areas on outer periphery when the alternation origin is outer than the reference position on the optical disk.

An alternation process method for an optical disk, enabling to record data in a defect block within a user data recording area of the disk into an alternation area thereof, comprising the following steps of:

• obtaining a position of an alternation origin on the optical disk, when detecting the defect block within the user data recording area of the disk;
• determining an alternation destination where the data of the alternation origin are recorded therein, during the alternation process, upon basis of a position of the alternation origin on the optical disk and a reference position on the optical disk which is at a position other than a position of an alternation area on the optical disk, when the optical disk has an alternation area on an inner periphery and an outer periphery, being obtained in the step of obtaining;
• and
• conducting the alternation process at the alternation destination, during the alternation process, being determined in the step of determining.