Patent ID: 7916593
Filing Date: 2011-03-29
Classification: G11B

Abstract:
1. An optical disk device comprising: a rotational drive portion for driving an optical disk to rotate; and a controller for controlling said rotational drive portion: wherein said controller performs the functions of: performing processing for retrying to access said optical disk by the optical pickup unit when access failure occurs, judging whether or not the access failure is caused by a defect of said optical disk, judging if the access failure repeatedly occurs in a predetermined range of tracks on said optical disk, when said controller judges that access failure is caused by the defect of said optical disk when the optical pickup unit attempts to access a designated address on the optical disk, said controller performs processing for changing an access destination to an address separated from the address that caused a failed access attempt, by a distance that is equal to a width of a first address, and determining whether access to the optical disk is possible at a predetermined reference position of said optical disk and if information relating to the designated address is read by a read processor of the optical disk device, and