INFORMATION RECORDING AND PLAYBACK DEVICE

摘要

An information recording and playback device includes a recording and playback unit, and a controller. The controller divides a recording area of an optical disk into a first recording area which is at an inner circumference side, and a second recording area which is at an outer circumference side. The controller controls the recording and playback unit such that the unit records or plays back data in the first recording area at a first speed, and records or plays back data in the second recording area at a second speed slower than the first speed. The predetermined radius is set to a boundary between an area in which a control residual exceeds a predetermined reference value when servo control related to focusing and tracking is performed on the recording area of the optical disk, and an area in which the control residual does not exceed the predetermined reference value.

主权项

1. An information recording and playback device which records or plays back data in or from an optical disk, the device comprising:
a recording and playback unit which records or plays back the data in or from the optical disk by using laser light; and a controller which controls the recording and playback unit, wherein the controller divides a recording area of the optical disk into a first recording area which is at an inner circumference side based on, as a boundary, a predetermined radius in a radius direction of the optical disk, and a second recording area which is at an outer circumference side, and manages the recording area, and controls the recording and playback unit such that the recording and playback unit records or plays back data in the first recording area at a first speed, and records or plays back data in the second recording area at a second speed slower than the first speed, and the predetermined radius is set to a boundary between an area in which a control residual exceeds a predetermined reference value when servo control related to focusing and tracking is performed on the recording area of the optical disk, and an area in which the control residual does not exceed the predetermined reference value.