Information recording and reproducing apparatus having processor and information recording and reproducing method.

摘要

An information recording and reproducing apparatus for recording and/or reproducing data onto/from a recording medium such as magnetic disk, magnetooptic disk, or the like by irradiating a laser beam emitted from a light source such as a semiconductor laser onto a desired track of the recording medium through an optical system, wherein the apparatus includes a single processor for executing an input/output control of data for the apparatus and a servo process of the laser beam by interrupting the servo process between the input/output control at every predetermined period. The processor switches a precision of the servo process in accordance with a situation such as a change in operating mode.