Disc drive for disc flutter improvement in high driving speed and method

摘要

The present invention provides an optical information recording/reproducing apparatus, which comprises a tray and a chassis. The chassis comprises two side walls, and at least one raising rib is set on at least one of the two side walls. While the optical information recording/reproducing apparatus accommodates the optical information recording medium in a vertical manner, the raising rib comes into contact with the edge of the optical information recording medium for raising the optical information recording medium. The shape of the raising rib is designed to match the arc-shaped edge of the accommodation recess surface to reduce the disturbance of the air current while the optical information recording/reproducing apparatus rotates the optical information recording medium.