Patent ID: 6529461
Filing Date: 2003-03-04
Classification: G11B

Abstract:
A disk apparatus for rotationally driving a disk-shaped recording medium in a plane of rotation defining a normal position with the recording medium supported on a chassis and having a cover extending over said recording medium, said recording medium having a rim, a recordable portion forming a recordable area and an outermost portion containing an annular non-recordable portion adjacent said recordable portion for defining an annular non-recordable radial area, said disk apparatus comprising:a space under said cover in which said recording medium is rotatably supported by a tray when said recording medium is loaded in said disk apparatus; and a contacting member separated from the recording medium when the recording medium is rotating in the normal position, said contacting member protruding from said cover into said space so that said contacting member faces said annular non-recordable radial area contiguous to the rim of said recording medium and extends into said space in an arrangement in juxtaposition with the rim of the recording medium to cause contact to occur between said contacting member and the annular non-recordable radial area in the outermost portion of the recording medium when said recording medium is warped such that the plane of rotation of the recording medium has deviated from the normal position thereby permitting reproduction of data recorded on the recorded medium to take place despite warping of the recording medium.