In a recording apparatus capable of reducing an airflow and disturbance of the
air flow simultaneously, thereby reducing flutter vibration effectively, a cover
includes first convex sections for reducing a size of a gap between a disk surface
and a cover or between the disk surface arid a housing in an area outside of an
area in which an arm traverses on a disk in comparison with the area in which the
arm traverses, and a second convex section on a part of the first convex sections
to further reduce the size of the gap, and the second convex section is provided
in a range extending with a tan shape thereof in a reverse rotational direction
of said disk from a position distant by 110-170 in the reverse rotational
direction from a straight line connecting the rotational shaft of said disk and
the rotational shaft of said arm.
