Patent ID: 8228772

Claim:
A recording/reproducing apparatus comprising: a spindle motor unit including a spindle on which a flexible recording disk is placed to be rotated so that information data are at least one of recorded onto and reproduced from the recording disk; a stabilizer plate disposed so as to face the recording disk; a rotational speed detection unit configured to detect a rotational speed of the recording disk; an adjustment unit configured to adjust a gap between the recording disk and the stabilizer plate; a determination unit configured to determine an optimum gap to be set to the gap based on the rotational speed that changes as the gap is gradually reduced by the adjustment unit; and, a calculation unit configured to calculate a change rate of the rotational speed that changes as the gap is gradually reduced by the adjustment unit, wherein the determination unit determines the optimum gap based on a gap when the change rate calculated by the calculation unit is equal to or greater than a predetermined value.