Source : Free On-Line Dictionary of Computing

constant linear velocity
     
         (CLV) A {disk} driving scheme in which the {linear
        velocity} of the disk is kept constant.  This requires that
        the {angular velocity} of the disk be larger when the reading
        or writing tracks closer to the axis.  The advantage of this
        technique is that the read/write speed is constant.  However,
        as mechanical stability puts an upper limit on the angular
        velocity (and not the linear velocity) using the same linear
        velocity throughout, i.e., using less then the maximal angular
        velocity at outer tracks means that the full potential of the
        drive is not used.
     
        (1998-03-27)