For the KdV-Burgers equation on a nite interval the development of a regular prole starting from a constant one under a periodic perturbation on the bound- ary is studied. The equation describes a medium which is both dissipative and dispersive. For an appropriate combination of dispersion and dissipation the asymptotic prole looks like a periodical chain of shock fronts with a decreasing amplitude (similarly to the Burgers equation case). But due to dispersion each such front is followed by increasing oscillation leading to the next shock - like the ninth wave in rough seas. The development of such a prole is preceded by an initial shock of a constant height.