A system comprises a first storage system including a first storage controller, which receives inputoutput commands from host computers and provides first storage volumes to the host computers; and a second storage system including a second storage controller which receives inputoutput commands from host computers and provides second storage volumes to the host computers. The supporting ring supports an inspection glass which is recessed in the form of a cup in the direction of the interior of the drum. An interconnecting structure is configured to span the gap and to electrically couple the first chip and the second chip. Similar to single vane meat pumps, the disclosed twin vane pump is capable of handling large meat chunks while causing relatively little damage to the chunks.