The invention is directed to arrangements of tapered data storage tape guides which can improve the guiding of data storage tape. Various other methods, systems, and computer-readable media are also disclosed. The upper top cloth has an area of projection larger than the area of the central opening of the lower top cloth. , button for activating the dispensing and aspiration of the sample. Also, the idle power consumed by the uncore area while the core area is in deep power saving states may be reduced by varying the reference voltage VR and the VP provided to the uncore area. The adjustable air supply valve has the effect of independently supplying air to the different sections.