The present invention relates to a process for preparing 4-cyclohexyl-2-methyl-2-butanol. The drive motor is characterized in that each pole has a number of magnetic flux influencing groups, each of which has a number of air-filled recesses, which are not assigned to a magnet of a respective magnetic layer for purposes of flux conductance. The connecting pipe has a positioning plate portion disposed to abut against the base wall of the valve seat and formed with a plurality of fastener holes, a guide pipe portion, and an inner hole in spatial communication with the valve space in the valve seat. The invention also relates to a method for the devices and a system comprising the devices. The system is configured in accordance with one embodiment of the invention so that the layout information is stored independent of andor associated with the table data.