The preferred embodiments described herein provide a method for making a write-once memory device read compatible with a write-many file system. The switching element can be selectively moved perpendicularly to the longitudinal direction thereof towards one or the other opposite contact element by two adjusting elements that are located on both sides next to the switching element. Measurements are made for the ambient temperature of at least one of the two temperature controlled zones, and the temperature differential between the two temperature controlled zones. The radio frequency switch activates a first antenna of the plurality of antennas as an active antenna in response to an antenna control signal sent from the controller. An air inlet extends through the enclosure and is connected to the blower to direct air to the blower in a direction substantially perpendicular to the first longitudinal face andor the second longitudinal face.