226 of the slot 222 terminates adjacent to the
top side of the planar desiccant 60. The lid 32, when in place, cooperates with the slot 222 to form a relatively long serpentine path for ambient air to enter the interior space 44 of the housing 22. Preferably, the serpentine path also has a
relatively small diameter. The length of the serpentine path together with its relatively small diameter inhibits the passage of water vapor from the ambient atmosphere into the interior space 44 of the housing 22. Furthermore, by locating the
serpentine path in series with the planar desiccant 60, any water vapor or condensed moisture from the ambient atmosphere that has migrated from the first end 224 to the second end 226 of the slot 222 can be adsorbedrotary actuator 30 to position the transducers 28a, 28b, at a specific track on the hard disk 24. The second level is recessed from the first level by an
amount determined by the height of a voice coil assembly portion of the rotary actuator 30. The second level is defined, at least in part, by a second well 74 and a third well 76. The third well 76 is located in the area bounded by the spin motor
mounting hole 68, the first well 70, and the first and second reinforcing ribs 72a, 72b. The third level is recessed from the second level by an amount determined by the distance from the mounting flange 118 the spin motor to the lower surface of the
hard disk 24. The third level is