Device with a floating head having a heater element

A device, comprising:

• a disk rotating drive unit for rotating a magnetic disk;
• a floating head for floating above the rotating magnetic disk, the floating head comprising a slider body and an element unit formed on a trailing edge of the slider body, the slider body having at least one air bearing surface, the element unit having an air bearing surface;
• a support mechanism for supporting the floating head above the magnetic disk;
• and
• a controller for causing contact between the magnetic disk and a protruding portion of the slider body of the floating head,
• wherein the protruding portion and the element unit are physically characterized as exhibiting protrusion upon application of power to a heater element of the element unit, and
• wherein an air bearing surface of the element unit closest to the magnetic disk is configured to be spaced from the magnetic disk when the protruding portion contacts the magnetic disk.