Magnetic disk drive

A magnetic disk drive comprising:

• a recording medium that is driven to be rotated;
• a slider disposed to face toward the recording medium;
• and
• an alignment device for aligning the slider with respect to the recording medium, wherein:
• the recording medium has a surface facing toward the slider, and no film made of liquid lubricant is disposed on this surface;
• the slider incorporates:
• a slider main body including a medium facing surface that faces toward the recording medium and a thin-film magnetic head element disposed near the medium facing surface;
• and a protection film for protecting the medium facing surface;
• the protection film is made of a tetrahedral amorphous carbon film;
• and
• the alignment device makes the slider retreat from the surface of the recording medium when the medium is stopped, and makes the slider face toward the surface of the medium when the medium is rotated,
• the magnetic disk drive further comprising a distance control device for controlling a distance between the surface of the recording medium and the thin-film magnetic head element.