Producing a magnetic disk device

A method for producing a magnetic disk device comprising:

• injecting replacement gas into a hermetically-sealed enclosure by means of an injection nozzle while suctioning gas from inside of the hermetically-sealed enclosure by means of a suction nozzle in such a way that the gas pressure inside of the enclosure does not fall below the vapor pressure of the organic compounds present inside of the enclosure,
• wherein the hermetically-sealed enclosure houses within a magnetic disk for storing data, a magnetic head for writing/reading the data, and an actuator for moving the magnetic head relative to the magnetic disk, and wherein a gas injection port and a gas expulsion port are formed in the hermetically-sealed enclosure and provide communication between the inside and outside, and filters are disposed at the gas injection port and gas expulsion port, respectively, wherein an injection nozzle is disposed at the gas injection port and a suction nozzle is disposed at the gas expulsion port.