A magnetic disk device according to an embodiment includes a housing in which a base, an inner cover provided with a first through-hole, and an outer cover are combined in this order and hermetically sealed, a magnetic disk that is stored in the housing, a first desiccant unit that is provided at the inner cover to face the base at a position away from the base, and a second desiccant unit that is provided at the outer cover and inserted into an internal space of the housing through the first through-hole provided in the inner cover to face the base at a position away from the base.

According to one embodiment, a magnetic recording device includes a housing having an internal dew point of 5 C. or less, a disk-shaped recording medium provided inside the housing, and a magnetic head provided inside the housing and performing information processing with respect to the recording medium.

According to one embodiment, a disk device includes a housing filled with a low density gas containing oxygen and having a density lower than a density of air, a disk-shaped recording medium provided in the housing to be rotatable, a spindle motor provided in the housing and supporting and rotating the recording medium, and a magnetic head including a heat assist element which heats the recording medium. A surface of magnet of the spindle motor is covered with a shielding film blocking oxygen permeation.

A data storage device may include a sealed inner enclosure, wherein a gaseous environment inside of the sealed inner enclosure differs from a standard air environment; an outer cover situated over and coupled to at least a portion of the sealed inner enclosure; and an environment-controlling substance situated between the sealed inner enclosure and the outer cover. The sealed inner enclosure comprises at least one membrane to allow the environment-controlling substance to affect the gaseous environment inside of the sealed inner enclosure. A method of manufacturing a data storage device may comprise sealing an inner enclosure of the data storage device; applying an outer cover to the data storage device; including an environment-controlling substance between the inner enclosure and the outer cover; and creating a non-standard air environment within the inner enclosure of the data storage device.