Mitigating organic contaminants within a hard disk drive (HDD) may include introducing an organic solvent into the HDD to dissolve organic contaminants and, therefore, to inhibit such contaminants from fouling operation of the HDD device. Organic solvents such as toluene and/or hexane may be used to dissolve organic contaminants such as hydrocarbons and siloxanes.

A magnetic disk device includes a housing, a disk rotatably provided in the housing, a head provided in the housing and capable of writing and reading information to and from the disk, a voice coil motor provided in the housing and driving the head, and a filter structure provided in the housing and having a porous body including a first porous body with an average pore diameter of 0.4 nm or more and 1.0 nm or less, that is optimized for adsorbing glycol ether.

According to one embodiment, a disk device includes a magnetic disk, a housing, a first filter unit, and a second filter unit. The housing is provided with an internal space and is provided with a first through hole. The first filter unit includes a first case with a first accommodation space which is in communication with the first through hole, a first adsorbent in the first accommodation space, and a first filter. The first accommodation space is in communication with the internal space through the first filter. The second filter unit includes a second case with a second accommodation space which is separated from the first accommodation space, a second adsorbent in the second accommodation space, and a second filter. The second accommodation space is in communication with the internal space through the second filter.

A multi-mode recirculation filter for a hard disk drive (HDD) includes a housing for filtration media, including first ribs having a first distance therebetween and extending from a disk side toward the filtration media, a first plenum on an opposing side of the filtration media behind the first ribs and having a closed back side, and a flow path for receiving flow into the plenum, all enabling pressure reduction on the disk side to maximize the pressure drop across the filter while a head stack assembly (HSA) is parked on a ramp. Housing further includes second ribs downstream of the first ribs, having a second distance therebetween greater than the first distance, and a second plenum behind the second ribs and having an open back side, all enabling increased pressure on the disk side in conjunction with the pressure generated by the HSA while loaded on a disk stack.