Abstract: According to one embodiment, a disk device includes a housing, magnetic disks in the housing, and a printed circuit board attached to an outer surface of a bottom wall of the housing. The housing includes a base including a bottom wall and a side wall, and at least two base-side positioning portions provided on the bottom wall in a region overlapping the side wall. The printed circuit board includes at least two board-side positioning portions each engaged with the base-side positioning portion. One of the base-side positioning portion and the board-side positioning portion includes a pin extending substantially perpendicular to the bottom wall, and another includes a hole into which the pin is fitted.

Abstract: According to one embodiment, a disk device includes a magnetic disk and a rotary unit. The magnetic disk is rotatable about a first rotation axis extending in the first direction. The rotary unit includes a rotary member, a bearing, and a first filter. The bearing contains a lubricant and rotatably supports the rotary member about a second rotation axis. The first filter captures at least one component contained in the lubricant. The rotary member is provided with a hole and a first communication port. The hole extends along the second rotation axis to accommodate the bearing. The first communication port extends in a direction intersecting the second rotation axis to allow the hole to be in communication with an outside of the rotary member. The first filter is disposed in the first communication port or covers the first communication port.

Abstract: According to one embodiment, a disk device includes a housing including a bottom wall including a protrusion with a first surface, a recording medium arranged in the housing, a printed circuit board attached to the bottom wall, an electronic component mounted on the printed circuit board and including a second surface facing the first surface, and a radiation sheet including a third surface which is contact with the first surface, and a fourth surface which is in contact with the second surface. An area of the first surface is less than an area of the third surface of the radiation sheet, or an area of the second surface is less than an area of the fourth surface of the radiation sheet.

Abstract: According to one embodiment, a disk device includes a housing including a bottom wall including a protrusion with a first surface, a recording medium arranged in the housing, a printed circuit board attached to the bottom wall, an electronic component mounted on the printed circuit board and including a second surface facing the first surface, and a radiation sheet including a third surface which is contact with the first surface, and a fourth surface which is in contact with the second surface. An area of the first surface is less than an area of the third surface of the radiation sheet, or an area of the second surface is less than an area of the fourth surface of the radiation sheet.