According to one embodiment, a disk device includes rotatable magnetic disks, a first actuator assembly rotatably supported on a pivot through a first bearing unit, a second actuator assembly rotatably supported on the pivot through a second bearing unit and provided side by side with the first actuator assembly in an axial direction of the pivot, and a filter unit provided between the magnetic disks and the first and second actuator assemblies. The filter unit includes a holder including a shielding portion facing a boundary portion between the first actuator assembly and the second actuator assembly and a ventilation opening provided at a position spaced apart from the boundary portion in the axial direction, and a filter held by the holder and facing the ventilation opening.

A hard disk drive includes an enclosure housing a first set of magnetic recording media coupled to a first spindle motor, a second set of magnetic recording media coupled to a second spindle motor, and a third set of magnetic recording media coupled to a third spindle motor. The first set of magnetic recording media at least partially overlaps with the second set of magnetic recording media and the third set of magnetic recording media.

An approach to a head gimbal assembly (HAG), such as for a hard disk drive, includes a load beam formed with a deck portion and side rail portions extending from each lateral edge of the deck portion, where each side rail portion includes a crash stop structure extending away from and in the thickness direction of the side rail portion. In a configuration in which the side rails extend at an obtuse angle, z-shaped and reverse z-shaped crash stop structures, opposing angled c-shaped notch structures pairs, or opposing half dome shaped dimple pairs, on back-to-back load beams of a heat-assisted magnetic recording (HAMR) head gimbal assembly can elicit mechanical contact between the crash stops in the event of an operational shock event, thereby avoiding mechanical contact between HAMR chip-on-submount assembly (CoSA) laser modules.

Various illustrative aspects are directed to a data storage device, comprising one or more disks; at least one actuator mechanism configured to position at least a first head proximate to a first disk surface and a second head proximate to a second disk surface; and one or more processing devices. The one or more processing devices are configured to: assign logical tracks to physical tracks of the disk surfaces such that a respective logical track comprises: at least a portion of sectors of a primary physical track, the primary physical track being on the first disk surface; and at least a portion of sectors of a donor physical track, the donor physical track being on the second disk surface. The one or more processing devices are configured to perform, using the first head and the second head, a data access operation with at least one of the logical tracks.

A slide actuator includes a fixed member, a movable member capable of reciprocating in a predetermined direction with respect to the fixed member, a plurality of balls interposed between the fixed member and the movable member and configured to movably support the movable member, a retainer interposed between the respective balls and configured to keep an interval between the respective balls constant and reciprocate in a predetermined stroke range, a wall portion of the fixed member provided in a moving direction of the retainer, and a retainer spring configured to couple the wall portion and the retainer. The retainer spring is disposed to suppress displacement of the retainer in the moving direction. A spring constant of the retainer spring is set to a value for causing sliding friction in the balls and pushing back the retainer in a range in which the retainer moves beyond the predetermined stroke range.

An approach to a reduced-head hard disk drive (HDD) involves an actuator elevator subsystem that includes a ball screw cam assembly with an axial flux permanent magnet (AFPM) motor affixed to a cam screw to drive rotation of the screw, which drives translation of an actuator arm assembly so that a corresponding pair of read-write heads can access different magnetic-recording disks of a multiple-disk stack.

A multi-actuator data storage device such as a hard disk drive may include a lower actuator-pivot-VCM assembly including a lower pivot shaft and a lower motor assembly, an upper actuator-pivot-VCM assembly including an upper pivot shaft and an upper motor assembly, and a central support structure or plate sandwiched between the lower and upper pivot shafts and the lower and upper motor assemblies. The central support structure may be shaped to make contact with the motor assemblies only at discrete assembly locations and to make contact with the pivot shafts at opposing raised pads. Viscoelastic dampers may be adhered to the central support structure at the contact locations to dampen motor vibrational modes and/or to reduce the amplitude of vibration transmitted among the actuator-pivot assemblies. Such an assembly may increase the tilt and in-phase butterfly mode frequencies and decrease the gains of the tilt and coil torsion modes.

Various illustrative aspects are directed to a data storage device, comprising one or more disks; at least one actuator mechanism configured to position at least a first head proximate to a first disk surface and a second head proximate to a second disk surface; and one or more processing devices. The one or more processing devices are configured to: assign logical tracks to physical tracks of the disk surfaces such that a respective logical track comprises: at least a portion of sectors of a primary physical track, the primary physical track being on the first disk surface; and at least a portion of sectors of a donor physical track, the donor physical track being on the second disk surface. The one or more processing devices are configured to perform, using the first head and the second head, a data access operation with at least one of the logical tracks.

According to one embodiment, a disk device comprises a plurality of rotatable magnetic disks, a first actuator assembly, and a second actuator assembly. A slit provided in each of arms of the first actuator assembly is provided to be offset in a direction spaced away from a border plane between actuator assemblies with respect to a center of the arm in its thickness direction. A connection end portion of a wiring member is partially located in the slit, such as to be offset in a direction spaced away from the border plane, and disposed on a wiring board, and joined to the wiring board.

A data storage device is disclosed comprising a first disk surface, a first actuator arm, a first head connected to a distal end of the first actuator arm, an actuator, and a first coupler configured to couple the first actuator arm to the actuator. The first coupler is actuated in order to couple the first actuator arm to the actuator during at least part of a seek interval, and while the first actuator arm is coupled to the actuator, the actuator is moved in order to seek the first head over the first disk surface.