An approach to a reduced-head hard disk drive (HDD) involves a load/unload (LUL) ramp subsystem that includes a ramp assembly that includes a rotatable latch link configured for mechanical interaction with a head-stack assembly (HSA) and a LUL ramp coupled with the latch link, configured such that in response to a force applied to the latch link by the HSA, the latch link rotates which disengages a magnetic latch and drives the LUL ramp to rotate into an operational state disengaged from any recording disk of a multiple-disk stack. The subsystem may further include a motor configured to drive rotation of a lead screw to which the ramp assembly is attached, to drive vertical translation of the ramp assembly, thereby providing for loading the vertically-translatable HSA onto and off of each of the disks of the disk stack.

A multi-slope load/unload ramp for a hard disk drive includes an inner first portion having a non-horizontal first slope and an adjacent outer second portion having a different non-horizontal second slope. The first slope may be steeper than the second slope, and the ramp may further include a third portion adjacent to the second portion and also having a third slope steeper than the second slope, with the ramp configured for positioning the first and second portions to overlap the disk while the third segment may be in part outside the disk. The second slope may be steeper than the first slope, with the ramp configured for positioning the first portion to overlap the disk while the second portion may be in part outside of the disk. Hence, any slider rebound from the steeper portions would occur outside of the disk and avoid a slider-disk crash.

A multi-slope load/unload ramp for a hard disk drive includes an inner first portion having a non-horizontal first slope and an adjacent outer second portion having a different non-horizontal second slope. The first slope may be steeper than the second slope, and the ramp may further include a third portion adjacent to the second portion and also having a third slope steeper than the second slope, with the ramp configured for positioning the first and second portions to overlap the disk while the third segment may be in part outside the disk. The second slope may be steeper than the first slope, with the ramp configured for positioning the first portion to overlap the disk while the second portion may be in part outside of the disk. Hence, any slider rebound from the steeper portions would occur outside of the disk and avoid a slider-disk crash.

A data storage device is disclosed comprising a first disk comprising a first disk surface, a second disk comprising a second disk surface, an elevator actuator configured to actuate a head along an axial dimension relative to the first and second disks, a radial actuator configured to actuate the head radially over the first disk surface or the second disk surface, and a position sensor configured to generate a sinusoidal sensor signal representing a position of the head along the axial dimension. A crashstop_offset along the axial dimension is measured from a crashstop position of the elevator actuator to a zero crossing of the sinusoidal sensor signal.

An approach to a reduced-head hard disk drive (HDD) involves a load/unload (LUL) ramp subsystem that includes a ramp assembly that includes a rotatable latch link configured for mechanical interaction with a head-stack assembly (HSA) and a LUL ramp coupled with the latch link, configured such that in response to a force applied to the latch link by the HSA, the latch link rotates which disengages a magnetic latch and drives the LUL ramp to rotate into an operational state disengaged from any recording disk of a multiple-disk stack. The subsystem may further include a motor configured to drive rotation of a lead screw to which the ramp assembly is attached, to drive vertical translation of the ramp assembly, thereby providing for loading the vertically-translatable HSA onto and off of each of the disks of the disk stack.

In general, according to one embodiment, a disk device includes a magnetic disk, a magnetic head, a suspension, a ramp, a housing, and a screw. The suspension holds the magnetic head and moves to an unload position. The ramp includes an attachment tab with a through hole. The ramp holds the suspension at the unload position. The housing has a support surface with a screw hole to support the attachment tab. The screw includes a screw head, a screw shaft, and a first contact surface. The screw shaft extends from the screw head in a first direction and is fitted into the screw hole through the through hole. The first contact surface is located on the screw head, tapers in the first direction, and contacts the attachment tab. The screw holds the attachment tab in-between the support surface and the first contact surface.

A disk apparatus includes a base including a bottom wall and a sidewall disposed along a peripheral portion of the bottom wall, a cover including a ceiling plate and a side plate disposed along a periphery of the ceiling plate, the ceiling plate being fixed to the sidewall and the side plate facing an outer surface of the sidewall, and a rotatable recording medium disposed between the cover and the bottom wall. The sidewall of the base includes a first portion adjacent to the recording medium and a protruding portion that protrudes from the first portion outward and away from the recording medium, and at least a portion of a sidewall of the protruding portion faces an opening formed in the side plate.

A disk apparatus includes a base including a bottom wall and a sidewall disposed along a peripheral portion of the bottom wall, a cover including a ceiling plate and a side plate disposed along a periphery of the ceiling plate, the ceiling plate being fixed to the sidewall and the side plate facing an outer surface of the sidewall, and a rotatable recording medium disposed between the cover and the bottom wall. The sidewall of the base includes a first portion adjacent to the recording medium and a protruding portion that protrudes from the first portion outward and away from the recording medium, and at least a portion of a sidewall of the protruding portion faces an opening formed in the side plate.

A disk apparatus includes a base including a bottom wall and a sidewall disposed along a peripheral portion of the bottom wall, a cover including a ceiling plate and a side plate disposed along a periphery of the ceiling plate, the ceiling plate being fixed to the sidewall and the side plate facing an outer surface of the sidewall, and a rotatable recording medium disposed between the cover and the bottom wall. The sidewall of the base includes a first portion adjacent to the recording medium and a protruding portion that protrudes from the first portion outward and away from the recording medium, and at least a portion of a sidewall of the protruding portion faces an opening formed in the side plate.

A disk apparatus includes a base including a bottom wall and a sidewall disposed along a peripheral portion of the bottom wall, a cover including a ceiling plate and a side plate disposed along a periphery of the ceiling plate, the ceiling plate being fixed to the sidewall and the side plate facing an outer surface of the sidewall, and a rotatable recording medium disposed between the cover and the bottom wall. The sidewall of the base includes a first portion adjacent to the recording medium and a protruding portion that protrudes from the first portion outward and away from the recording medium, and at least a portion of a sidewall of the protruding portion faces an opening formed in the side plate.