Method and apparatus for dynamically adjusting the ramp speed for loading and/or unloading sliders in a hard disk drive
AssigneeSamsung Electronics Co., Ltd.
InventorChao Yuan Chen
Life of this patent
Estimating the term…
Abstract
A Load-UnLoad (LUL) hard disk drive rotating its disks with ramp speeds when loading and/or unloading its sliders from its ramp based upon at least one atmospheric condition (AC) within the hard disk drive. Embodiments include load and unload ramp speeds that differ for a single AC, load ramp speeds that differ for differing AC, and/or unload ramp speeds that differ for differing AC. Also a method of operating such hard disk drive and its implementation within an embedded circuit.
Claims15
A disk drive comprising:
- a disk base;
- a spindle motor mounted on said disk base;
- at least one disk rotatably coupled to said spindle motor to create at least one rotating disk surface when said spindle motor rotates said disk at ramp speeds selected based upon at least one atmospheric condition;
- an actuator assembly pivotably mounted to said disk base by an actuator pivot, comprising at least one head gimbal assembly for positioning a read-write head in a slider near said rotating disk surface;
- a ramp mounted to a member of the group consisting of said disk base and said spindle motor, wherein said ramp speeds are used in at least one member of the ramp operation group consisting of a loading operation of said slider onto said ramp and an unloading operation of said slider from said ramp;
- and
- an embedded circuit controlling a rotation control signal to stimulate said spindle motor to rotate said disk at said ramp speeds for performing said members of said ramp operation group.
A method of operating a disk drive, comprising the steps of:
- rotating each disk included in said disk drive with at least two ramp speeds based upon at least one atmospheric condition while performing at least one member of the ramp operation group consisting of a loading operation of a slider onto a ramp and an unloading operation of said slider from said ramp;
- wherein said ramp speeds differ;
- wherein each of said atmospheric conditions includes at least one instance of at least one member of the group consisting of a temperature, a pressure and a humidity.
A control circuit for controlling a rotation control signal to stimulate a spindle motor to rotate a disk at ramp speeds selected based upon a signal received by said circuit providing data regarding at least one atmospheric condition.
Dependencies are inferred from the claim text.