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US20110157739 |
NEGATIVE BIASING A SLIDER WITH RESPECT TO A DISK TO REDUCE SLIDER WEAR AND PROVIDE BURNISH RATE CONTROL
In a method for negatively biasing a slider with respect to a disk to reduce slider wear and provide burnish rate control a negative bias voltage is generated between the slider and the disk... |
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US20090040650 |
PROVIDING REMOVABLE STORAGE MANAGEMENT SERVICES USING REMOVABLE STORAGE ERROR INFORMATION
Provided are a method, system, and article of manufacture for providing removable storage management services using removable storage error information. Read/write error information is obtained... |
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US20120140355 |
Reliability-Aware Disk Power Management
A token value is maintained based on an allowable number of low power transitions of a hard disk drive without adversely affecting reliability, compared to an actual number of low power... |
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US20110157740 |
FLY-HEIGHT MANAGEMENT IN A HARD DISK DRIVE (HDD)
A hard disk drive (HDD) including a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media. The first RTD is proximate an air... |
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US20120162812 |
IMPACT ENERGY DISPERSING CRASH STOP FOR A HARD DISK DRIVE
A hard disk drive including a crash stop is disclosed. The crash stop includes a shaft and a resilient member covering a portion of the shaft. In addition, the resilient member includes a right... |
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US20120188664 |
RADIAL POSITION SEEK TUNING FOR ACOUSTIC PERFORMANCE
Examples of the present invention relate to reduction in acoustic noise by tuning seek characteristics of a servo controller, depending on a radial position of a head relative to a disk. The servo... |
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US20120105999 |
INTEGRATED TOUCH-DOWN PAD AND TOUCH-DOWN SENSOR
In one general embodiment, a magnetic head includes a touch-down pad, comprising at least one shielding element positioned between a leading edge of a main magnetic pole and a trailing edge of a... |
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US20140168813 |
MASS BALANCED FLEXURE GIMBAL FOR HEAD GIMBAL ASSEMBLY SWAY MODE CONTROL
Approaches to a mass balanced flexure gimbal assembly for controlling the sway mode of the loadbeam portion of the suspension of a head gimbal assembly (HGA) of a hard-disk drive (HDD). The sway... |
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US20140192436 |
METHOD AND SYSTEM FOR HARD DISK DRIVE THROUGHPUT OPTIMIZATION USING POSITION ERROR SIGNALING
Systems and methods are provided for throughput optimization of a hard disk drive (HDD) using position error signaling (PES) that includes determining a PES for a HDD mounted in a chassis based on... |
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US20150103433 |
HARD DISK DRIVE HAVING MULTIPLE DISK STACKS ON A ROTATABLE PLATFORM
A lower cost per unit of storage hard disk drive (HDD) includes multiple disk stacks fixed to a carousel, and at least one head stack assembly (HSA) for accessing portions of the... |
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US20130250446 |
Spacing Fluctuation Compensation
A method to compensate for spacing variations between a dynamic fly height (DFH) controlled read/write head and a rotating disk surface. Using a HDI sensor or equivalent indicator of touchdowns, a... |
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US20130033780 |
Base for motor and hard disk drive including the same
There is provided a base for a motor, the base including: a base body formed of a steel plate through a pressing process; and an outer wall part defining an exterior of the base body, in which the... |
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US20130094104 |
Head DFH protrusion shape calibration by HDI sensor
Dynamic fly height (DFH) controlled read/write heads using multiple heaters have their heater powers set within a range of ratios that allows minimum clearances to be set between the read-gap and... |
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US20130335852 |
In-Situ Contact Potential Measurement in Hard-Disk Drives
Approaches are provided for a hard-disk drive (HDD) and a method for measuring the contact potential between head and disk interfaces within a hard-disk drive. In one example, a voltage bias is... |
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US20120075741 |
Arm coil assembly, arm flexible cable assembly and disk drive unit with the same
An arm coil assembly includes a drive arm having at least two grounding pins formed on a mounting region thereof and a voice coil fixed on the tailing end of the drive arm for controlling the... |
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US20130163110 |
BALANCED EMBEDDED CONTACT SENSOR WITH LOW NOISE ARCHITECTURE
Approaches for a hard-disk drive (HDD) having a balanced resistive temperature detector (RTD). A HDD includes a head slider comprising a single RTD. A read/write IC comprises a balance resistor... |
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US20130003221 |
FLY HEIGHT CONTROL USING WRITE VOLTAGE ADJUSTMENTS
Apparatus and method for controlling a fly height of a transducer adjacent a recording surface by adjusting a write voltage magnitude. In accordance with some embodiments, a write voltage with an... |
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US20130301158 |
DISK DRIVE COMPRISING EXTENDED RANGE HEAD PROXIMITY SENSOR
A disk drive is disclosed comprising a head actuated over a disk, and a fly height transducer operable to generate a fly height signal for the head. The disk drive further comprises control... |
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US20120087035 |
Systems and Methods for Variable Compensated Fly Height Measurement
Various embodiments of the present invention provide systems and methods for determining fly height. |
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US20130163114 |
BASE ASSEMBLY FOR MOTOR AND HARD DISK DRIVE INCLUDING THE SAME
There is provided a base assembly for a motor, including: a base for a motor; a magnet mounted in the base to provide a driving force to a magnetic head; and a magnet insertion part having the... |
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US20100002331 |
ADAPTIVE SYNCHRONOUS RECTIFICATION OF BRUSHLESS DC MOTOR BACK-EMF
A disk drive power system is described. The system is operable such that during power interruption, the system taps electric power by rectifying the back-EMF generated across each winding of a DC... |
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US20140177094 |
SPINDLE MOTOR AND HARD DISK DRIVE INCLUDING THE SAME
There is provided a spindle motor including a sleeve rotatably supporting a shaft, a rotor coupled to an upper end of the shaft and rotating together with the shaft, a stopper part coupled to a... |
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US20130293984 |
DISK DRIVE WITH HEAD THERMAL FLY-HEIGHT ACTUATOR AND CONTROLLER FOR COMPENSATION OF WRITE HEAD EXPANSION
The invention is a disk drive with a thermal fly-height actuator and a fly-height controller that compensates for exponential write pole protrusion during a write operation. The fly-height... |
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US20140126081 |
DISK DRIVE PREDICTING SPINDLE MOTOR FAILURE BY EVALUATING CURRENT DRAW RELATIVE TO TEMPERATURE
A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor operable to rotate the disk. A baseline relationship is generated between a baseline current draw of the... |
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US20130003220 |
Hard Disk Drive and Method for Controlling Flying Height of Magnetic Head Thereof
There is disclosed a hard disk drive and a method of controlling a flying height of a magnetic head of the hard disk drive. A method of controlling a flying height of the magnetic head in a hard... |
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US20150170691 |
QUASI-STATICALLY TILTED HEAD HAVING OFFSET READER/WRITER TRANSDUCER PAIRS
Aspects of the present invention relates generally to apparatuses with transducer arrays having offset transducers. Various embodiments are particularly suited to tilting for tape dimensional... |
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US20070121252 |
Actuator and hard disk drive having the same
An actuator of a hard disk drive includes a swing arm having an axis or rotation, a suspension extending from a distal end of the swing arm, a read/write head mounted on the suspension, a coil... |
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US20110216438 |
READER-WRITER OFFSET CORRECTION FOR A DISK DRIVE
A servo wedge on a recording medium for a disk drive includes a gray-code field that stores a micro-jog correction factor for a data track. The micro-jog correction factor compensates for the... |
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US20130271868 |
BASE FOR MOTOR AND HARD DISK DRIVE INCLUDING THE SAME
A base for a motor, the base including: a base body formed by performing press processing on a steel plate, a base material; an outer wall part defining an outer edge of the base body and formed... |
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US20130114160 |
BASE FOR MOTOR AND HARD DISK DRIVE INCLUDING THE SAME
There is provided a base for a motor, the base including: a base body formed by performing press processing on a steel plate, a base material; an outer wall part defining an outer edge of the base... |
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US20130170071 |
DETECTING TOUCH DOWN AND/OR ASSESSING QUALITY IN A HARD DISK DRIVE
This application discloses a hard disk drive and a control circuit that are configured to determine touchdown by determining the SAGC for a track, removing the repeatable component of the SAGC to... |
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US20110299190 |
DETECTING TOUCH DOWN AND/OR ASSESSING QUALITY IN A HARD DISK DRIVE
This application discloses a hard disk drive and a control circuit that are configured to determine touchdown by determining the SAGC for a track, removing the repeatable component of the SAGC to... |
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US20130163113 |
BASE FOR MOTOR AND HARD DISK DRIVE INCLUDING THE SAME
There are provided a base for a motor and a hard disk drive including the same. The base for a motor includes a base body having a disk disposed thereon; and a fixing part formed on the base body... |
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US20130308223 |
EXCITATION OF AIRBEARING OSCILLATION WITH TAR NEARFIELD DEVICE FOR TOUCHDOWN DETECTION
In one general embodiment, a magnetic head includes a slider having a media-facing surface; and a device coupled to the slider and being selectively extendible for selectively contacting a... |
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US20140177090 |
MEDIA TOPOGRAPHY DRIVEN FLYING HEIGHT MODULATION SENSING USING EMBEDDED CONTACT SENSOR
Approaches for a flying height control scheme in a hard-disk drive (HDD) device. The flying height control scheme utilizes an embedded contact sensor (ECS) to characterize the topography of a... |
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US20050068656 |
Disk drive including an auxiliary pulse width modulation (PWM) control circuit and related methods
A disk drive may include a housing, and a rotatable data storage disk and associated disk drive motor carried by the housing for rotating the rotatable data storage disk. The disk drive may also... |
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US20130194691 |
MAGNETIC DISK DRIVE AND METHOD FOR CONTROLLING THE SAME
According to one embodiment, there is provided a magnetic disk device including an acceleration feedforward module, an eccentricity correction module, and a control module. The acceleration... |
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US20140300988 |
Hard Disk Drive Bypass Channel Having A Close-Sided Voice Coil Motor
Approaches to improving head positioning accuracy in a hard disk drive, by suppressing airflow disturbances that would otherwise cause unwanted component vibration, include a voice coil motor... |
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US20140293472 |
READ HEAD SENSOR WITH A TANTALUM OXIDE REFILL LAYER
In one embodiment, a method includes masking a sensor stack with a first mask, milling exposed regions of the sensor stack for defining a back edge of the sensor stack, forming a tantalum oxide... |
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US20110158072 |
METHOD OF DETECTING APPROXIMATE TOUCH-DOWN, METHOD OF ADJUSTING HEAD FLYING HEIGHT USING THE DETECTED APPROXIMATE TOUCH-DOWN, AND DISK DRIVE
A method and apparatus to control a flying height of a head in a disk drive by detecting a flying state of the head just before it touches down to a disk. The method includes detecting approximate... |
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US20080291563 |
Torsion compensation coil for voice coil motor of disk drive device, and method of making the same
Certain example embodiments relate to torsion compensation coils that cooperate with primary coils in voice coil motors of disk drive devices, and methods of making the same. In certain example... |
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US20140078613 |
MOTOR DRIVE DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC APPARATUS
A motor drive device has: a power supply line to which a power supply voltage is applied; a ground line to which a ground voltage is applied; and a first motor driver that, when the power supply... |
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US20130194692 |
MAGNETIC DISK DRIVE AND METHOD FOR SERVO PREAMBLE LENGTH ADJUSTMENT APPLIED TO THE SAME
According to one embodiment, a magnetic disk drive includes a disk and a controller. The disk includes a plurality of zones each having a plurality of tracks. The disk is formatted such that a... |
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US20110235208 |
METHOD OF DETECTING THE TOUCH-DOWN OF A HEAD, METHOD OF ADJUSTING A HEAD FLYING HEIGHT USING THE METHOD OF DETECTING THE TOUCH-DOWN OF THE HEAD, AND DISK DRIVE USING THE METHOD OF DETECTING THE TOUCH-DOWN OF THE HEAD
A method of detecting a touch-down of a head in a disk drive, a method of adjusting a head flying height by using the method of detecting a touch-down of a head, and a disk drive using the method... |
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US20120212854 |
SHUNT FOR MAGNETORESISTIVE TRANSDUCER HEADS FOR ELECTROSTATIC DISCHARGE PROTECTION
A magnetoresistive transducer head assembly includes a reader element, a writer element and a high impedance shunt electrically connecting the reader element and the writer element. The high... |
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US20140247517 |
REGULATING DISTRIBUTION OF POWER IN A HARD DISK DRIVE FOLLOWING A POWER LOSS
Applicant has recognized and appreciated the desirability of powering an actuator using power drawn from one or both of an energy storage device and a spindle motor. In some embodiments, following... |
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US20090116135 |
HEAD POSITIONING ASSEMBLY
A head positioning assembly having a first carriage assembly, a second carriage assembly, and an actuator. The second carriage assembly has a head and is coupled to the first carriage assembly by... |
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US20120206832 |
TAPE HEAD ACTUATOR
An assembly according to one embodiment includes a first module and a second module each having multiple transducers, wherein the first module is movable relative to the second module; a tape... |
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US20140293476 |
SPINDLE MOTOR AND HARD DISK DRIVE INCLUDING THE SAME
There are provided a spindle motor and a hard disk drive including the same. The spindle motor includes a base member including a mounting part, and a hydrodynamic bearing assembly having a... |
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US20130188276 |
DISK DRIVE AND METHOD FOR ARRANGING AND MANAGING CALIBRATION AREA IN DISK DRIVE
According to one embodiment, there is provided a disk drive. In the disk drive, a calibration module calibrates a write condition using a first area in a sequential access area on a disk to which... |