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Match Document Document Title
7453665 Method of adjusting magnetic head of magnetic tape recording and reproducing apparatus and magnetic tape recording and reproducing apparatus  
Processing wherein a measurement signal and an erasure signal are recorded on adjacent tracks of a recordable tape 10 by one recording head HWi of n (i=1 to n) recording heads is effected on n...
7453662 Estimating residual temperature for flying height adjustment of read/write heads  
Methods of estimating a flying height of a read/write head include determining an idle period of the head since a last selection of the head as a working head, estimating the residual temperature...
7453661 Servo writing a disk drive with a controlled overlap near the middle diameter of the disk  
A method of servo writing a disk of a disk drive is disclosed, wherein the disk drive comprising the disk and a head actuated over the disk. Servo sectors are written to define servo tracks from a...
7450336 Method for improved repeatable run out learning in a disk drive  
A method is disclosed for determining fundamental-frequency repeatable runout (1FRRO) coefficients in a disk drive. The disk drive includes a transducer head, a rotating magnetic disk having a...
7450334 Disk drive adjusting predictive caching based on temperature of voice coil motor  
A disk drive is disclosed including a disk having a plurality of tracks, wherein each track comprises a plurality of data sectors. The disk drive further comprises a head coupled to a distal end of...
7450333 Electrostatic fly-height control  
A mechanism for maintaining a constant fly-height of a slider comprises a capacitive fly-height change sensor and an electrostatic fly-height controller. The capacitive fly-height change sensor is...
7450332 Free-fall detection device and free-fall protection system for a portable electronic apparatus  
In an integrated free-fall detection device for a portable apparatus an acceleration sensor generates acceleration signals correlated to the components of the acceleration of the portable apparatus...
7446970 Magnetic head assembly, magnetic disk drive and posture control method for magnetic head slider  
To realize stable reading/writing of data by making a positioning control of a magnetic head slider highly accurate. There are provided a magnetic head assembly including: a magnetic head slider...
7446967 Method of measuring head characteristics of a data storage device, and data storage device  
Embodiments of the invention relate to measuring characteristics of a head with an actuator put in a state of being pushed against a crush stop. In one embodiment, with a head placed on an...
7443625 Magnetic disk drive  
In the present invention, by making the width of the write element larger than the track pitch and securing a write magnetic field strong enough to reverse the magnetization of the magnetic layer,...
7440224 Disk drive servo  
A disk drive includes a disk having a first servo burst written with advancing phase as a radial distance on the disk increases, and a second servo burst written with decreasing phase as a radial...
7440220 Method for defining a touch-down power for head having a flying height actuator  
A novel method for defining a touch-down power for a head that has a head-based flying height actuator is disclosed and claimed. A linear relationship between power and spacing is derived by...
7440219 Non-contact measurement of slider fly height by electrostatic force  
In a system and method for a non-contact measurement of the fly height of a slider above a magnetic data storage medium using electrostatic force, a slider with a read/write head flies over a...
7440218 Charge remover for magnetic disk  
A loading/unloading type magnetic disk unit includes a magnetic disk that is rotated or driven by a motor, and a head slider bearing a magnetic head and being movable above the magnetic disk owing...
7440217 On the fly write head flyheight detector  
Embodiments of the invention measure a flying height of a recording head. According to one embodiment, in a magnetic circuit comprising a recording head and a magnetic disk, a magnetic resistance...
7440216 Rotary piezoelectric microactuator with an optimum suspension arrangement  
The invention relates to a microactuator comprising a movable structure having a symmetric axis about which the movable structure are divided into two parts which can produce the same movement but...
7436620 Method for selecting an electrical power to be applied to a head-based flying height actuator  
A novel method of selecting an electrical power, to be applied to a subject head-based flying height actuator during operation of a disk drive, is disclosed and claimed. A touch-down power for each...
7436619 Head floating amount control method and unit, storage apparatus and computer-readable program  
A head floating amount control unit control a head floating amount of each of a plurality of heads respectively having a heater, with respect to a recording medium, by detecting contact between...
7436618 Circuit and method for protecting emergency head-retract capacitor in a hard disk drive  
A protection circuit for a capacitor comprises a voltage pump that selectively charges the capacitor. A current source selectively charges the capacitor. A controller compares a charging voltage to...
7436617 Controller, state estimator and methods for use therewith  
A controller is disclosed that can be used in controlling a drive device of a disk drive, or other systems, in the presence of sinusoidal disturbances. The controller includes a calibration module...
7436616 Current pulsing for unloading  
A method and device for parking heads of a disk drive device involves receiving a command to immediately park the heads. A first pulse is provided to a voice coil motor causing the heads to move...
7436614 Data storage device and data storage device control  
Embodiments of the invention provide a data storage device and its control method that are capable of minimizing the possibility of head deterioration while maintaining the minimum required...
7433147 Position control device, disk device, and position control method  
The present invention provides a disk device, a control device, and a positioning control method with which positioning in a target position can be performed without expending time on a seek...
7433144 Dynamic system control method  
Techniques are provided herein for reducing vibrations in various modes of a dynamic system. One such technique comprises incorporating vibration limiting and sensitivity constraints into a partial...
7430091 Method and apparatus for improving the performance of a disk drive  
An implementation of a disk drive with improved efficiency where a read head supported by a first positioning component is provided and a write head supported by a second positioning component is...
7430090 Storage apparatus, control method, control device, and program which preheats head  
Upon correction, a preheat sector number measurement unit measures a preheat sector number which corresponds to transition time from when electric power distribution to and heating of the heater by...
7430089 Data storage device and write processing method for data storage device  
A data storage device executes sector guarantee processing at an unexpected power supply disconnection. The sector guarantee processing can be accurately performed even if the fluctuation of power...
7430088 Retracting method of hard disk drive, hard disk drive adopting the method, and recording medium storing program for executing the method  
A retracting method of compensating for a time for parking and unloading with an additional floating force obtained by additionally operating a spindle motor for a predetermined period after a...
7430083 Virtual head fly profile measurement  
A method for monitoring a data storage medium is provided in which a virtual head fly profile is measured. In addition, a data storage device for implementing the monitoring method is provided.
7429857 Magnetic head and disk X-Y test assembly with optimized arrangement for skew angle  
A magnetic head and disk tester comprises a base, a spindle for rotationally supporting a magnetic disk, a carriage for supporting a magnetic head support which carries a magnetic head with a...
7428119 Magnetic disk drive with head retraction control  
Embodiments of the invention improve utility of a magnetic disk drive in which a head is retracted if the magnetic disk drive is in a dropping state. In one embodiment, an HDC/MPU provided in a...
7428118 LTM compensation methods and systems for magnetic servo writing  
Methods and systems are provided for writing a magnetic servo track. In one example, a system includes a head assembly having first and second write elements, and a controller. The controller...
7428117 Servo signal inspecting device and method for inspecting servo signal  
A servo signal inspection device and a method for detecting servo signal are provided which can measure and evaluate quality of the servo signal on a magnetic tape with a sufficient resolution. The...
7426090 Storage device, control device, control method, and program  
A heater for changing a projection distance protrusion value by thermal expansion accompanying electric-power-distributed heating is embedded in a head having a reading element and a recording...
7426089 Disk drive with heater for slider and control method thereof  
Embodiments of the invention allow a heater to reduce the clearance between a head element section and the magnetic section while reducing the risk of collision between the head element section and...
7423832 Controlling head heating based on upcoming data sector write pattern  
A disk drive includes a rotatable data storage disk, a head, a heater element, and a controller. The disk includes a plurality of data sectors between servo spokes. The head is configured to fly on...
7423831 Utilization of the acceleration zone in ammonite servo writing  
A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes accelerating a head to a constant velocity across a disk. The disk being defined as...
7423830 Detecting head/disk contact in a disk drive using a calibration parameter  
A disk drive having a heater element on the read/write head includes control circuitry to prevent head/disk contact by limiting power to the heater element. As the power to the heater element...
7423829 Circuit for flying height on demand  
A hard disk drive with a control circuit that controls a heating element in a head of the drive. The heating element is driven by a voltage. The control circuit varies the voltage during read and...
7420762 Head slap detecting device, storage device, head slap detecting method, and computer product  
A head-slap detecting device detects a head slap. The head slap causes a storage medium to be slapped by at least one storage-medium driving unit that performs at least one of reproduction and...
7420761 Control apparatus, storage device, and head retraction controlling method  
A falling-time measuring unit measures time for which a fall of a storage device is consecutively detected by a fall detecting sensor. A head-position detecting unit detects a position of the head...
7420760 Method and apparatus reducing flying height drop in a hard disk drive under humid conditions  
A slider with an intake heater near front edge heating air passing between air bearing surface and rotating disk surface to reduce change in flying height caused by water condensation. Method of...
7417820 Head support mechanism, magnetic head assembly, and magnetic disk drive apparatus  
A head support mechanism includes a suspension for supporting a magnetic head slider with a thin-film magnetic head, having a slider mounting section on which the magnetic head slider is fixed, and...
7414808 Apparatus and method for adaptively adjusting recording density of a disk utilizing a trapezoidal shaped magnetic head  
An apparatus and method is provided for storing and retrieving information from a disk in which a TPI (tracks per inch) profile of a disk drive including a write pole having a trapezoidal...
7411760 System and method for correcting for head tilt in HDD  
Tilt between a head stack and its associated disk stack in a hard disk drive (HDD) is measured by determining the deviation of a target head from its expected position (based on the position of the...
7411759 Detection and measurement of position error signal linearity in timing based servo patterns using differential nonlinearity  
Systems, computer implemented methodology, and computer readable media for measuring position error signal differential nonlinearity in timing based servo patterns. A set of two or more reading...
7411758 Disk drive servo control using spirals  
A servo control system includes a peak detection module that detects peak times of spiral signals generated by reading spirals prewritten on a magnetic medium. The servo control system includes a...
7411752 Head vibration detection device and method  
A disc drive including a transducer supported on the head suspension assembly to induce a transducer signal in response to head vibration. The transducer signal is level detected to output a level...
7408734 Preventing damage to the heads and media in a removable cartridge and disk drive  
A disk drive uses the integration of the instantaneous velocities of the heads to estimate the distance the heads travel while latched. The disk drive can then determine if the heads are properly...
7408732 Shock resistant, high reliability rotating magnetic storage device and method  
An information recording method in a rotating storage apparatus comprising a rotating recording medium for recording information, a head for performing at least a write operation onto the rotating...
Matches 1 - 50 out of 2258 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >