Jason C Olson

US Patent 7385781 Multi-arm disk drive system having interleaved read/write operations and method of controlling same

US Patent 7394606 Information storage device and write control circuit

US Patent 7397628 Two degree of freedom position control method, two degree of freedom position control device, and medium storage device

US Patent 7400467 Methods and apparatus for managing write inhibit in response to a predictive metric

US Patent 7408734 Preventing damage to the heads and media in a removable cartridge and disk drive

US Patent 7408735 Data tracking method and apparatus for disk-based data storage

US Patent 7414805 Method for intelligent tape drive subsystem control and monitoring in a tape library

US Patent 7417821 Information recording apparatus

US Patent 7420763 Disk drive control circuit and method

US Patent 7420765 Seek control apparatus, seek control method and storage apparatus

US Patent 7423838 Servo control method and apparatus suitable for the same

US Patent 7426086 Off track write protection for data storage device

US Patent 7430090 Storage apparatus, control method, control device, and program which preheats head

US Patent 7430091 Method and apparatus for improving the performance of a disk drive

US Patent 7430093 Seek control method of hard disk drive, recording medium storing method and hard disk drive adopting method

US Patent 7436618 Circuit and method for protecting emergency head-retract capacitor in a hard disk drive

US Patent 7436620 Method for selecting an electrical power to be applied to a head-based flying height actuator

US Patent 7440216 Rotary piezoelectric microactuator with an optimum suspension arrangement

US Patent 7440225 Disk drive employing pivot friction compensation

US Patent 7443628 Storage apparatus, spindle motor control method, and program

US Patent 7446970 Magnetic head assembly, magnetic disk drive and posture control method for magnetic head slider

US Patent 7450330 Library apparatus, control method and control program thereof, and information processing apparatus

US Patent 7450333 Electrostatic fly-height control

US Patent 7450334 Disk drive adjusting predictive caching based on temperature of voice coil motor

US Patent 7453660 Shock feed forward adaptive filters

US Patent 7457065 Systems and methods for hard disk drive optimization and manufacturing

US Patent 7460325 Information recording/reproduction apparatus having hard disk device incorporated therein

US Patent 7460326 Propagation self servo write system and method for storage devices employing sector-servo scheme

US Patent 7466506 Magnetic recording disk drive with head positioning servo control system for disk surfaces with identical servo patterns

US Patent 7468854 Storage apparatus, control method, control device, and program which can control flying height of head accurate

US Patent 7468856 Estimation and control of head fly height

US Patent 7468859 Voice coil motor effective resistance determination

US Patent 7471486 Disk drive estimating seek time according to a seek profile and a variance group

US Patent 7474495 Piezoelectric micro-actuator for magnetic tape read/write head

US Patent 7474496 Micro actuator DC gain calibration scheme for HDD dual-stage actuator systems

US Patent 7477464 Manufacturing method of recording medium, electric/magnetic field copy master and electric/magnetic field copying device

US Patent 7477467 Preamp circuit including a loopback mode for data storage

US Patent 7477473 Servo positioning adjustment

US Patent 7480111 Data library device

US Patent 7480112 Disk drive apparatus having shock adaptive filters

US Patent 7483227 Detecting a thermal asperity condition of a disk drive head responsive to data value transitions

US Patent 7483228 Hard disk drive with reduced power consumption, related data processing apparatus, and I/O method

US Patent 7483230 Write-current control chip and magnetic disk drive using the same

US Patent 7483350 Recording medium for storing linking type information and method of processing defective area using the same

US Patent 7486458 Magnetic disk drive with diagnosis of error-correcting retries

US Patent 7486465 Magnetic spacing control method for magnetic head, read/write circuit, and magnetic disk device using same

US Patent 7486471 Methods and apparatus for constraining transducer velocity based on disk rotational latency while seeking in a disk drive

US Patent 7489466 Enabling intermittent contact recording on-demand

US Patent 7489469 Embedded runout correction based on written-in runout measurement

US Patent 7489470 Magnetic recording apparatus

US Patent 7489471 Bias calculation, bias compensation, and bias table editing methods for HDD, recording media storing computer programs for executing the same, and HDD using the same

US Patent 7489472 High-order hybrid actuator controller

US Patent 7492543 Control device, control method, and storage apparatus for controlling read head and write head clearance

US Patent 7492546 Providing pre-determined servo position correction values for use during disk drive initialization

US Patent 7495858 Information processing apparatus having built-in hard disk drive and head retraction processing method of built-in hard disk drive

US Patent 7502190 Information recording/reproduction apparatus having hard disk device incorporated therein

US Patent 7502191 Method and apparatus reducing off track head motion due to disk vibration in a hard disk drive through the head gimbal assembly

US Patent 7508619 Magnetic head and magnetic disc drive

US Patent 7508620 Disk apparatus, information processing system, and information providing apparatus

US Patent 7515370 Recorder and cassette containing recording medium

US Patent 7518819 Disk drive rewriting servo sectors by writing and servoing off of temporary servo data written in data sectors

US Patent 7518820 Detecting fly height of a head over a storage medium

US Patent 7522360 Flying height measurement apparatus and method therefor

US Patent 7522362 Amplitude servo pattern, magnetic recording medium and the manufacturing method, patterned magnetic transfer master substrate used in the manufacturing method, and magnetic recording/reproducing apparatus

US Patent 7522368 Differential voice coil motor control

US Patent 7525745 Magnetic disk drive apparatus and method of controlling the same

US Patent 7525754 Repeated runout compensation using scaled position signals

US Patent 7529049 Method and system for testing of magnetic disks using F-BER

US Patent 7529058 Track pitch examination method of storage apparatus, program, and storage apparatus

US Patent 7535666 Disk-type storage medium driving apparatus and disk-type storage medium rotation speed control method

US Patent 7538961 Using inductance to measure writer spacing in perpendicular magnetic recording

US Patent 7538967 Method and apparatus for estimating a position of a head in a disk drive

US Patent 7542226 Algorithm decoupling altitude effect from temperature/humidity sensor

US Patent 7545596 System and method for WORM magnetic recording

US Patent 7548390 HDD write control method and apparatus

US Patent 7548393 HDD track following control apparatus and method

US Patent 7551384 Systems and methods for calibrating a read/write channel of a hard disk drive

US Patent 7551386 Head gimbal assembly with flying height controller, disk drive unit using the same, and flying height adjusting method and system thereof

US Patent 7551387 Servo writing with offset compensation for prewritten reference

US Patent 7554759 Mechanism for isolating marginal recording to media or recording apparatus

US Patent 7558013 Programming a sensitivity level into an inertial sensor based on a proxy of whether a system is in transit

US Patent 7561358 Multi-register read channel optimization

US Patent 7561364 Method and apparatus for controlling disc drive using counter-electromotive force

US Patent 7564637 Storage media having areas for storing data for correcting servo information errors

US Patent 7567403 Bi-directional servo track writing to minimize sidewall writing at high skew angles

US Patent 7567405 Servo information recording device and servo information recording method

US Patent 7567406 Method of writing pattern on magnetic disk and device therefor

US Patent 7570445 Adaptively adjusting seek function control parameters based on off-track write events

US Patent 7570451 Servo architecture for high areal density data storage

US Patent 7570452 Two degree of freedom position control method, two degree of freedom position control device, and medium storage device

US Patent 7576939 Discontinuous mode back EMF measurement

US Patent 7580213 Apparatus and method to minimize amplitude variations associated with media/head response characteristics in servo writing of perpendicular magnetic recording

US Patent 7580218 Magnetic head tester using magnetic disk with pre-written servo

US Patent 7580223 Magnetic recording media, substrate for magnetic recording media, and magnetic recording apparatus

US Patent 7583457 RAM disk boot of optical media image

US Patent 7583464 Apparatus and method compensating mechanical tolerance of brushless direct current motor and related disk drive

US Patent 7583465 Disk drive adaptive resonance compensation method and apparatus

US Patent 7583470 Disk drive writing wedge RRO data along a sinusoidal path to compensate for reader/writer offset

US Patent 7586704 Method and apparatus for improving threshold detection of servo data in the presence of signal asymmetry

US Patent 7586710 Control of transducer to tape spacing

US Patent 7589928 Magnetic recording device including a thermal proximity sensor

US Patent 7589930 Zone based repeated runout error compensation

US Patent 7595948 Thermal asperity detection for perpendicular magnetic recording

US Patent 7595950 Robust data storage techniques for two-sided data storage tape

US Patent 7595951 Head-specific standby modes for disk drive preamplifiers and the like

US Patent 7595952 Magnetic head evaluation apparatus and method for manufacturing magnetic disk drive using the same

US Patent 7595957 Servo gain adjustment based on bias force error

US Patent 7599139 Disk drive having a high performance access mode and a lower performance archive mode

US Patent 7602569 Magnetic tape and magnetic tape cartridge

US Patent 7602570 Motor power controller for a disk drive, disk drive comprising a motor power controller and method for controlling the motor power of a disk drive

US Patent 7602573 Device and method for adjusting distance between magnetic head and data storage medium

US Patent 7602580 Commutational ramp loading apparatus and method

US Patent 7605993 Write current boosted head amplifier

US Patent 7605995 Servo writer, signal output control method and manufacturing method of magnetic tape using the signal output control method

US Patent 7609470 Information storage device, write current adjustment method for the information storage device, and write control circuit

US Patent 7609474 Seek control method, seek control device and disk device

US Patent 7612959 Method for correcting added and lost bits in a hard disk drive using error correction codes

US Patent 7612961 Magnetic recording disk and disk drive with patterned phase-type servo fields for read/write head positioning

US Patent 7616394 Storage apparatus, control method and control apparatus

US Patent 7616397 Disk drive and disk drive control method

US Patent RE40975 Head suspension with resonance feedback transducer

US Patent 7619845 Method and apparatus for controlling disc drive using counter-electromotive force

US Patent 7619847 Head controller, storage device, and head controlling method

US Patent 7619848 Method of searching to find a servo pattern corresponding to a servo pattern copy process

US Patent 7623311 Recording media, recording and reproducing apparatus, and method for recording and reproducing

US Patent 7623316 Circuit and method for protecting emergency head-retract capacitor in a hard disk drive

US Patent 7630154 Hard disk inspection method and system

US Patent 7630157 Method of selecting an audio source

US Patent 7633696 Fly height calibration for read/write heads

US Patent 7633697 Magnetic disk drive, servo writer, self-servo writer and methods for use therewith

US Patent 7633700 Method and system for contiguously appending data onto media in a tape drive system

US Patent 7633701 Method and system for increasing recording format reliability for limited media space in a tape drive system

US Patent 7633704 Regulating tuning rate of adaptive filter coefficients for feed-forward disturbance rejection in a servo control loop

US Patent 7636214 Structure, optical device, magnetic device, magnetic recording medium and manufacturing method thereof

US Patent 7636219 Magnetic recording and reproducing apparatus and magnetic recording and reproducing method

US Patent 7639442 Methods and apparatus to perform hard-disk drive head proximity detection in a preamplifier

US Patent 7643235 Synchronization for data communication

US Patent 7643240 Adjusting a fly-height in hard disk drives

US Patent 7643241 Methods calculating RRO and RRO compensation value in HDD

US Patent 7646555 Testing storage system electronics using loopback

US Patent 7646556 Systems and methods for detecting flaws on a storage disk

US Patent 7646557 Methods and apparatus for generating a clock signal, for writing servo tracks, and for characterising timing errors in a servo track writer

US Patent 7646561 Method of writing pattern in disk, method of following track on disk, and apparatus for writing pattern in disk

US Patent 7649704 Disk drive deferring refresh based on environmental conditions

US Patent 7652837 Data erasure apparatus and data erasure method

US Patent 7652838 Library device

US Patent 7652839 Magnetic recording disk with identical servo patterns formed on each disk surface by single master template and disk drive using the disk

US Patent 7656598 Method and apparatus for setting storage capacity of recording media

US Patent 7656599 Control apparatus, storage apparatus, and computer product

US Patent 7656603 Pre-programming of a preamplifier in a disk drive to improve servo-writing characteristics

US Patent 7656605 Method for repeatable run-out compensation

US Patent 7660059 Method of controlling write strength of HDD and recording medium having recorded thereon program suitable for same

US Patent 7660065 Disk positioning information writing method and apparatus, information recording/reproduction apparatus and recording medium

US Patent 7660067 Disk drive initializing a coil temperature estimation algorithm using a resistance of the coil estimated during a load operation

US Patent 7660069 Technique for signal and transducer alignment in a tape drive

US Patent 7663829 Performance test method of head gimbal assembly with precise positioning micro-actuator

US Patent 7667910 Magnetic disk drive, servo writer, self-servo writer and methods for use therewith

US Patent 7667915 Disk drive having a head amplifier for perpendicular magnetic recording

US Patent 7667917 Method and apparatus for controlling write parameter according to voltage variation

US Patent 7672076 Servo writer and servo writing method

US Patent 7675699 Patterned-media magnetic recording disk and disk drive with data zones having nondata regions near the zone boundaries

US Patent 7675701 Method and apparatus for detecting servo timing marks in a magnetic disk system

US Patent 7675702 Reduced convolution for repetitive disturbance rejection

US Patent 7675704 Magnetoresistive head preamplifier circuit with programmable input impedance

US Patent 7679850 Position determination using circular shift codes

US Patent 7684138 Magnetic disk drive, method for registering defective sector, and method for controlling flying height

US Patent 7684142 Disk device, positioning control circuit and information processing apparatus using same

US Patent 7688535 Extracting position information using user data

US Patent 7688540 Disk drive selecting TPI profile by estimating head geometry

US Patent 7692888 Apparatus, system, and method for detection of fly height margin using controlled excitation of air bearing mode

US Patent 7697224 Storing AD sampled data of read/write channel into ECC SRAM

US Patent 7697226 Control apparatus, storage apparatus, and computer product

US Patent 7697230 Tape drive position control

US Patent 7701656 Method and apparatus for permanent magnet erasure of magnetic storage media

US Patent 7701657 High-density recording method for hard disk drives and a pre-amplifier circuit suitable for use with same

US Patent 7701660 Shock cancellation system

US Patent 7706092 Null servo pattern for bit-patterned media

US Patent 7710674 Signal processing apparatus, signal processing method and storage system

US Patent 7710677 Thermally assisted magnetic head

US Patent 7710683 Multi-arm disk drive system having interleaved read/write operations and method of controlling same

US Patent 7715135 Methods, circuits, apparatus, and systems for read channel synchronization and/or fly height measurement

US Patent 7715136 Hard disk drive preamplifier with reduced pin count

US Patent 7715137 Servo patterns for patterned media

US Patent 7715141 Shield biasing for MR devices

US Patent 7719781 Method and apparatus for phase-shift null-burst-pattern

US Patent 7724457 Method and system for time-shift based rotational vibration sensing in disk drives

US Patent 7729071 Readback apparatus and readback method

US Patent 7729072 Open write-head-cable test method and detector

US Patent 7729073 Magnetic recording disk and disk drive with amplitude-type servo fields having patterned servo islands for read/write head positioning

US Patent 7729076 Angularly spaced spiral erase for media

US Patent 7733592 Methods for multi-channel data detection phase locked loop frequency error combination

US Patent 7746588 Tape-based data storage system capable of reading and/or writing multiple error correctable sets of data

US Patent 7746589 Bit patterned medium, reading head for reading data recorded on bit patterned medium, and hard disk drive for recording/reading data on/from bit patterned medium

US Patent 7751139 Circuits, systems, and methods for calibration of bias across a magneto-resistive sensor

US Patent 7751141 Management of data cartridges in multiple-cartridge cells in an automated data storage library

US Patent 7760458 Disk drive adjusting head bias during servo synchronization to compensate for over/under sensitivity

US Patent 7764453 Method for interfacing non-volatile medium control system components

US Patent 7768728 Detecting head/disk contact using timing jitter

US Patent 7773326 Methods for multi-channel data detection phase locked loop error combination

US Patent 7773327 Multi-channel data detection phase locked loop frequency error combination logic

US Patent 7773328 Synchronous repeatable run out field detection with high efficiency field format

US Patent 7777979 Magnetic disk device testing method and testing device

US Patent 7777980 Multi-channel data detection phase locked loop error combination logic

US Patent 7787205 Detecting and correcting insertion and deletion of bits for bit patterned media storage systems

US Patent 7787208 Bit patterned medium having super-track, method of tracking track of bit patterned medium, head appropriate for bit patterned medium, and information recording/reproducing apparatus including bit patterned medium head

US Patent 7791829 Apparatus for assisting write operation using high frequency magnetic field in disk drive

US Patent 7791830 Signal processing circuit and magnetic storage apparatus

US Patent 7796354 Method and apparatus for controlling data rate of a tape drive

US Patent 7804655 Thermally assisted magnetic head

US Patent 7808734 Monitoring a fly height of a magnetic transducer

US Patent 7813066 Magnetic recording and reproduction method, recording apparatus, reproduction apparatus and magnetic recording medium

US Patent 7813072 Method and apparatus for improving performance of hard disk drive at low temperature

US Patent 7817362 Inspection apparatus and inspection method of magnetic disk or magnetic head

US Patent 7817363 Single-pass defect detection for hard-disk drive systems

US Patent 7821730 Systems and methods for compensating baseline wandering in perpendicular magnetic recording

US Patent 7826160 Signal reproducing method, magnetic head and magnetic recording and reproducing apparatus

US Patent 7826161 Object based storage device with storage medium having varying media characteristics

US Patent 7830631 Controlling an overshoot amplitude level based on a recording data pattern in a magnetic disk drive

US Patent 7835094 Embedded track information for patterned media

US Patent 7835096 Disk-drive write head fault detection

US Patent 7835099 Method and system for error checking in a bit-patterned media

US Patent 7835105 Propagation self servo write system and method for storage devices employing sector-servo scheme

US Patent 7835106 Method of controlling the position of a read/write head and apparatus for testing a read/write head

US Patent 7839592 Magnetic head driving circuit with protection function

US Patent 7839593 Magneto-resistive biasing methods and systems

US Patent 7839595 Feed forward compensation for fly height control in a disk drive

US Patent 7843660 Disk drive adjusting erasure window based on a number of non-read data sectors during a retry operation

US Patent 7848037 Media defect removal in disk drive head testing

US Patent 7848043 Circuits, systems, and methods for low noise biasing of magnetic-resistance sensors

US Patent 7852583 Disk drive device, altitude determination method therefore and method for determining characteristic of head element portion

US Patent 7852584 Head IC, read circuit, and media storage device

US Patent 7852585 Preamp circuit including a loopback mode for data storage devices

US Patent 7852586 Device and method for scanning data stored on a recording medium

US Patent 7852592 Spiral slope approximation of spiral patterns written to a disk of a disk drive

US Patent 7852722 Optical disk apparatus and playback signal processing method

US Patent 7855849 Methods and apparatus for temperature compensation for hard disk drive write overshoot current

US Patent 7859778 Deterministic phase mismatch correction in servo position estimation systems

US Patent 7864465 Hard disk drive with reduced power consumption, related data processing apparatus, and I/O method

US Patent 7864466 Signal processing apparatus and a signal storage system

US Patent 7864470 Patterned media with spacings adjusted by a skew function

US Patent 7864471 Converting timing errors into symbol errors to handle write mis-synchronization in bit-patterened media recording systems

US Patent 7864477 Circuits, architectures, apparatuses, systems, algorithms and methods and software for automatic gain calibration of a burst signal stream

US Patent 7864653 Probe storage device

US Patent 7869153 Self servo write tune feature for preamps

US Patent 7869312 Calibration based DC coupled analog front end for optical storage system

US Patent 7880998 Multiple writing process for magnetic bit-patterned media

US Patent 7881164 Sync mark detection with polarity uncertainty

US Patent 7885024 Oscillation test for off track write

US Patent 7885025 Generating PES using readback signal distortion

US Patent 7885026 Magnetic recording medium and method of fabricating the same

US Patent 7885030 Methods and systems for delay compensation in global PLL-based timing recovery loops

US Patent 7885173 Write-once information recording medium and disk apparatus

US Patent 7889451 Magnetic recording apparatus and clock signal generating method

US Patent 7894150 Error compensation using a reserve track

US Patent 7898756 Disk drive adapting target values of a sequence detector relative to bit error rate of the sequence detector

US Patent 7898757 Hard disk drive with divided data sectors and hard disk drive controller for controlling the same

US Patent 7898758 Systems and methods for storing data to magnetic tape having damaged areas

US Patent 7898759 Thermally assisted magnetic recording head and magnetic recording apparatus

US Patent 7898760 Magnetic spacing and tape characteristic compensation system and method

US Patent 7903360 Recovering servo information from a synchronous servo channel

US Patent 7903368 Tape cartridge having tape media with longitudinally shifted servo pattern for increased sampling rate

US Patent 7907360 Setting writer boundaries for multiple writers

US Patent 7907361 Triple track test for side erase band width and side erase amplitude loss of a recording head

US Patent 7907362 Magnetic disk controller and method

US Patent 7911727 Controlling motion of storage media

US Patent 7916416 Disk drive comprising slanted line servo bursts having a varying tilt angle

US Patent 7920347 Shroud for head gimbal assembly testing

US Patent 7924519 Eccentricity determination for a disk

US Patent 7924520 Method and apparatus for determining position of a storage medium

US Patent 7924523 Frequency domain approach for efficient computation of fixed-point equalization targets

US Patent 7924524 System and method for generating an amplitude error signal in a magnetic tape recording channel

US Patent 7929234 Disk drive prioritizing in-the-field defect scanning based on number of write operations in each of a plurality of defect zones

US Patent 7929236 Apparatus and method for writing and reading data to and from tape medium

US Patent 7929240 Systems and methods for adaptive MRA compensation

US Patent 7929388 Recording medium for storing linking type information and method of processing defective area using the same

US Patent 7933089 Track-adapted data clocking

US Patent 7933092 Method and apparatus for estimating a position of a head in a disk drive

US Patent 7936529 Testing apparatus for magnetic recording medium and testing method for magnetic recording medium

US Patent 7940489 Method and apparatus for repeatable run-out compensation

US Patent 7944641 Overshoot duration range selection in a hard disk drive

US Patent 7948699 Systems and methods for equalizer optimization in a storage access retry

US Patent 7965460 Jerk detection for data storage device

US Patent 7965462 Storing partial data sets to magnetic tape

US Patent 7965463 Recording multiple codeword sets during latency period

US Patent 7965464 Heat-assisted magnetic recording with shaped magnetic and thermal fields

US Patent 7965466 Equalization and detection

US Patent 7965468 Magnetic racetrack memory device including write-back loop

US Patent 7969674 Data transfer assembly performance characteristics testing

US Patent 7969680 Magnetic tape on which a servo pattern is formed

US Patent 7974030 Systems and methods for dibit correction

US Patent 7974036 Time-shifted bits for write synchronization correction

US Patent 7978427 Device for embedding information into data

US Patent 7982986 Signal reproducing method, magnetic head and magnetic recording and reproducing apparatus

US Patent 7982990 Digital techniques to decode signals extracted from computer-readable storage media

US Patent 7982992 Dual gain control for magnetic data storage system

US Patent 7982996 Perpendicular magnetic recording write head and system with improved spin torque oscillator for microwave-assisted magnetic recording

US Patent 7982997 Method for an equalizer computation in a media system using a data set separator sequence

US Patent 7990639 Mobile event data recorder with multiple orientation vibration isolation

US Patent 7990642 Systems and methods for storage channel testing

US Patent 7990648 Disk drive margining read channel using predictable disturbance samples generated as a function of a written pattern

US Patent 7995299 Magnetic recording medium evaluation apparatus and evaluation method

US Patent 7995303 Overhead calculation in writing synchronized data to magnetic tape

US Patent 8000046 Storage device, processor or storage device, and computer program product for providing parameter adjustment during read/write operations

US Patent 8000048 Magnetic recording disk and disk drive with track identification using phase-type servo patterns

US Patent 8000052 Cartridge refresh and verify

US Patent 8009376 Disk drive device and method for determining data track format of the disk drive device