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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8189285 | Method and system for automatic time base adjustment for disk drive servo controllers A servo controller includes a first device that determines an adjusted servo-to-servo skew value. A servo field timer increments a timer value between consecutive servo fields, receives the adjusted servo-to-servo skew value, and adjusts an incremented timer value b... | 05/29/2012 |
| 8059359 | Data sector phase correction method and disk drive apparatus using the same A method to correct a phase of a data sector due to rotational slip of a disk includes measuring a difference in the phase of a servo sector between a plurality of disks and adjusting an amount of cylinder skew of a logical data sector between the plurality of disks... | 11/15/2011 |
| 7961421 | Servo band identification and initial skew estimation in drives having flangeless rollers and systems thereof According to one embodiment, a system includes a plurality of synchronous servo channels with each synchronous servo channel including a servo reader included in a magnetic head, and logic for applying a plurality of first control signals to a skew-following loop. E... | 06/14/2011 |
| 7957088 | Track compensation and skew compensation for drives having flangeless rollers and systems thereof According to one embodiment, a system includes a plurality of synchronous servo channels, where each channel receives a signal from a servo reader of a magnetic head. The system also includes logic for estimating a tape velocity, logic for determining a first and se... | 06/07/2011 |
| 7948706 | Apparatus and method to adjust the orientation of a read head to correct for dynamic skew A method to adjust the orientation of a read head comprising a first read element and a second read element, wherein the first read element and the second read element are separated by a distance, wherein the method moves a sequential information storage medium adja... | 05/24/2011 |
| 7688540 | Disk drive selecting TPI profile by estimating head geometry A disk drive is disclosed comprising a disk and a head actuated radially over the disk. The head is positioned over a first radial location, and a first data tracks per inch (TPI—1) is selected for data tracks recorded near the first radial locat... | 03/30/2010 |
| 7663834 | Data sector phase correction method and disk drive apparatus using the same A method to correct a phase of a data sector due to rotational slip of a disk includes measuring a difference in the phase of a servo sector between a plurality of disks and adjusting an amount of cylinder skew of a logical data sector between the plurality of disks... | 02/16/2010 |
| 7567405 | Servo information recording device and servo information recording method There is provided a servo information recording device having a simple structure, being implementable in lower cost, and capable of writing servo information with high reliability and a servo information recording method. The servo information recording device inclu... | 07/28/2009 |
| 7538966 | Read/write head azimuth determination via servo band signal information The present invention, in particular embodiments, provides methods, apparatuses and systems directed to calculating azimuth of a read/write head via signals transduced from a servo read pattern of a tape. The signals are utilized to calculate azimuth of the read/wri... | 05/26/2009 |
| 7508619 | Magnetic head and magnetic disc drive Embodiments in accordance with present invention provide a magnetic head and a magnetic disc drive capable of preventing a side erase while providing excellent recording characteristics. According to one embodiment, in order to prevent the side erase in an increased... | 03/24/2009 |
| 7492545 | Method and system for automatic time base adjustment for disk drive servo controllers A system and method for a servo controller (SC) used in an embedded disk controller for adjusting stored servo skew values based on measured skew values is provided. The system includes, a servo timing controller, wherein the servo timing controller includes a first... | 02/17/2009 |
| 7436621 | Azimuth compensation using combination bump pes detection An example embodiment provides for an apparatus and method, for use in a tape drive system, that supplies tape azimuth error information transduced from servo read elements that are located on differing bumps of a magnetic read/write head. Non-azimuth error informat... | 10/14/2008 |
| 7420758 | Head system, recording and reproduction system, and magnetic recording method Disclosed is a head system including a plurality of recording heads for azimuth recording. The system includes a first recording head having a plurality of magnetic gaps having a first azimuth angle, and a second recording head having a plurality of magnetic gaps ha... | 09/02/2008 |
| 7379257 | Magnetic disk drive A magnetic disk drive includes an actuator arm, a suspension fixed to a tip end of the actuator arm, and a head slider having at least two electromagnetic transducers mounted at a tip end of the suspension. The head slider has a first electromagnetic transducer incl... | 05/27/2008 |
| 7359160 | Magnetic head device and linear tape drive including a multi-element magnetic head chip and twin bimodal actuators In general, the invention provides a magnetic head device and linear tape drive that increase the resonant frequency and the range of a servo system. In particular, the invention provides a magnetic head device comprising a magnetic head chip with multiple magnetic ... | 04/15/2008 |
| 7352525 | Hard disk drive fly height adjust method and apparatus during error recovery Data recovery, following a read error in a hard disk drive, is provided which includes an adjustment of fly height. In one embodiment, some re-reads are performed by both adjusting the fly height and the off-track positioning of the read head. In one embodiment, two... | 04/01/2008 |
| 7342738 | Positioning head assembly for data storage system with multiple degrees of freedom The Invention Provides a Positioning System for a Linear Data Storage Medium, Such as magnetic tape or other data storage medium in which data is stored on parallel data tracks that extend along a length of the medium. The invention makes use of multiple actuators t... | 03/11/2008 |
| 7342748 | System with matrix array of write heads and matrix array of magnetoresistive (MR) read heads The invention provides a system comprising a non-linear array of magnetoresistive (MR) heads arranged in a two-dimensional matrix for reading information stored on magnetic media. The non-linear array of MR heads may comprise a planar array formed by a plurality of ... | 03/11/2008 |
| 7301724 | Transducing head Determining an error in position of at least two heads coupled to a piezoelectric material, and changing a potential applied to a piezoelectric material to reduce the error in position of the at least two heads. ... | 11/27/2007 |
| 7301716 | Stepped time based servo pattern and head The present invention relates to a method of synthesizing the slanted transitions in a time based servo pattern using servo write gaps that are perpendicular to the tape motion. The present invention particularly relates to a method of writing a servo pattern on mag... | 11/27/2007 |
| 7293226 | Method and apparatus for adaptively performing defect scan according to channel characteristics A method for performing a defect scan according to the characteristics of channels of a data storage system by determining design parameters based on the channel characteristics includes measuring characterization values related to the performance for channels of th... | 11/06/2007 |
| 7289300 | Piezoelectric motor for moving a carriage along a guide In one embodiment, an actuator comprises a stationary guide, a carriage movable along the guide, and a piezoelectric motor operatively coupled to the carriage and pushing on the guide such that the motor when energized moves with the carriage along the guide. ... | 10/30/2007 |
| 7280309 | Access performance adjusting method and storage apparatus An access performance adjusting method is adapted to a storage apparatus having a storage to prestore a skew quantity that is used to shift a data write starting position of each track of a recording medium depending on a head moving time required to move a head fro... | 10/09/2007 |
| 7271977 | Method to compensate for microjog error induced by localized track squeeze A method of reducing microjog errors in a disk drive having a data recording disk with data tracks and a transducer head positionable on the tracks. The head includes a writer element offset from a reader element. To reduce microjog errors, track squeeze is measured... | 09/18/2007 |
| 7253986 | System and method for deconvolution of multiple data tracks A system and method for reading a magnetic medium having a data band thereon, the data band comprising a plurality of simultaneously written data tracks and at least one alignment band. The system in one embodiment includes a plurality of adjacent readers for simult... | 08/07/2007 |
| 7248040 | Disk testing apparatus, disk testing method, computer-readable recording medium that stores a disk testing program, and disk apparatus including a disk to be tested A disk testing apparatus that sets a predetermined condition of a recording density for a disk apparatus, and conducts a test relating to at least readout of data stored in the disk apparatus includes a condition relaxing unit that relaxes, when a result of the test... | 07/24/2007 |
| 7239472 | Method and apparatus for writing data in a disk drive According to one embodiment, there is to provide a data write method which is applied to a disk drive, for recording data on a disk medium by a head mounted on a rotary type actuator. The method carries out a track pitch conversion processing so that a track pitch o... | 07/03/2007 |
| 7221151 | Magnetic array position sensor A sensor apparatus and method that can measure either a linear position or an angular position of a device. A linear array of galvanomagnetic sensing elements is fixedly mountable adjacent the device. A target is connectable to the device such that the target moves ... | 05/22/2007 |
| 7221534 | Piezoelectric crystal actuator and techniques for hysteresis reduction The invention proposes the use of a piezoelectric crystal element as an actuator for data storage systems. In particular, the piezoelectric crystal element mechanically positions a head with respect to a data storage medium. More specifically, the invention may use ... | 05/22/2007 |
| 7215494 | System and method for performing adaptive read retry operations in a data storage device A system and method for performing read retry operations with respect to an erroneously read data sector is disclosed. The system and method use estimates of bit error rates determined during previous attempts to read data from the sector to determine an optimal dis... | 05/08/2007 |
| 7212372 | Magnetic tape and magnetic tape cartridge There is provided a magnetic tape, to be used at a running speed of at least 4,000 mm/sec., wherein servo signals for controlling tracking are recorded on the magnetic layer or the backcoat layer, and wherein the difference between the recording track width and the ... | 05/01/2007 |
| 7206170 | Thin film servo head apparatus with canted servo gaps A thin film servo head apparatus is described that provides verification of time-based servo marks on a magnetic tape. The thin film servo head apparatus includes a plurality of thin film servo heads formed in a substrate. The substrate is canted such that servo gap... | 04/17/2007 |
| 7199957 | Write head alignment for full amplitude time-based servo The invention is directed to a servo writing apparatus having accurate alignment of write gaps of servo write heads. In particular, the write gaps substantially align in a servo channel corresponding to a servo band of a magnetic data storage tape. The servo band is... | 04/03/2007 |
| 7193812 | Recording head compensation for tape shrinkage and expansion A recording head to simultaneously read or write data to and from a plurality of tracks on magnetic tape, while compensating for shrinkage or expansion caused by moisture, temperature, creep caused by tension in the tape, creep caused by dimensional instability of t... | 03/20/2007 |
| 7193807 | Method and apparatus for reducing effective track width through highly skewed head angles A disk drive provides increased read and write element widths and tolerances, and also provides reduced track widths. The head with the read and write elements has a large skew angle relative to the tracks on the disk. The skew angle reduces the effective width of t... | 03/20/2007 |
| 7190551 | Composite magnetic head and process for producing the same A composite magnetic head comprising a DC-erasing head, which is slidably contact with a driving magnetic tape, and which DC-erases a servo band of the magnetic tape in such a manner that the direction of the magnetization of the servo band the servo band is directe... | 03/13/2007 |
| 7173781 | Multi-tracks MR offset tuning based on error count in certification process Embodiments of the present invention include a method and an apparatus for generating an optimal MRO for a zone having a plurality of tracks. A disc drive controller determines the optimum MRO of a zone of tracks by analyzing multiple tracks in the zone with the act... | 02/06/2007 |
| 7173785 | Data storage device and servo information writing method Provided is a data storage device in which read and write heads can be desirably located with respect to servo tracks from the viewpoint of linearity of a PES on the premise that a read write offset exists. A read write offset value, which is a deviation amount betw... | 02/06/2007 |
| 7170709 | Recording/reproducing method of magnetic tape In a recording/reproducing method of a magnetic tape in a tracking servo system, a recording density of each data track is increased while inhibiting occurrence of a recording/reproducing error caused by a size change of a magnetic tape in the width direction. Data ... | 01/30/2007 |
| 7158338 | Servo track having periodic frames of tone field and embedded synchronization marks Methods and systems for sensing a position of a transducer head with respect to a storage medium. One method includes generating a read signal from a servo track stored on a magnetic storage medium. The servo track includes servo frames of magnetic flux transitions ... | 01/02/2007 |
