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| Number | Title | Issue Date |
| 7817370 | System and method to avoid disk lube pooling A system and method to avoid disk lube pooling is presented. A track access monitor tracks the number of times that a program accesses a particular track located on a hard drive. When the track access monitor determines that the number of track accesses to a particu... | 10/19/2010 |
| 7791831 | Data storage disc track centering The invention is directed to methods and apparatus for repositioning a data storage disc on a spindle assembly, to reduce eccentricity of data on the disc. The eccentricity can be identified and be reduced automatically by determining the magnitude and direction of ... | 09/07/2010 |
| 7715143 | Delta-sigma PLL using fractional divider from a multiphase ring oscillator A disk drive controller includes a servo system operable to associate a time stamp with an arrival of a servo wedge, a firmware loop and core PLLs in the read channel. The firmware loop is operable to determine a period between the arrival of a pair of consecutive s... | 05/11/2010 |
| 7697230 | Tape drive position control In one embodiment a tape drive system comprises a reel adapted to engage a tape cartridge, the tape cartridge comprising a tape media having a servo code written along a length of the tape media, a tape head comprising at least one servo element to detect the servo ... | 04/13/2010 |
| 7605994 | Multiple sinusoidal seek servo system for reducing seek acoustics and seek time in hard disk drives A hard disk drive that includes a voice coil motor controlled by a servo. The servo provides a driving signal that has multiple sinusoidal waveforms. The multi-sinusoidal waveforms minimize seek time and vibrations in the drive. ... | 10/20/2009 |
| 7564640 | Apparatus for recording or retrieving data on magnetic tape A magnetic tape drive includes a magnetic head configured to read or write data on a magnetic tape, a transport unit configured to drive the magnetic tape past the magnetic head, a speed detector configured to obtain speed information related to a transport speed of... | 07/21/2009 |
| 7355656 | Video signal processing device and television receiving device A video signal processing device is provided comprising an input level detecting circuit for detecting an amplitude of a video signal to be processed and an analog/digital converter for performing analog/digital conversion of the video signal using as a reference vo... | 04/08/2008 |
| 7349621 | Information recording apparatus with selective control of recording medium and recording means drive means An information recording apparatus has a stop mode in which only recording means comprised of a rotatable drum on which a recording head is mounted and recording medium driving means comprised of a capstan/pinch roller are stopped, which stop mode can be changed fro... | 03/25/2008 |
| 7319652 | Controlling optical pickup of optical disk drive by detecting change of sampling signals taken from a motor drive signal A drive current or a drive voltage is controlled corresponding to change of load by sampling the drive current or drive voltage of a motor to move an optical pickup and then detecting change of the sampling signal as change of the optical pickup when it is moved. Mo... | 01/15/2008 |
| 7295395 | Sensing a prior transducer position by a motion pattern A motion pattern of an actuator supporting a head is monitored during/after a disc spin-up. The monitor's signal is configured to generate a digital indication of where the head was just before the spin-up. The digital indication is optionally a single-bit indicator... | 11/13/2007 |
| 7293189 | Method and device for reproducing additional data in synchronization with main data using time information A recording medium, method and apparatus for managing data are discussed. According to an embodiment, the present invention provides a method of reproducing main data and additional data. The method includes receiving the additional data associated with the main dat... | 11/06/2007 |
| 7274526 | Tape drive apparatus A tape drive apparatus has at least one rotary head for reading/writing a track. The track has a number of fragments and each fragment has an identifier. The tape drive apparatus has a position indicator apparatus for providing a signal that indicates a rotational p... | 09/25/2007 |
| 7269783 | Method and apparatus for dedicated hardware and software split implementation of rate matching and de-matching In the method of rate-matching, software is used to calculate at least one rate-matching parameter for data, and dedicated hardware is used to perform at least one of a puncturing and repetition process on data based on the calculated rate-matching parameter. In rat... | 09/11/2007 |
| 7251093 | Tape system with adjustable wrap angles and method for adjusting tape wrap angle A method for adjusting a tape wrap angle is described comprising the steps of operating the tape system to generate or regenerate an electrical signal in the head from the tape, either increasing or reducing the tape wrap angle as appropriate until a signal from the... | 07/31/2007 |
| 7245816 | Method for designing envelope detecting circuit for video signal processing integrated circuit and integrated circuit using the same In a method for designing an envelope detecting circuit for a video signal processing integrated circuit (IC), the number of peripheral components of the video signal processing IC is minimized by incorporating, into the video signal processing IC, a circuit device ... | 07/17/2007 |
| 7221985 | On-screen calibration system and operating method thereof An on-screen calibration system for disc drives and the operating method thereof. The calibration system includes an autocollimator detecting the inclined angle of the stage of a disc drive. A control module is connected to the on-screen display module and a bar cod... | 05/22/2007 |
| 7209312 | Self-servo-write using ramp-tracks Systems and techniques relating to writing servo information on a machine-readable medium. A technique includes forming servo information using a band of ramp-tracks generated based on a mechanical characteristic of a storage device. This can involve writing the ban... | 04/24/2007 |
| 7196861 | Method of evaluating positioning accuracy of a magnetic head tester A method of evaluating the positioning accuracy of a magnetic head tester can accurately test magnetic heads and so can reliably provide non-defective goods. In a method of evaluating the positioning accuracy of a magnetic head tester that tests the performance of a... | 03/27/2007 |
| 7193805 | Flying-type disk drive slider with micropad A slider (2′) with a reduced fly height is disclosed. The slider includes a small micropad (66) on the lower surface (22′) of the slider (2′). A sensor region (62) of a head (61) that is carried by the slider (2... | 03/20/2007 |
| 7183935 | Method and apparatus for determining motor velocity using edge mode hysteresis with a finite impulse response average filter A method for determining motor velocity includes generating an edge signal including a plurality of edges. The edge signal indicates rotational travel of a motor. Edge counts in the edge signal occurring during periodic sample intervals are determined. The edge coun... | 02/27/2007 |
| 7184234 | Compensation for jitter in servo signal within data storage device For compensating for jitter within a data storage device in real time, a jitter amount is determined from timings of servo signals for sectors of the data storage device. A timing of a servo gate pulse is adjusted for accessing another sector depending on the jitter... | 02/27/2007 |
| 7181636 | Method of ensuring synchronous presentation of additional data with audio data recorded on a rewritable recording medium A recording medium and a method and apparatus for managing data are provided. The method includes recording additional data in a data file separate from a file containing main data and recording navigation information that links the main data and the additional data... | 02/20/2007 |
| 7180699 | Method and apparatus for increasing capacity of magnetic media storage A method and apparatus for increasing the capacity of magnetic media storage is disclosed. More specifically, an improved two-sided magnetic tape is disclosed. In one implementation, in order to mitigate pack winding problems, a trade-off can be made between the bac... | 02/20/2007 |
| 7181569 | Method, system, and article of manufacture for writing on sequential storage media Provided are a method, system and article of manufacture for writing on a storage media. Data is received from a host. A determination is made whether the received data can potentially form a trailer record on the storage media. If the received data does not potenti... | 02/20/2007 |
| 7180694 | Recording and/or reproducing apparatus, recording and/or reproducing method, recording medium and program A recording apparatus of a tape-shaped magnetic recording medium includes a transfer unit, a recording head, a signal-processing unit and a control unit. The transfer unit transfers a tape-shaped magnetic recording medium having an anisotropic property oblique with ... | 02/20/2007 |
| 7173887 | Carriage servo method and apparatus for determining and setting a drive signal A carriage servo apparatus according to the present invention comprises: a carriage for supporting a pickup that records or reproduces information relevant to an information recording face; and a carriage motor for moving the carriage in a direction parallel to the ... | 02/06/2007 |
| 7170249 | Electrical phase compensation in BEMF spindle motor control A method and apparatus for compensating for the asymmetrical phases of a spindle motor in a disc drive are provided. With the apparatus and method, compensation values are learned by sampling speed data during a period of operation of the disc drive where the speed ... | 01/30/2007 |
| 7158339 | Recording/ reproducing method and recording/reproducing apparatus for magnetic tape A recording/reproducing method and a recording/reproducing apparatus for magnetic tapes are provided as a recording/reproducing technique suitable for recording density enhancement of magnetic tapes. The method and apparatus are capable of correctly recording and re... | 01/02/2007 |
| 7133238 | Servo track writing apparatus with a head assembly shroud A servo track writing apparatus for recording servo information or patterns on a disc or discs for a data storage device is disclosed. The servo track writing apparatus includes a shroud proximate to and downstream of a cantilevered head assembly to limit DC wander ... | 11/07/2006 |
| 7127576 | Method and system for data duplication According to one embodiment of the invention, a system for duplicating data is provided. The system includes a first recorder having an operating clock speed. An output port of the first recorder is permanently electrically coupled to an input port of a second recor... | 10/24/2006 |
| 7124434 | Information transmission system, and information sending apparatus and information receiving apparatus used therein A receiver sends a first random number to a transmitter. The transmitter generates a sync signal in response to the first random number sent from the receiver. The transmitter embeds the sync signal and key information in a second random number to generate a composi... | 10/17/2006 |
| 7124258 | Storage system and storage device system Under a hetero-environment in which different sorts of disk-systems are mixed with each other, a data guaranteeing operation can be carried out. When a cache controller of a local disk system receives a data writing request from a host computer the cache controller ... | 10/17/2006 |
| 7110205 | Method for controlling start of adaptive spindle motor and disk drive using the method A method of controlling starting current of an adaptive spindle motor in consideration of maximum allowable consumption power and a disk drive using the method. The method includes measuring a supply voltage supplied to the disk drive, calculating a maximum current ... | 09/19/2006 |
| 7110212 | Compensator for a synchronous sampling time-base servo system Disclosed are a system, a method, and article of manufacture to provide a compensator for a synchronous sampling servo control system. ... | 09/19/2006 |
| 7111113 | Apparatus and method to write information to and/or read information from an information storage medium A method to write information to an information storage medium. The method creates one or more objects comprising information and provides a first one of those one or more objects. The method writes a header label to an information storage medium, where the header l... | 09/19/2006 |
| 7095201 | Method and apparatus for providing a user selectable start-up current in a disk drive A method and apparatus for providing a user selectable start-up current in a disk drive are provided. A user may select a relatively high start-up current to provide a relatively fast start-up time in a disk drive. Alternatively, the user may select a relatively low... | 08/22/2006 |
| 7092196 | Characteristic measurement of an actuation drive coil and associated damping mechanism A system and method for analyzing a coil actuator of a type having a coil and a magnet. A current source selectively applies a first current to a coil of a coil actuator for setting a moveable part of the coil actuator to a first position. A recording system capture... | 08/15/2006 |
| 7092192 | Videotape recording and playback device, and videotape player The object of the present invention is to reduce the load and specification requirements on the network and the video server. The buffer usage rate is counted and supplied to the tape driving controller 7. In the reproduction mode, the tape driving controller... | 08/15/2006 |
| 7082486 | Method and apparatus for counting interrupts by type A method, apparatus, and computer instructions for counting interrupts by type. An interrupt count is incremented when a particular type of interrupt occurs. The count may be stored in the IDT or an interrupt count table outside the IDT. The interrupt unit increment... | 07/25/2006 |
| 7064649 | Magneto-resistive layer arrangement and gradiometer with said layer arrangement A magnetoresistive layer system including a layer sequence including at least two magnetic layers, a non-magnetic, electrically conductive intermediate layer being arranged between them; the electrical resistance of the layer system being changeable as a function of... | 06/20/2006 |
