Patents by Inventor Jon D. Trantham

Jon D. Trantham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10431246
    Abstract: A recording surface of a magnetic disk is divided into first and second zones. A first head of a first actuator arm assembly reads from and/or writes to the first zone exclusively. A second head of a second actuator arm assembly reads from and/or writes to the second zone exclusively. The first and second head are capable of simultaneously reading from and writing to the recording surface.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 1, 2019
    Assignee: Seagate Technology LLC
    Inventors: Wenzhong Zhu, Kenneth Haapala, Jon D. Trantham
  • Patent number: 10408674
    Abstract: An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: September 10, 2019
    Assignee: Seagate Technology LLC
    Inventors: James Dillon Kiely, John Charles Duda, Patrick Carl Fletcher, Andrei Dorobantu, Jon D. Trantham
  • Patent number: 10366722
    Abstract: An apparatus comprises a laser diode configured to generate modulated light during a write operation in response to receiving modulated current having a mean amplitude that varies or is constant. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A writer heater of the slider is configured to receive power during the write operation having a magnitude that varies or is constant. A sensor is situated on or within the slider. The sensor is configured to produce a sensor signal representative of output optical power of the laser diode. Measuring circuitry is coupled to the sensor and configured to measure a change in the sensor signal indicative of a laser mode hop during the write operation.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: July 30, 2019
    Assignee: Seagate Technology LLC
    Inventors: Riyan Mendonsa, James Dillon Kiely, Joshua Ward Christensen, Jon D. Trantham, Chad Robert Barry, Tim Rausch
  • Publication number: 20190212192
    Abstract: An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
    Type: Application
    Filed: March 13, 2019
    Publication date: July 11, 2019
    Inventors: James Dillon Kiely, John Charles Duda, Patrick Carl Fletcher, Andrei Dorobantu, Jon D. Trantham
  • Patent number: 10268383
    Abstract: Two or more read modes of a data storage system and device are defined. The data storage device is capable of concurrently reading from two or more tracks using two or more read transducers. The read modes utilize different numbers of the two or more read transducers while reading data. The read modes are selected based on an operating condition of the data storage system or device.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: April 23, 2019
    Assignee: Seagate Technology LLC
    Inventors: Mehmet Fatih Erden, Scott Warmka, Mark Allen Gaertner, Jon D. Trantham
  • Publication number: 20190103132
    Abstract: An apparatus comprises a laser diode configured to generate light during a write operation. A slider comprises a near-field transducer (NFT) and an optical waveguide. The slider is configured for heat-assisted magnetic recording and to communicate the light to the NFT via the waveguide. A writer heater of the slider is configured to receive power during the write operation. A thermal sensor is situated at or near an air bearing surface of the slider. The thermal sensor is configured to produce a sensor signal in response to sensing back-heating from the medium while the NFT generates heat during a write operation. Circuitry, coupled to the thermal sensor, is configured to compare the sensor signal to a threshold and generate an output signal indicative of degradation of NFT performance in response to the sensor signal exceeding the threshold.
    Type: Application
    Filed: November 16, 2018
    Publication date: April 4, 2019
    Inventors: Riyan Mendonsa, Jon D. Trantham, James Dillon Kiely, Peng Li, Joshua Ward Christensen
  • Patent number: 10240975
    Abstract: An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: March 26, 2019
    Assignee: Seagate Technology LLC
    Inventors: James Dillon Kiely, John Charles Duda, Patrick Carl Fletcher, Andrei Dorobantu, Jon D. Trantham
  • Publication number: 20190026134
    Abstract: An application programming interface (API) that enables installation of an application as one or more key-value objects on a data storage drive such as a hard disk drive, a solid state drive or a hybrid drive. The API also enables execution of the application within a controlled environment of the data storage drive.
    Type: Application
    Filed: September 12, 2018
    Publication date: January 24, 2019
    Inventors: Jon D. Trantham, Timothy T. Walker, Mark A. Gaertner, Christopher A. Markey, Chiaming Yang, Bryan D. Wyatt
  • Patent number: 10157631
    Abstract: A slider includes an array of two or more transducer sets offset from one another in a cross-track direction. Each transducer set includes at least one writer and at least one reader. All of the transducer sets are configured to operate simultaneously to perform any combination of reading and writing on two or more tracks of a recording medium. At least one actuator is included between two the transducer sets. The actuator is configured to adjust a cross-track spacing between the two transducer sets in response to a control current.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: December 18, 2018
    Assignee: Seagate Technology LLC
    Inventors: Jon D. Trantham, Jason Bryce Gadbois, Mehmet Faith Erden
  • Publication number: 20180359227
    Abstract: A method includes adding a key version tag to an encryption key store that stores encryption keys. The key version tag is inserted into a data stream. The data stream including the key version tag is written to media. The data in the data stream is erased by scrambling the encryption keys and incrementing the key version tag in the encryption store by a digit. The data stream is replaced with a replacement data pattern when the key version tag stored in the encryption store and the key version tag located in the data stream mismatch.
    Type: Application
    Filed: June 12, 2017
    Publication date: December 13, 2018
    Inventors: Jon D. Trantham, Mark A. Gaertner, Monty Aaron Forehand, Paul Michael Wiggins
  • Patent number: 10147454
    Abstract: An apparatus comprises a laser diode configured to generate light during a write operation. A slider comprises a near-field transducer (NFT) and an optical waveguide. The slider is configured for heat-assisted magnetic recording and to communicate the light to the NFT via the waveguide. A writer heater of the slider is configured to receive power during the write operation. A thermal sensor is situated at or near an air bearing surface of the slider. The thermal sensor is configured to produce a sensor signal in response to sensing back-heating from the medium while the NFT generates heat during a write operation. Circuitry, coupled to the thermal sensor, is configured to compare the sensor signal to a threshold and generate an output signal indicative of degradation of NFT performance in response to the sensor signal exceeding the threshold.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: December 4, 2018
    Assignee: Seagate Technology LLC
    Inventors: Riyan Mendonsa, Jon D. Trantham, James Dillon Kiely, Peng Li, Joshua Ward Christensen
  • Patent number: 10147445
    Abstract: One or more detectors detect data from respective one or more analog sources operable to read from a storage medium. A buffer pool is between the decoders and two or more detectors. The decoders are simultaneously operable, via the buffer pool, to independently decode the data from the one or more detectors.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: December 4, 2018
    Assignee: Seagate Technology LLC
    Inventors: Bruce Douglas Buch, Mark Allen Gaertner, Jon D. Trantham, Mehmet Fatih Erden
  • Publication number: 20180330754
    Abstract: An apparatus comprises a laser diode configured to generate light during a write operation. A slider comprises a near-field transducer (NFT) and an optical waveguide. The slider is configured for heat-assisted magnetic recording and to communicate the light to the NFT via the waveguide. A writer heater of the slider is configured to receive power during the write operation. A thermal sensor is situated at or near an air bearing surface of the slider. The thermal sensor is configured to produce a sensor signal in response to sensing back-heating from the medium while the NFT generates heat during a write operation. Circuitry, coupled to the thermal sensor, is configured to compare the sensor signal to a threshold and generate an output signal indicative of degradation of NFT performance in response to the sensor signal exceeding the threshold.
    Type: Application
    Filed: May 15, 2017
    Publication date: November 15, 2018
    Inventors: Riyan Mendonsa, Jon D. Trantham, James Dillon Kiely, Peng Li, Joshua Ward Christensen
  • Patent number: 10026420
    Abstract: In a data storage device where a data writer is predicted to fail, cold data can be identified and subsequently moved to a data storage medium corresponding to the failing data writer. The data writer may be positioned proximal the data storage medium where data is stored. A controller can predict the failure in the data writer and transition all the data in the data storage medium to a read only status.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: July 17, 2018
    Assignee: Seagate Technology LLC
    Inventors: Tim Rausch, Jon D. Trantham, John W. Dykes
  • Patent number: 10020012
    Abstract: First and second servo control processors are coupled to respective first and second actuators that independently position first and second heads over one or more disks of a data storage drive. The first and second servo control processors are further coupled to first and second low-latency ports. First and second unidirectional buses couple the first and second low-latency ports. The first and second unidirectional busses are operable to isochronously exchange servo positioning data between the first and second servo control processors. The first and second servo control processors each use the servo positioning data to compensate for movement caused by another of the first and second servo control processors.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: July 10, 2018
    Assignee: Seagate Technology LLC
    Inventors: Aaron P. Weyer, Bruce Douglas Buch, Kyaw Sin Maung, Jon D. Trantham, Nicholas Paul Mati
  • Publication number: 20180174613
    Abstract: A recording surface of a magnetic disk is divided into first and second zones. A first head of a first actuator arm assembly reads from and/or writes to the first zone exclusively. A second head of a second actuator arm assembly reads from and/or writes to the second zone exclusively. The first and second head are capable of simultaneously reading from and writing to the recording surface.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 21, 2018
    Inventors: Wenzhong Zhu, Kenneth Haapala, Jon D. Trantham
  • Publication number: 20180144764
    Abstract: A slider includes an array of two or more transducer sets offset from one another in a cross-track direction. Each transducer set includes at least one writer and at least one reader. All of the transducer sets are configured to operate simultaneously to perform any combination of reading and writing on two or more tracks of a recording medium. At least one actuator is included between two the transducer sets. The actuator is configured to adjust a cross-track spacing between the two transducer sets in response to a control current.
    Type: Application
    Filed: January 17, 2018
    Publication date: May 24, 2018
    Inventors: Jon D. Trantham, Jason Bryce Gadbois, Mehmet Fatih Erden
  • Patent number: 9953673
    Abstract: A storage device disclosed herein includes a transducer head with a proximity sensor that generates head-disc proximity signals, a digitizer configured to convert the analog proximity signals from the proximity sensor to digitized sample data, a discrete wavelet transformation (DWT) module configured to analyze the digitized sample data by performing an enhanced DWT on the digitized sample data to generate DWT coefficients, and a modal filter configured to determine dominant head-disc interference (HDI) modes for a transducer head by analyzing the DWT coefficients.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: April 24, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Antanas Daugela, Jon D. Trantham, Scott E. Ryun
  • Publication number: 20180107499
    Abstract: A data storage drive that includes a data storage medium and drive control circuit communicatively coupled to the data storage medium. The data storage drive also includes embedded applet management circuitry that executes an application, installed in the data storage drive as one or more key-value objects, within a controlled environment of the data storage drive.
    Type: Application
    Filed: December 14, 2016
    Publication date: April 19, 2018
    Inventors: Jon D. Trantham, Robert John Warmka, Chiaming Yang, David B. Anderson, Bryan David Wyatt
  • Publication number: 20180107467
    Abstract: An application programming interface (API) that enables installation of an application as one or more key-value objects on a data storage drive such as a hard disk drive, a solid state drive or a hybrid drive. The API also enables execution of the application within a controlled environment of the data storage drive.
    Type: Application
    Filed: December 14, 2016
    Publication date: April 19, 2018
    Inventors: Chiaming Yang, Jon D. Trantham, Timothy Richard Feldman, Bryan David Wyatt, David B. Anderson, Robert John Warmka