Patents by Inventor Raye A. Sosseh
Raye A. Sosseh 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).
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Patent number: 11966623Abstract: Optimization of an aerial density capability (ADC) leveraging different qualities of media surfaces to which sub-portions of an encoded data portion are written. That is, data may be encoded to generate an encoded data portion according to a coding scheme. In turn, the encoded data portion may be divided into a plurality of sub-portions, each of which may be written to different media surfaces in a storage drive. The sub-portions may be read from the different media surfaces and combined to generate a recreated encoded data portion that is decoded using the coding scheme. As the encoded data portion is divided into sub-portions, the combined sub-portions may provide different error rates or signal-to-noise ratios that may allow for lower quality sub-portions to be assisted during the decoding process by higher quality sub-portions.Type: GrantFiled: April 11, 2022Date of Patent: April 23, 2024Assignee: SEAGATE TECHNOLOGY LLCInventors: Mehmet Fatih Erden, Mark A. Gaertner, Raye A. Sosseh
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Publication number: 20230325107Abstract: Optimization of an aerial density capability (ADC) leveraging different qualities of media surfaces to which sub-portions of an encoded data portion are written. That is, data may be encoded to generate an encoded data portion according to a coding scheme. In turn, the encoded data portion may be divided into a plurality of sub-portions, each of which may be written to different media surfaces in a storage drive. The sub-portions may be read from the different media surfaces and combined to generate a recreated encoded data portion that is decoded using the coding scheme. As the encoded data portion is divided into sub-portions, the combined sub-portions may provide different error rates or signal-to-noise ratios that may allow for lower quality sub-portions to be assisted during the decoding process by higher quality sub-portions.Type: ApplicationFiled: April 11, 2022Publication date: October 12, 2023Inventors: Mehmet Fatih ERDEN, Mark A. GAERTNER, Raye A. SOSSEH
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Patent number: 11462245Abstract: A method includes determining at least one of an areal density margin or a reliability margin for a combination of a head and a data storage surface in a data storage drive. The method also includes employing the determined at least one of the AD margin or the reliability margin to adjust an on-cylinder limit value associated with the combination of the head and the data storage surface.Type: GrantFiled: August 25, 2021Date of Patent: October 4, 2022Assignee: SEAGATE TECHNOLOGY LLCInventors: Raye A. Sosseh, Richard P. Michel, Evgeny Rafaelovich Kharisov, Mark A. Gaertner
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Publication number: 20220083467Abstract: Systems and methods are disclosed for employing a media read cache in a storage device. In certain embodiments, an, an apparatus may comprise a data storage drive including a volatile read cache, and a disc memory including a primary data storage region of the storage device configured for long-term storage of data via persistent logical block address to physical block address mapping, and a media read cache region configured to store a copy of data from the volatile read cache. The data storage drive may be configured to perform a read operation including: retrieve read data from the volatile read cache based on determining that the read data is available in the volatile read cache, and retrieve the read data from the media read cache based on determining that the read data is not available in the volatile read cache and is available in the media read cache.Type: ApplicationFiled: September 15, 2020Publication date: March 17, 2022Inventors: Raye A. Sosseh, Brian T. Edgar, Mark A. Gaertner
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Patent number: 11275684Abstract: Systems and methods are disclosed for employing a media read cache in a storage device. In certain embodiments, an, an apparatus may comprise a data storage drive including a volatile read cache, and a disc memory including a primary data storage region of the storage device configured for long-term storage of data via persistent logical block address to physical block address mapping, and a media read cache region configured to store a copy of data from the volatile read cache. The data storage drive may be configured to perform a read operation including: retrieve read data from the volatile read cache based on determining that the read data is available in the volatile read cache, and retrieve the read data from the media read cache based on determining that the read data is not available in the volatile read cache and is available in the media read cache.Type: GrantFiled: September 15, 2020Date of Patent: March 15, 2022Assignee: Seagate Technology LLCInventors: Raye A. Sosseh, Brian T. Edgar, Mark A. Gaertner
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Patent number: 11222658Abstract: A data storage device includes at least one data storage medium having a plurality of tracks. The data storage device also includes at least one actuator that supports at least one head that is configured to interact with different tracks of the plurality of tracks on the at least one data storage medium to service commands from a host. The data storage device further includes a seek control circuit communicatively coupled to the at least one actuator. The seek control circuit is configured to store the commands from the host in at least one queue for execution by the at least one actuator. The seek control module is also configured to adjust power provided to the at least one actuator for seek operations to the different tracks of the plurality of tracks based on command age-related measurements of the commands from the host.Type: GrantFiled: October 20, 2020Date of Patent: January 11, 2022Assignee: SEAGATE TECHNOLOGY LLCInventors: Josiah Natan Wernow, Raye A. Sosseh, Colin Graham Presly, Mark A. Gaertner
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Patent number: 11120825Abstract: Illustrative systems and methods disclosed herein may change or modify a seek during mid-seek for various reasons and may set seek speeds for various seeks to less than the maximum possible seek speed to, for example, facilitate seek target change or modifications mid-seek. For instance, the seek speeds for lower priority commands or commands at risk for deprioritization may be set to speeds less than the maximum possible seek speed.Type: GrantFiled: April 22, 2020Date of Patent: September 14, 2021Assignee: Seagate Technology LLCInventors: Raye A. Sosseh, Brian Thomas Edgar, Josiah Natan Wernow, Paul Michael Wiggins
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Patent number: 10964345Abstract: A data storage device includes a first data storage surface and a second data storage below the first data storage surface. The data storage device also includes a first micro-actuator coupled to a first arm that supports a first head over the first data storage surface, and a second micro-actuator coupled to a second arm that supports a second head over the second data storage surface. The data storage device further includes a coarse actuator, to which the first and second arms are coupled, that positions the first head and the second head between corresponding first and second tracks on the respective first and second data storage surfaces. Micro-actuator drive circuitry finely positions the first head over the first track and the second head over the second track by concurrently driving the first micro-actuator and the second micro-actuator in opposite directions.Type: GrantFiled: May 22, 2020Date of Patent: March 30, 2021Assignee: SEAGATE TECHNOLOGY LLCInventors: Kenneth Haapala, Binh Kim Lieu, Evgeny Kharisov, Raye A. Sosseh
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Patent number: 10418056Abstract: Implementations disclosed herein include a method to synthesize the controller of a multi-stage servo control system with multiple actuators in a hard disk drive by dividing controller synthesis into multiple dual-stage steps. The method includes measuring a first output of a first plant corresponding to a first actuator, measuring a second output of a second plant corresponding to a second actuator, designing a first controller responsive to the first output, designing a second controller responsive to the second output, and combining the first output and the second output to obtain a first combined output in a first dual-stage. The method also includes designing a third controller responsive to the first combined output, measuring a third output from a third plant corresponding to a third actuator, designing a fourth controller responsive to the third output, and combining the first combined output and the third output to obtain a second combined output.Type: GrantFiled: September 7, 2018Date of Patent: September 17, 2019Assignee: SEAGATE TECHNOLOGY LLCInventors: Tzung-Sz Shen, Bin Huang, Raye Sosseh, Ying Qi
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Publication number: 20190267033Abstract: Implementations disclosed herein include a method to synthesize the controller of a multi-stage servo control system with multiple actuators in a hard disk drive by dividing controller synthesis into multiple dual-stage steps. The method includes measuring a first output of a first plant corresponding to a first actuator, measuring a second output of a second plant corresponding to a second actuator, designing a first controller responsive to the first output, designing a second controller responsive to the second output, and combining the first output and the second output to obtain a first combined output in a first dual-stage. The method also includes designing a third controller responsive to the first combined output, measuring a third output from a third plant corresponding to a third actuator, designing a fourth controller responsive to the third output, and combining the first combined output and the third output to obtain a second combined output.Type: ApplicationFiled: September 7, 2018Publication date: August 29, 2019Inventors: Tzung-Sz Shen, Bin Huang, Raye Sosseh, Ying Qi
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Patent number: 10374528Abstract: A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.Type: GrantFiled: September 25, 2017Date of Patent: August 6, 2019Assignee: Seagate Technology LLCInventors: Binh Kim Lieu, Mark Lowell Elliott, Raye A. Sosseh
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Patent number: 10096332Abstract: Implementations disclosed herein include a method to synthesize the controller of a multi-stage servo control system with multiple actuators in a hard disk drive by dividing controller synthesis into multiple dual-stage steps. The method includes measuring a first output of a first plant corresponding to a first actuator, measuring a second output of a second plant corresponding to a second actuator, designing a first controller responsive to the first output, designing a second controller responsive to the second output, and combining the first output and the second output to obtain a first combined output in a first dual-stage. The method also includes designing a third controller responsive to the first combined output, measuring a third output from a third plant corresponding to a third actuator, designing a fourth controller responsive to the third output, and combining the first combined output and the third output to obtain a second combined output.Type: GrantFiled: February 28, 2018Date of Patent: October 9, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Tzung-Sz Shen, Bin Huang, Raye Sosseh, Ying Qi
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Publication number: 20180076742Abstract: A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.Type: ApplicationFiled: September 25, 2017Publication date: March 15, 2018Inventors: Binh Kim Lieu, Mark Lowell Elliott, Raye A. Sosseh
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Patent number: 9911442Abstract: An apparatus includes a first controller, a second controller, and a coupling compensator. The first controller is configured to generate a first voice coil motor (VCM) control signal in response to a first position error signal. The second controller is configured to generate a second VCM control signal in response to a second position error signal. The coupling compensator is configured to generate a first feedforward correction signal in response to the first VCM control signal. The first feedforward correction signal modifies the second VCM control signal to generate a modified second VCM control signal.Type: GrantFiled: November 23, 2016Date of Patent: March 6, 2018Assignee: Seagate Technology LLCInventors: Evgeny Kharisov, Josiah Natan Wernow, Kenneth A. Haapala, John C. Morris, Raye A. Sosseh
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Patent number: 9780700Abstract: A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.Type: GrantFiled: September 27, 2013Date of Patent: October 3, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Binh Kim Lieu, Mark Lowell Elliott, Raye A. Sosseh
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Patent number: 9621988Abstract: Certain exemplary aspects of the present disclosure are directed towards apparatuses and methods which mitigate the effect of speaker vibration on a disc drive. Audio associated with a speaker output is detected and triggers the generation of an output signal indicative of speaker vibration associated with such an audio output of a speaker. A magnetoresistive transducer of the disc drive is positioned relative to a storage medium based on the output signal, a target data storage location in the storage medium from which data is to be accessed via the positioning, and the position of the transducer. The output signal mitigates the effect of the speaker vibration on the transducer.Type: GrantFiled: December 17, 2013Date of Patent: April 11, 2017Assignee: Seagate Technology LLCInventors: Lealon R. McKenzie, Evgeny Kharisov, Zai Yu Nang, Qiang Bi, Seow Zhao Li, Raye A. Sosseh
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Patent number: 9361919Abstract: An apparatus includes a first read/write head coupled to a first micro actuator, a second read/write head coupled to a second micro actuator, an actuator and a controller. The actuator is coupled to both the first and second micro actuators. The controller is configured to position the first read/write head in response to a first micro actuator control signal and an actuator control signal. Further, the controller is configured to position the second read/write head in response to a second micro actuator control signal and the actuator control signal. The positioning of the first and second read/write heads by the controller is performed substantially simultaneously.Type: GrantFiled: October 5, 2015Date of Patent: June 7, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Binh Kim Lieu, Evgeny Kharisov, Kenneth Haapala, Raye A. Sosseh
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Patent number: 9142246Abstract: An apparatus includes a plurality of magnetic read/write heads, a system controller and a switching network. Each of the magnetic read/write heads includes a read sensor element configured to perform a read operation and a write element configured to perform a write operation. The switching network is coupled between the plurality of magnetic read/write heads and the controller. Further, the switching network is configured to substantially simultaneously select elements from at least two of the plurality of magnetic read/write heads in response to a command from the controller such that the operations of the selected elements are performed substantially simultaneously to establish a manufacturing parameter of a disk drive.Type: GrantFiled: October 10, 2014Date of Patent: September 22, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Jon Trantham, Christopher Thomas Cole, Raye A Sosseh, Kenneth Haapala
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Publication number: 20150172810Abstract: Certain exemplary aspects of the present disclosure are directed towards apparatuses and methods which mitigate the effect of speaker vibration on a disc drive. Audio associated with a speaker output is detected and triggers the generation of an output signal indicative of speaker vibration associated with such an audio output of a speaker. A magnetoresistive transducer of the disc drive is positioned relative to a storage medium based on the output signal, a target data storage location in the storage medium from which data is to be accessed via the positioning, and the position of the transducer. The output signal mitigates the effect of the speaker vibration on the transducer.Type: ApplicationFiled: December 17, 2013Publication date: June 18, 2015Applicant: Seagate Technology LLCInventors: Lealon R. McKenzie, Evgeny Kharisov, Zai Yu Nang, Qiang Bi, Seow Zhao Li, Raye A. Sosseh
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Publication number: 20150091475Abstract: A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.Type: ApplicationFiled: September 27, 2013Publication date: April 2, 2015Applicant: Seagate Technology LLCInventors: Binh Kim Lieu, Mark Lowell Elliott, Raye A. Sosseh