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公开(公告)号：US10998009B1
公开(公告)日：2021-05-04
申请号：US16676091
申请日：2019-11-06
Applicant: Seagate Technology LLC
Inventor： Yichao Ma , Yimin Niu , Xiong Liu , Lionel Young
Abstract: A hard disk drive includes a base deck and a load/unload ramp component. The base deck includes a floor and sidewalls. The load/unload ramp component is coupled to the floor of the base deck. At least one of the sidewalls includes an arcuate extension portion that extends to contact the load/unload ramp component.
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公开(公告)号：US10896091B2
公开(公告)日：2021-01-19
申请号：US16426773
申请日：2019-05-30
Applicant: Seagate Technology LLC
Inventor： Wei Zhang , Xiong Liu , Choon Wei Ng , Zhi Ye
Abstract: A method includes storing a superset of data on a data storage medium along with a corresponding superset superparity. The superset of data includes multiple sets of data, and the corresponding superset superparity is calculated based on all of the multiple sets of data. The method also includes updating at least one subset of the superset of data. The subset has a subset superparity. The superset superparity is updated with the subset superparity, and the subset superparity and a location of the subset within the superset are employed to carry out error correction operations.
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公开(公告)号：US20200379845A1
公开(公告)日：2020-12-03
申请号：US16426773
申请日：2019-05-30
Applicant: Seagate Technology LLC
Inventor： Wei Zhang , Xiong Liu , Choon Wei Ng , Zhi Ye
Abstract: A method includes storing a superset of data on a data storage medium along with a corresponding superset superparity. The superset of data includes multiple sets of data, and the corresponding superset superparity is calculated based on all of the multiple sets of data. The method also includes updating at least one subset of the superset of data. The subset has a subset superparity. The superset superparity is updated with the subset superparity, and the subset superparity and a location of the subset within the superset are employed to carry out error correction operations.
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公开(公告)号：US20190392862A1
公开(公告)日：2019-12-26
申请号：US16524544
申请日：2019-07-29
Applicant: Seagate Technology LLC
Inventor： Xiong Liu , Lihong Zhang , PengBoon Khoo
Abstract: A magnetic recording medium includes a recording surface comprising a first recording layer having a first ferromagnetic resonant frequency and a second recording layer having a second ferromagnetic resonant frequency. The first recording layer is configured for storing user data and the second recording layer configured for storing servo data. A recording head arrangement is configured for microwave-assisted magnetic recording (MAMR) and writing user data to the first recording layer. The recording head arrangement comprises a write pole configured to generate a write magnetic field, and a write-assist arrangement proximate the write pole. The write-assist arrangement is configured to generate a radiofrequency assist magnetic field at a frequency that corresponds to the first ferromagnetic resonant frequency. A reader of the recording head arrangement is configured to read combined signals from the first and second recording layers.
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公开(公告)号：US10481873B2
公开(公告)日：2019-11-19
申请号：US15884952
申请日：2018-01-31
Applicant: Seagate Technology LLC
Inventor： Li Hong Zhang , WenXiang Xie , Xiong Liu
Abstract: A method includes detecting noise in a laser output of a heat assisted magnetic recording device. The noise is converted into an electrical signal including a numerical value. A least significant digit of the numerical value is selected. The least significant digit is concatenated with another least significant digit from another detecting of another noise in another laser output to form a number.
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Patent Agency Ranking
公开(公告)号：US10410662B1
公开(公告)日：2019-09-10
申请号：US16161916
申请日：2018-10-16
Applicant: Seagate Technology LLC
Inventor： Xiong Liu , Quan Li , Lihong Zhang , Chengyi Guo
Abstract: A disc drive includes a data storage surface having a system data zone and a user data zone, and a head that communicates with the data storage surface. The disc drive also includes a control circuit communicatively coupled to the head. The control circuit is configured to, during power up initialization of the disc drive, apply a fly height control value to direct the head to fly at a first target fly height for reading system data from the system data zone. The first target fly height is substantially higher than a second target fly height for reading user data from the user data zone. The control circuit determines whether an actual fly height of the head is substantially equal to the first target fly height. The control circuit performs fly height correction when the actual fly height is not substantially equal to the first target fly height.
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公开(公告)号：US10388328B1
公开(公告)日：2019-08-20
申请号：US15946816
申请日：2018-04-06
Applicant: Seagate Technology LLC
Inventor： Tai Zen Tan , Lihong Zhang , Xiong Liu
Abstract: A valve apparatus for a storage device includes a tab configured to couple to an enclosure and a flap coupled to the tab by a flexure. The flap is configured to regulate airflow through a breather hole of the enclosure. The flap includes an opening configured to reduce airflow into the enclosure when the flap is in a closed position.
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公开(公告)号：US10269380B1
公开(公告)日：2019-04-23
申请号：US15811978
申请日：2017-11-14
Applicant: Seagate Technology LLC
Inventor： Hao Sun , ChuenBuan Lee , Xiong Liu
Abstract: A disk drive including multiple magnetic recording disks and at least one read/write head, wherein the disk drive includes a rotatable center block having a vertical axis and a mounting member, a first motor attached to the center block for rotating the center block about the vertical axis, a vertical threaded rod positioned in the mounting member, a second motor moveable along the vertical threaded rod, at least one head suspension arm extending outwardly from the second motor, and at least one read/write head mounted to a distal end of one of the arms. The disk drive further includes multiple disks in a stack, wherein at least one of the arms is vertically moveable along the vertical threaded rod by the second motor to position the at least one read/write head in a position to access data on one of the disk surfaces of the plurality of disks.
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公开(公告)号：US20190103146A1
公开(公告)日：2019-04-04
申请号：US15720115
申请日：2017-09-29
Applicant: Seagate Technology LLC
Inventor： Andrew Michael Kowles , Mark Gaertner , Xiong Liu , WenXiang Xie , Kai Yang , Jiangnan Lin
IPC: G11C7/22 , G06F12/0871 , G11C11/409 , G11B5/31
Abstract: In accordance with one implementation, a method for reducing cache service time includes determining an access time parameter associated with movement of a read/write head to an access location for each of a plurality of contiguous cache storage segments and dynamically selecting one of the plurality of contiguous cache storage segments to store data based on the determined access time parameter.
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公开(公告)号：US20190103138A1
公开(公告)日：2019-04-04
申请号：US16205928
申请日：2018-11-30
Applicant: Seagate Technology LLC
Inventor： Jian Qiang , Xiong Liu , Choon Wei Ng , Sangyun Jung
Abstract: The disclosed technology includes methods and systems that reduce off-track write retry operations in shingled magnetic recording systems. In one implementation, the method includes writing data to an initial track, determining which side of the initial track is a shingled side, calculating a percentage of position error signal (PES) at a shingled side end of the initial track (PES1) when an off-track write operation occurs, determining whether the PES1 meets a first pre-determined threshold, continue writing data to a second track responsive to determining the PES1 is below a first pre-determined threshold, calculating a percentage of PES at a shingled side end of the second track (PES2), determining whether a combined value of PES1 and PES2 is above a second predetermined threshold to determine a probability value of the initial track being erased, and continue writing to a third track if the combined value is below the second predetermined threshold.
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