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    Fast partial erasure for drive sanitization
    32.
    发明授权
    Fast partial erasure for drive sanitization 有权

    公开(公告)号：US12131758B2

    公开(公告)日：2024-10-29

    申请号：US18223896

    申请日：2023-07-19

    Applicant: Seagate Technology LLC

    Inventor： Xiong Liu ,  Lihong Zhang ,  Quan Li ,  Wenxiang Xie

    IPC: G11B5/265 ,  G11B5/55

    CPC classification number: G11B5/2654 ,  G11B5/5547

    Abstract: A method involves determining a threshold error rate that will result on data stored on a magnetic disk surface of a disk drive being unrecoverable. The method also involves determining a seek velocity that will overwrite sufficient portions of the data such the data will exhibit at least the threshold error rate. The disk drive performs at least one traversal of the magnetic disk surface with a head of the disk drive that emits an erase field during the at least one traversal at the seek velocity. The at least one traversal sanitizes the data.

    ALTERNATE REALITY DATA SYSTEM
    33.
    发明公开
    ALTERNATE REALITY DATA SYSTEM 审中-公开

    公开(公告)号：US20230400910A1

    公开(公告)日：2023-12-14

    申请号：US17836340

    申请日：2022-06-09

    Applicant: Seagate Technology, LLC

    Inventor： Jin Quan Shen ,  Xiong Liu ,  Choon Wei Ng ,  Abhay T. Kataria

    IPC: G06F3/01 ,  G06F3/04815 ,  G06T19/00

    CPC classification number: G06F3/011 ,  G06F3/04815 ,  G06T19/006

    Abstract: An alternate reality, such as virtual reality or augmented reality, environment can experience optimized performance with a data system arranged with an interaction device connected to a virtual reality assembly. Base content and user content can respectively be downloaded and stored to a local data storage of the virtual reality assembly. The content may be utilized to proactively generate comprehensive content that consists of merged aspects of the base content and the user content. The comprehensive content can then be executed to create an immersive digital reality conveyed to a user via the interaction device.

    Skew-independent close-point transducers
    34.
    发明授权
    Skew-independent close-point transducers 有权

    公开(公告)号：US11830530B1

    公开(公告)日：2023-11-28

    申请号：US17573313

    申请日：2022-01-11

    Applicant: Seagate Technology LLC

    Inventor： Lihong Zhang ,  Xiong Liu ,  Yanming Tan

    IPC: G11B5/60

    CPC classification number: G11B5/6082

    Abstract: A slider for use in a disk drive includes a substrate surface to be spaced from recording media surface within the disk drive, at least one read/write transducer having a transducer end surface adjacent and proximate to the substrate surface, a protrusion controller associated with the at least one read/write transducer. The transducer end surface includes a preformed protrusion extending generally in a direction perpendicular to the substrate surface, the protrusion is substantially centered along the transducer end surface, and the protrusion formed to passively provide a consistently-positioned close-point to the recording media surface when the protrusion controller is active.

    Z-HEIGHT CONTROL FOR DISC DRIVE USING SERVO WEDGE TIMING
    35.
    发明公开
    Z-HEIGHT CONTROL FOR DISC DRIVE USING SERVO WEDGE TIMING 审中-公开

    公开(公告)号：US20230260547A1

    公开(公告)日：2023-08-17

    申请号：US17670627

    申请日：2022-02-14

    Applicant: Seagate Technology LLC

    Inventor： Xiong Liu ,  Choon Kiat Lim ,  June Christian Ang ,  Yichao Ma

    IPC: G11B21/24

    CPC classification number: G11B21/24

    Abstract: A data storage device includes a disc, an actuator arm assembly, a servo clock, and a feedback and control system. The disc includes a top and bottom surfaces and a servo wedge. The servo wedge includes a top surface boundary and a bottom surface boundary. The actuator arm assembly supports a head pair configured for interaction with the top and bottom surfaces. The servo clock is configured to determine a top time at which the head pair encounters the top surface boundary and a bottom time at which the head pair encounters the bottom surface boundary during a disc read/write interaction. The feedback and control system is configured to determine an operation time difference; compare the operation time difference to a certification time difference correlating to a target vertical position of the actuator arm assembly relative to the disc; and move the actuator arm assembly to the target vertical position.

    Zero skew with ultrasonic piezoelectric swing suspension
    36.
    发明授权
    Zero skew with ultrasonic piezoelectric swing suspension 有权

    公开(公告)号：US11468909B1

    公开(公告)日：2022-10-11

    申请号：US17517061

    申请日：2021-11-02

    Applicant: Seagate Technology LLC

    Inventor： Cho Kok Liang ,  Xiong Liu ,  Than Zaw Myint ,  Yichao Ma

    IPC: G11B5/48

    Abstract: A data storage device includes a base, a data storage disk, an actuator arm, a suspension, and a piezoelectric actuator. The data storage disk is attached to the base and has a read/write surface defining an x-y plane. The actuator arm is attached to the base at a first pivot point to rotate parallel to the x-y plane. The suspension is attached to the actuator arm at a second pivot point, the suspension having a first end comprising a curved edge surface, and a second end supporting a head that is configured to interact with the read/write surface. The piezoelectric actuator is disposed on the actuator arm and comprises a biasing finger configured to contact the curved edge surface to rotate the suspension parallel to the x-y plane about the second pivot point. An actuator arm assembly and a method of use are also described.

    Disk drive with multiple actuators on a pivot axis
    37.
    发明授权
    Disk drive with multiple actuators on a pivot axis 有权

    公开(公告)号：US11443763B1

    公开(公告)日：2022-09-13

    申请号：US17351804

    申请日：2021-06-18

    Applicant: Seagate Technology LLC

    Inventor： Yichao Ma ,  Xiong Liu

    IPC: G11B5/48

    Abstract: A data storage device includes a stack of data storage disks mounted on a spindle, a first arm and a second arm. The stack comprises a first plurality of upper disks and second plurality of lower disks. The first arm is movably attached to an actuator shaft, the first arm having a first head end that supports a first head, the first arm configured to move along a first portion of the actuator shaft to enable the first head to interact with data storage surfaces of the first plurality of upper disks. The second arm has a second head end that supports a second head, the second arm attached to and configured to move along a second portion of the actuator shaft, independently of the first arm, to enable the second head to interact with data storage surfaces of the second plurality of lower disks.

    System and method for managing off-track read retry
    39.
    发明授权
    System and method for managing off-track read retry 有权

    公开(公告)号：US11295777B1

    公开(公告)日：2022-04-05

    申请号：US17086003

    申请日：2020-10-30

    Applicant: Seagate Technology LLC

    Inventor： Xiong Liu ,  Quan Li

    IPC: G11B5/09 ,  G11B20/10

    Abstract: The technology disclosed herein pertains to a system and method for managing off-track retry. An implementation of a method of determining offset direction for read off-track retry includes storing analog to digital converter (ADC) values of data read from a data sector by a data reader in a read channel buffer, calculating an indicator value of the distribution of the ADC values, determining an amount of offset for the data reader based on the indicator value, and moving the data reader by the amount of offset before performing a read retry operation.

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