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    ADAPTABLE SERVO CONTROLLERS
    11.
    发明申请
    ADAPTABLE SERVO CONTROLLERS 有权

    公开(公告)号：US20210358519A1

    公开(公告)日：2021-11-18

    申请号：US16875303

    申请日：2020-05-15

    Applicant: Seagate Technology LLC

    Inventor： Qiang Bi ,  Jin Quan Shen ,  Xiong Liu ,  Xiang Lu ,  Hui Wang

    IPC: G11B5/55

    Abstract: A device includes a servo controller that includes or that is coupled to memory. The memory stores multiple distinct disturbance control schemes. The servo controller is configured to select and implement one of the disturbance control schemes in response to receiving a command from a host. The servo controller can be implemented on a system on a chip.

    Direct current magnetoresistive jog offset compensation
    13.
    发明授权
    Direct current magnetoresistive jog offset compensation 有权

    公开(公告)号：US09837111B1

    公开(公告)日：2017-12-05

    申请号：US15341246

    申请日：2016-11-02

    Applicant: SEAGATE TECHNOLOGY LLC

    Inventor： Mingzhong Ding ,  Xiong Liu ,  Xiang Lu ,  Qiang Bi ,  Kian Keong Ooi

    IPC: G11B5/596

    CPC classification number: G11B5/59627 ,  G11B5/59694

    Abstract: Systems and methods for compensating for magnetoresistive (MR) jog offset direct current (DC) drift in a disc drive are described. In one embodiment, a method may include determining an occurrence of NOS, for example, by monitoring disc slip, to determine when the method should proceed. An MR jog offset DC drift amount is determined for each head of the disc drive. One of several approaches may be employed for determining the MR jog offset DC drift amount. By determining an MR jog offset DC drift amount for each head, a compensation profile is determined for the drive. The determined compensation profile may then be used during operation of the disc drive to compensate for the DC drift. One of several approaches may be employed for compensating based on the compensation profile.

    System and method for write-retry management
    15.
    发明授权
    System and method for write-retry management 有权

    公开(公告)号：US11264056B1

    公开(公告)日：2022-03-01

    申请号：US17061365

    申请日：2020-10-01

    Applicant: Seagate Technology LLC

    Inventor： Qiang Bi ,  Jian Qiang ,  WenXiang Xie

    IPC: G11B5/09 ,  G11B20/18 ,  G11B20/10

    Abstract: The technology disclosed herein pertains to a system and method for managing write failures in a disc drive. Implementations disclosed herein provide a method including monitoring write fault events per sector for a storage device, in response to a write fault event, updating a write fault repeat count table, wherein the repeat count table tracks a number of write fault repeat counts per sector, comparing a write fault repeat count for a sector to a predetermined threshold write fault repeat count, and in response to determining that the write fault repeat count for a sector is above the predetermined threshold write fault repeat count, performing a write-reassign operation.

    Interlaced magnetic recording storage system
    17.
    发明授权
    Interlaced magnetic recording storage system 有权

    公开(公告)号：US10593362B2

    公开(公告)日：2020-03-17

    申请号：US15676550

    申请日：2017-08-14

    Applicant: Seagate Technology LLC

    Inventor： Qiang Bi ,  Kian Keong Ooi ,  Christopher M. Woldemar ,  ShihMing Lau

    IPC: G11B20/18 ,  G06F12/0866 ,  G06F11/07 ,  G11B20/12

    Abstract: The disclosed technology provides a system and method that improves interlaced magnetic recording (IMR) data throughput in vibration in storage systems. In one implementation, a method includes determining whether there are write retry operations in the IMR storage device, determining whether bottom track caching space is available responsive to determining whether there are write retry operations in the IMR storage device, performing a vibration detection scheme to identify vibration events responsive to determining whether bottom track caching space is available, determining if a number of vibration events is above a predetermined threshold, and writing data to available bottom track caching space responsive to determining if the number of vibration events is above a predetermined threshold.

    Multi-speed data storage device with media cache for high speed writes
    18.
    发明授权
    Multi-speed data storage device with media cache for high speed writes 有权

    公开(公告)号：US10318173B2

    公开(公告)日：2019-06-11

    申请号：US15281857

    申请日：2016-09-30

    Applicant: Seagate Technology LLC

    Inventor： Kian Keong Ooi ,  Utt Heng Kan ,  Qiang Bi ,  Chi Sern Tan

    IPC: G06F3/06 ,  G11B19/28 ,  G06F12/0866 ,  G06F12/0875

    Abstract: Apparatus and method for managing data transfers in a data storage device with rotational media that can be rotated at different speeds. In some embodiments, a non-volatile main memory is formed on a rotatable medium accessed by a moveable data transducer. A media cache provides a non-volatile data storage area. A control circuit directs writes to the main memory as the medium is rotated at a first speed and directs reads from the main memory as the medium is rotated at a higher, second speed. Writes during the rotation of the medium at the second speed are directed to the media cache instead of to the main memory so that no data are written to the main memory at the second speed. The media cache may also be located on the medium or may be formed from solid-state semiconductor memory.

    Direct current magnetoresistive jog offset compensation
    19.
    发明授权
    Direct current magnetoresistive jog offset compensation 有权

    公开(公告)号：US10068600B2

    公开(公告)日：2018-09-04

    申请号：US15727399

    申请日：2017-10-06

    Applicant: SEAGATE TECHNOLOGY LLC

    Inventor： Mingzhong Ding ,  Xiong Liu ,  Xiang Lu ,  Qiang Bi ,  Kian Keong Ooi

    IPC: G11B5/596

    Abstract: Systems and methods for compensating for magnetoresistive (MR) jog offset direct current (DC) drift in a disc drive are described. In one embodiment, a method may include determining an occurrence of NOS, for example, by monitoring disc slip, to determine when the method should proceed. An MR jog offset DC drift amount is determined for each head of the disc drive. One of several approaches may be employed for determining the MR jog offset DC drift amount. By determining an MR jog offset DC drift amount for each head, a compensation profile is determined for the drive. The determined compensation profile may then be used during operation of the disc drive to compensate for the DC drift. One of several approaches may be employed for compensating based on the compensation profile.

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