公开(公告)号：US09105290B2

公开(公告)日：2015-08-11

申请号：US14103396

申请日：2013-12-11

Applicant: Seagate Technology LLC

Inventor： Shuang Quan Min ,  June Christian Ang ,  Tze Ming Jimmy Pang ,  Kian Keong Ooi

IPC: G11B21/02 ,  G11B5/55

CPC classification number: G11B5/5565 ,  G11B5/54 ,  G11B5/553

Abstract: In accordance with one embodiment of the described technology, a retract controller capacitor is charged using a back electromagnetic force voltage to produce a backup power source voltage, the retract controller capacitor is discharged to power a retract controller circuit, and an actuator arm of a storage drive is driven toward a desired location concurrently with the discharging operation.

Abstract translation: 根据所述技术的一个实施例，使用背面电磁力电压对缩回控制电容器进行充电以产生备用电源电压，放电控制器电容器被放电以为后退控制器电路供电，并且存储器的致动器臂 驱动器与放电操作同时被驱动到期望的位置。

公开(公告)号：US20190051329A1

公开(公告)日：2019-02-14

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.

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.

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.

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.

公开(公告)号：US20180061452A1

公开(公告)日：2018-03-01

申请号：US15247382

申请日：2016-08-25

Applicant: Seagate Technology LLC

Inventor： Qiang Bi ,  GuoQing Zhang ,  Kian Keong Ooi ,  MingZhong Ding ,  WenJun Cao

IPC: G11B20/14

CPC classification number: G11B5/596

Abstract: An apparatus includes a disk locked clock system and a feedforward microactuator compensator. The disk locked clock system is configured to estimate a timing error and generate a timing error signal. The feedforward microactuator compensator is configured to generate a microactuator compensation signal, without use of a vibration sensor signal, in response to the timing error signal.

公开(公告)号：US09520149B1

公开(公告)日：2016-12-13

申请号：US15170859

申请日：2016-06-01

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.

Abstract translation: 描述了用于补偿磁盘驱动器中的磁阻（MR）点动偏移直流（DC）漂移的系统和方法。 在一个实施例中，方法可以包括例如通过监视盘滑移来确定NOS的发生，以确定该方法何时进行。 确定磁盘驱动器的每个头部的MR点动偏移DC漂移量。 可以采用几种方法之一来确定MR点动偏移DC漂移量。 通过确定每个磁头的MR点动偏移DC漂移量，确定驱动器的补偿曲线。 然后可以在盘驱动器的操作期间使用所确定的补偿曲线以补偿DC漂移。 可以采用几种方法中的一种来基于补偿曲线进行补偿。

公开(公告)号：US20150162035A1

公开(公告)日：2015-06-11

申请号：US14103396

申请日：2013-12-11

Applicant: Seagate Technology LLC

Inventor： Shuang Quan Min ,  June Christian Ang ,  Tze Ming Jimmy Pang ,  Kian Keong Ooi

IPC: G11B5/55

CPC classification number: G11B5/5565 ,  G11B5/54 ,  G11B5/553

Abstract: In accordance with one embodiment of the described technology, a retract controller capacitor is charged using a back electromagnetic force voltage to produce a backup power source voltage, the retract controller capacitor is discharged to power a retract controller circuit, and an actuator arm of a storage drive is driven toward a desired location concurrently with the discharging operation.

Abstract translation: 根据所述技术的一个实施例，使用背面电磁力电压对缩回控制电容器进行充电以产生备用电源电压，放电控制器电容器被放电以为后退控制器电路供电，并且存储器的致动器臂 驱动器与放电操作同时被驱动到期望的位置。

公开(公告)号：US20180095673A1

公开(公告)日：2018-04-05

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 ,  G06F12/0871 ,  G11B19/28

CPC classification number: G06F3/0611 ,  G06F3/0656 ,  G06F3/068 ,  G06F12/0866 ,  G06F12/0875 ,  G06F2212/217 ,  G06F2212/222 ,  G06F2212/224 ,  G11B19/28

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.

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.