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    Health check for read/write head
    25.
    发明授权
    Health check for read/write head 有权
    健康检查读/写头

    公开(公告)号：US09536550B1

    公开(公告)日：2017-01-03

    申请号：US14945715

    申请日：2015-11-19

    Applicant: Seagate Technology LLC

    Inventor： Minjie Ma ,  Edmun Seng ,  Tim Rausch ,  Edward Charles Gage

    IPC: G11B27/36 ,  G11B5/09 ,  G11B5/455 ,  G11B5/00

    CPC classification number: G11B5/455 ,  G11B5/5534 ,  G11B2005/0021

    Abstract: A cross-track profile of a known good test track on a recording medium is read during operation of a data storage device. Two or more center locations of the test track are determined at two or more different amplitude levels via a read transducer. A health condition of the read transducer is determined by comparing the two or more center locations of the test track with one another.

    Abstract translation: 在数据存储设备的操作期间读取记录介质上已知的良好测试轨迹的交叉轨道轮廓。 测试轨道的两个或更多个中心位置通过读取换能器以两个或多个不同的振幅水平确定。 通过将测试轨道的两个或更多个中心位置相互比较来确定读取换能器的健康状况。

    Controlling laser output in a HAMR device
    26.
    发明授权
    Controlling laser output in a HAMR device 有权
    控制HAMR设备中的激光输出

    公开(公告)号：US09355671B2

    公开(公告)日：2016-05-31

    申请号：US14278377

    申请日：2014-05-15

    Applicant: Seagate Technology LLC

    Inventor： Tim Rausch ,  Jon D. Trantham ,  John W. Dykes ,  Won Choul Yang

    IPC: G11B7/125 ,  G11B11/00 ,  G11B7/1267 ,  G11B7/1263 ,  G11B7/007 ,  G11B19/04

    CPC classification number: G11B7/1263 ,  G11B5/012 ,  G11B5/02 ,  G11B7/00736 ,  G11B7/1267 ,  G11B19/046 ,  G11B2005/0021

    Abstract: A method of controlling laser output in a heat assisted magnetic recording device can be performed by control circuitry in a data storage device. The method includes measuring a temperature, measuring laser output power of a laser, determining a power error by subtracting an optimal laser output power from the measured laser output power and comparing the power error to at least one threshold to determine whether an applied current to the laser needs to be adjusted. The at least one threshold is related to how great the power error can be while maintaining the integrity of data on a recording medium.

    Abstract translation: 控制热辅助磁记录装置中的激光输出的方法可由数据存储装置中的控制电路执行。 该方法包括测量温度，测量激光器的激光输出功率，通过从所测量的激光输出功率减去最佳激光输出功率并将功率误差与至少一个阈值进行比较来确定功率误差，以确定施加到 激光需要调整。 至少一个阈值与维持记录介质上数据完整性的功率误差有多大关系。

    Data loss mitigation in a heat assisted magnetic recording data storage device
    28.
    发明授权
    Data loss mitigation in a heat assisted magnetic recording data storage device 有权
    热辅助磁记录数据存储设备中的数据丢失缓解

    公开(公告)号：US09218849B1

    公开(公告)日：2015-12-22

    申请号：US14552139

    申请日：2014-11-24

    Applicant: Seagate Technology LLC

    Inventor： Jon D. Trantham ,  Tim Rausch ,  John W. Dykes ,  Edward C. Gage

    IPC: G11B27/36

    CPC classification number: G11B27/36 ,  G11B20/1879 ,  G11B20/1889 ,  G11B2005/0021 ,  G11B2220/2516

    Abstract: A data storage device may employ a heat assisted magnetic recording data writer separated from a plurality of data bits stored on a media surface of a data storage medium. At least one controller and a prediction circuit that is connected to the heat assisted magnetic recording data writer can be configured to remap the media surface in response to a predicted heat assisted magnetic recording data writer failure.

    Abstract translation: 数据存储装置可以使用从存储在数据存储介质的介质表面上的多个数据位分离的热辅助磁记录数据写入器。 连接到热辅助磁记录数据写入器的至少一个控制器和预测电路可以被配置为响应于预测的热辅助磁记录数据写入器故障重新映射介质表面。

    Clearance sensor and circuitry using adjustable channel parameters
    29.
    发明授权
    Clearance sensor and circuitry using adjustable channel parameters 有权
    间隙传感器和使用可调节通道参数的电路

    公开(公告)号：US09123372B2

    公开(公告)日：2015-09-01

    申请号：US14457518

    申请日：2014-08-12

    Applicant: Seagate Technology LLC

    Inventor： Housan Dakroub ,  Edward Charles Gage ,  Tim Rausch

    IPC: G11B11/00 ,  G11B5/09 ,  G11B5/60 ,  G11B11/105 ,  G11B20/10

    CPC classification number: G11B5/6076 ,  G11B5/6005 ,  G11B5/607 ,  G11B11/10554 ,  G11B20/10009

    Abstract: A transducer is configured to interact with a magnetic storage medium, a first channel comprises a first sensor and first circuitry configured to adjust a plurality of first channel parameters, and a second channel comprises a second sensor and second circuitry configured to adjust a plurality of second channel parameters. The first and second channel parameters are independently adjustable by the first and second circuitry, respectively. A detector is coupled to the first and second channels, and configured to detect a head-medium interface event.

    Abstract translation: 换能器被配置为与磁存储介质相互作用，第一通道包括第一传感器和配置成调整多个第一通道参数的第一电路，第二通道包括第二传感器和第二电路，其被配置为调整多个第二通道参数 通道参数。 第一和第二通道参数分别由第一和第二电路独立地调节。 检测器耦合到第一和第二通道，并且被配置为检测头 - 介质接口事件。

    HAMR channel to preamp interface
    30.
    发明授权
    HAMR channel to preamp interface 有权
    HAMR通道前置放大器接口

    公开(公告)号：US09123355B1

    公开(公告)日：2015-09-01

    申请号：US14028413

    申请日：2013-09-16

    Applicant: Seagate Technology LLC

    Inventor： Housan Dakroub ,  Christine Green ,  Edward C. Gage ,  Tim Rausch

    IPC: G11B11/00 ,  G11B5/02 ,  G11B13/04 ,  G11B11/105 ,  G11B5/00 ,  G11B7/126

    CPC classification number: G11B5/02 ,  G11B5/455 ,  G11B7/126 ,  G11B11/10515 ,  G11B11/1053 ,  G11B11/10595 ,  G11B13/04 ,  G11B2005/001 ,  G11B2005/0021

    Abstract: A circuit may be configured to reduce the power consumption and extend the life of a near field transducer of a heat-assisted magnetic recording (HAMR) device by pulsing a laser. The current that drives the laser may be of a frequency and magnitude so as to approximate the value of a continuous current in a continuous, non-pulsed laser. A system on chip (SOC), which may include a HAMR channel, can generate a laser data signal that may be synchronous with, and offset from, a write signal by a certain period of time, and may calculate certain parameters such as peak current and pulse width that may be applied to the signals in a preamp. The preamp signals can be used to program data to a disc medium.

    Abstract translation: 电路可以被配置为通过脉冲激光来减少功率消耗并延长热辅助磁记录（HAMR）装置的近场传感器的寿命。 驱动激光器的电流可以是频率和幅度，以便在连续的非脉冲激光器中接近连续电流的值。 可以包括HAMR通道的片上系统（SOC）可以产生与写入信号同步并偏移一定时间段的激光数据信号，并且可以计算某些参数，例如峰值电流 以及可以施加到前置放大器中的信号的脉冲宽度。 前置放大器信号可用于将数据编程到盘介质。

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