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11. 发明授权

US09437232B1 Magnetic recording disk drive with write position error signal values written in the data tracks for compensation of track misregistration 有权
标题翻译：磁记录磁盘驱动器，写入位置误差信号值写入数据轨道，以补偿轨道重合失调
公开(公告)号：US09437232B1
公开(公告)日：2016-09-06
申请号：US14800444
申请日：2015-07-15
申请人： HGST Netherlands B.V.
发明人： Richard Leo Galbraith , Weldon Mark Hanson , Roger William Wood
IPC分类号： G11B5/58 , G11B5/596
CPC分类号： G11B5/59627 , G11B5/012 , G11B5/59672 , G11B5/59688
摘要： A hard disk drive is adapted to take the most recent estimated read head positions (the position error signal or PES values) that are obtained during writing and write those values into the data sectors as written PES (WPES) values. The WPES values are available on readback for use as a predictor of the positions in which subsequent data sectors were written and are also available for use in a data recovery procedure should a particular data sector fail to be recovered. In two-dimensional magnetic recording, the difference between the WPES value and the read PES value is a quantity required to rapidly select the best 2D equalizer. The PES values may be encoded prior to being written into the data sectors. The WPES values are appended to the data sectors after the preamble and sync fields, which occur after every servo sector.
摘要翻译：硬盘驱动器适于拍摄写入期间获得的最新估计的读取头位置（位置误差信号或PES值），并将这些值作为书面PES（WPES）值写入数据扇区。 WPES值在回读时可用，用作后续数据扇区写入位置的预测器，如果特定数据扇区无法恢复，也可用于数据恢复过程。在二维磁记录中，WPES值和读取的PES值之间的差是快速选择最佳2D均衡器所需的量。可以在写入数据扇区之前对PES值进行编码。在每个伺服扇区之后发生的前同步码和同步字段之后，WPES值附加到数据扇区。

12. 发明授权

US09373355B1 Compensating for interference via a multi-reader system 有权
标题翻译：通过多读取系统补偿干扰
公开(公告)号：US09373355B1
公开(公告)日：2016-06-21
申请号：US14611122
申请日：2015-01-30
申请人： Seagate Technology LLC
发明人： Riyan Alex Mendonsa , Puskal P Pokharel , Timothy F Ellis
IPC分类号： G11B5/58 , G11B5/584 , G11B20/10
CPC分类号： G11B20/10046
摘要： The disclosure is related to systems and methods of compensating for interference via a multi-reader system. A transducer or read/write head may include a write element and multiple read elements. A compensation circuit can be configured to process read signals from the multiple read elements to reduce noise within the read signals, such as caused by the writer being simultaneously active or for other reasons. The read signals may be combined to produce a compensated read signal that has less noise than the original read signals.
摘要翻译：本公开涉及通过多读取器系统补偿干扰的系统和方法。换能器或读/写头可以包括写入元件和多个读取元件。补偿电路可以被配置为处理来自多个读取元件的读取信号，以减少读取信号中的噪声，例如由写入器同时激活或由于其它原因引起的噪声。读取信号可以被组合以产生具有比原始读取信号更小的噪声的经补偿的读取信号。

13. 发明授权

US09330714B2 Tape media kiss-contact read verification 有权
公开(公告)号：US09330714B2
公开(公告)日：2016-05-03
申请号：US14818335
申请日：2015-08-05
申请人： International Business Machines Corporation
发明人： Robert G. Biskeborn , Calvin S. Lo , Tak H. Wong , Xu Yan
IPC分类号： G11B5/02 , G11B27/36 , G11B20/18 , G11B5/008 , G11B5/455 , G11B20/10 , G11B5/58
CPC分类号： G11B5/60 , G11B5/00813 , G11B5/02 , G11B5/455 , G11B5/581 , G11B20/10305 , G11B20/10388 , G11B20/10472 , G11B20/18 , G11B27/36
摘要： A supplemental module that includes one or more read elements periodically engages a magnetic recording medium, and the read elements generate an electrical signal corresponding to transitions written to the magnetic recording medium by a write element. A computer receives information representative of the electrical signal and determines if a quality metric of the magnetic recording medium derived from the electrical signal is within a defined range. If the quality metric is not within the defined range, a defined action is performed by the computer.

14. 发明授权

US09311937B2 Systems and methods for calibrating read and write operations in two dimensional magnetic recording 有权
标题翻译：用于校准二维磁记录中读写操作的系统和方法
公开(公告)号：US09311937B2
公开(公告)日：2016-04-12
申请号：US14331553
申请日：2014-07-15
申请人： Marvell World Trade Ltd.
发明人： Qiyue Zou , Michael Madden , Gregory Burd
IPC分类号： G11B5/455 , G11B5/58 , G11B5/012 , G11B5/596 , G11B5/48 , G11B20/10
CPC分类号： G11B5/455 , G11B5/012 , G11B5/4886 , G11B5/58 , G11B5/59627 , G11B5/59683 , G11B20/10
摘要： Systems and methods are provided for calibrating signals retrieved from a storage device using a first reader and a second reader. The systems and methods further include reading a first signal using the first reader and a second signal using the second reader. Control circuitry computes a calibration metric associated with the first reader and the second reader based on the combination of the first signal and the second signal. At least one of the first signal and the second signal is subsequently decoded based in part on the computed calibration metric.
摘要翻译：提供了用于使用第一读取器和第二读取器校准从存储设备检索的信号的系统和方法。系统和方法还包括使用第一读取器读取第一信号和使用第二读取器读取第二信号。控制电路基于第一信号和第二信号的组合来计算与第一读取器和第二读取器相关联的校准度量。部分地基于所计算的校准度量，随后对第一信号和第二信号中的至少一个进行解码。

15. 发明授权

US09245559B2 Track misregistration sensitive initialization of joint equalizer 有权
标题翻译：追踪联合均衡器的对准敏感初始化
公开(公告)号：US09245559B2
公开(公告)日：2016-01-26
申请号：US14263562
申请日：2014-04-28
申请人： LSI Corporation
发明人： George Mathew , Jongseung Park , Eui Seok Hwang
IPC分类号： G11B5/035 , G11B5/596 , G11B20/10 , G06F3/06 , G11B5/58 , G11B5/012 , G11B5/00
CPC分类号： G11B5/59627 , G06F3/0608 , G06F3/0644 , G06F3/0689 , G11B5/012 , G11B5/4886 , G11B5/58 , G11B20/10009 , G11B20/10046 , G11B2005/0013
摘要： A method of mitigating an effect of track misregistration on read performance in a system comprising an array-reader includes determining an estimated off-track condition, selecting translation coefficients based on the estimated off-track condition, determining updated equalizer coefficients by applying the translation coefficients to native equalizer coefficients, and applying the updated equalizer coefficients to signals received from the array-reader to output a read signal.
摘要翻译：一种减轻跟踪配准对包括阵列读取器的系统中的读取性能的影响的方法包括：确定估计的偏离轨迹条件，基于估计的偏离轨迹条件选择转换系数，通过应用平移系数来确定更新的均衡器系数到原始均衡器系数，以及将更新的均衡器系数应用于从阵列读取器接收的信号，以输出读取信号。

16. 发明授权

US09099133B1 Disk drive servo control using hybrid upsample filter 有权
标题翻译：使用混合上采样滤波器的磁盘驱动器伺服控制
公开(公告)号：US09099133B1
公开(公告)日：2015-08-04
申请号：US13752693
申请日：2013-01-29
申请人： Western Digital Technologies, Inc.
发明人： Shan Tang , Lu Feng , Yanan Huang , Alexander Babinski , Min Chen , Orhan Beker
IPC分类号： G11B21/02 , G11B5/02 , G11B5/58 , G11B5/55
CPC分类号： G11B5/553 , G11B5/59622
摘要： A disk drive is disclosed comprising a disk comprising a plurality of servo tracks, wherein each servo track comprises a plurality of servo sectors, and an actuator for actuating a head over the disk in response to an actuator control signal. The servo sectors are read to generate a first sequence of control samples x[k] at a sample frequency corresponding to a frequency of the servo sectors. A hybrid upsample filter is used to upsample by a factor of N the first sequence of control samples x[k] to generate a second sequence of control samples y[ki], wherein the hybrid upsample filter provides a higher phase gain than a zero-order type upsample filter at frequencies less than one kilohertz, and approximately the same attenuation as a first-order type upsample filter around the sample frequency. The actuator control signal is generated in response to the second sequence of control samples y[ki].
摘要翻译：公开了一种磁盘驱动器，其包括包括多个伺服磁道的磁盘，其中每个伺服磁道包括多个伺服扇区，以及用于响应于致动器控制信号而将磁头驱动到磁盘上的致动器。读取伺服扇区以在对应于伺服扇区的频率的采样频率处产生第一控制样本序列x [k]。混合上采样滤波器用于以N个因子对第一个控制样本x [k]序列进行上采样，以产生第二个控制采样序列y i，其中混合上采样滤波器提供比零 - 频率小于1千赫兹的订单型上采样滤波器，以及与采样频率周围的一阶类型上采样滤波器大致相同的衰减。致动器控制信号响应于控制样本的第二序列y i而被产生。

17. 发明授权

US09075714B1 Electronic system with data management mechanism and method of operation thereof 有权
标题翻译：具有数据管理机制的电子系统及其操作方法
公开(公告)号：US09075714B1
公开(公告)日：2015-07-07
申请号：US14307345
申请日：2014-06-17
申请人： Western Digital Technologies, Inc.
发明人： Chun Sei Tsai , Carl E. Barlow , Thao Hieu Banh
IPC分类号： G11B27/36 , G11B5/58 , G06F11/07 , G11B20/18
CPC分类号： G11B20/1889
摘要： An apparatus includes: a media; a head over the media; a read channel, coupled to the head, configured to extract data from the media; control circuitry, coupled to the read channel, configured to execute a read command; and wherein the read channel is further configured to: generate, based on extracting the data from the media, a data condition indicator, and provide, for use by the control circuitry, the data and the data condition indicator.
摘要翻译：一种装置包括：媒体; 媒体头耦合到头部的读通道，被配置为从媒体提取数据; 耦合到读通道的控制电路，被配置为执行读命令; 并且其中所述读通道还被配置为：基于从所述介质提取所述数据来生成数据条件指示符，并且为所述控制电路提供所述数据和所述数据条件指示符。

18. 发明授权

US09047897B1 Lateral tape motion signal conditioning 有权
标题翻译：侧向运动信号调理
公开(公告)号：US09047897B1
公开(公告)日：2015-06-02
申请号：US14157101
申请日：2014-01-16
申请人： International Business Machines Corporation
发明人： Nhan X. Bui , Randy C. Inch , Tomoko Taketomi
IPC分类号： G11B5/584 , G11B5/58
CPC分类号： G11B5/58 , G11B5/584
摘要： Various embodiments described herein include processing of a lateral tape motion signal, caused primarily by a tape supply reel (e.g., depending on direction of tape movement). The resulting data may be used, at least in part, to determine placement of a coarse actuator. In one general embodiment, a method includes receiving a signal representative of a lateral position of a magnetic head, and integrating portions of the signal representative of a lateral position of a magnetic head, the portions corresponding to fractions of one or more revolutions of a supply reel for generating first data. The first data is averaged over a value or values corresponding to one or more revolutions of the supply reel for generating second data.
摘要翻译：本文描述的各种实施例包括主要由磁带供应卷轴（例如，取决于磁带移动的方向）而引起的横向磁带运动信号的处理。所得到的数据可以至少部分地用于确定粗略致动器的放置。在一个一般实施例中，一种方法包括接收代表磁头的横向位置的信号，以及将表示磁头的横向位置的信号的部分积分起来，该部分对应于电源的一个或多个转数的分数卷轴用于生成第一数据。第一数据在对应于用于产生第二数据的供带盘的一个或多个转数的值或值上进行平均。

19. 发明授权

US09013824B1 Data storage device comprising dual read sensors and dual servo channels to improve servo demodulation 有权
标题翻译：数据存储装置包括双读取传感器和双伺服信道，以改善伺服解调
公开(公告)号：US09013824B1
公开(公告)日：2015-04-21
申请号：US14295475
申请日：2014-06-04
申请人： Western Digital Technologies, Inc.
发明人： Guoxiao Guo , Jie Yu
IPC分类号： G11B21/02 , G11B5/58 , G11B5/596
CPC分类号： G11B5/59655
摘要： A data storage device is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors, wherein each servo sector comprises a plurality of servo bursts. A head comprises a first read sensor and a second read sensor separated from the first read sensor by a cross-track spacing. A first servo channel processes a first read signal emanating from the first read sensor to generate a first position signal based on at least two servo bursts read using the first read sensor. A second servo channel processes a second read signal emanating from the second read sensor to generate a second position signal based on at least two servo bursts read using the second read sensor. A position error signal (PES) is generated based on the first position signal and the second position signal, and the head is servoed over the disk based on the PES.
摘要翻译：公开了一种数据存储设备，其包括由伺服扇区定义的多个伺服轨道的盘，其中每个伺服扇区包括多个伺服脉冲串。头包括通过交叉轨道间隔与第一读取传感器分离的第一读取传感器和第二读取传感器。第一伺服通道处理从第一读取传感器发出的第一读取信号，以基于使用第一读取传感器读取的至少两个伺服突发来产生第一位置信号。第二伺服通道处理从第二读取传感器发出的第二读取信号，以基于使用第二读取传感器读取的至少两个伺服突发来产生第二位置信号。基于第一位置信号和第二位置信号产生位置误差信号（PES），并且基于PES将磁头驱动到磁盘上。

20. 发明申请

US20140254040A1 HEAD-MEDIUM CONTACT DETECTION USING INTRODUCED HEAT OSCILLATION 审中-公开
标题翻译：使用引入的热振荡进行中间接触检测
公开(公告)号：US20140254040A1
公开(公告)日：2014-09-11
申请号：US14165906
申请日：2014-01-28
申请人： Seagate Technology LLC
发明人： Dongming Liu , Kenneth Haapala , Scott E. Ryun , Lin Zhou
IPC分类号： G11B5/58
CPC分类号： G11B5/581 , G11B5/607 , G11B5/6076
摘要： An apparatus includes a head transducer configured to interact with a magnetic recording medium and a heater configured to thermally actuate the head transducer. A thermal sensor at or near the head transducer is configured to produce a sensor signal. Circuitry is coupled to the heater and configured to cause an oscillation in heater power. The heater power oscillation causes an oscillation in the sensor signal. A detector is coupled to the thermal sensor and configured to detect head-medium contact using the oscillating sensor signal and heater power.
摘要翻译：一种装置包括：头部换能器，被配置为与磁记录介质相互作用;以及加热器，其被配置为热致动头部换能器。在头部传感器处或附近的热传感器被配置成产生传感器信号。电路耦合到加热器并且被配置为引起加热器功率的振荡。加热器功率振荡导致传感器信号的振荡。检测器耦合到热传感器并且被配置为使用振荡传感器信号和加热器功率检测头 - 介质接触。

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