公开(公告)号：US09431052B2

公开(公告)日：2016-08-30

申请号：US14749492

申请日：2015-06-24

Applicant: Marvell World Trade Ltd.

Inventor： Mats Oberg ,  Nitin Nangare

IPC: G11B5/09 ,  G11B20/10 ,  G11B5/012 ,  G11B5/49 ,  G11B5/39

CPC classification number: G11B20/10046 ,  G11B5/012 ,  G11B5/02 ,  G11B5/3964 ,  G11B5/4976 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/18

Abstract: The present disclosure describes systems and techniques relating to storage devices, such as storage devices that employ Two Dimensional Magnetic Recording (TDMR). According to an aspect of the described systems and techniques, a device includes: a first read channel to process a first input signal obtained from a Two Dimensional Magnetic Recording (TDMR) storage medium using a first read head, wherein the first read channel includes a first analog to digital converter (ADC); a second read channel to process a second input signal obtained from the TDMR, storage medium using a second read head, wherein the second read channel includes a second ADC; and a single digital timing loop (DTL) for both the first read channel and the second read channel, wherein the single DTL is configured to control interpolation of timing of sampling for the first and second ADCs.

Abstract translation: 本公开描述了与存储设备相关的系统和技术，例如采用二维磁记录（TDMR）的存储设备。 根据所描述的系统和技术的一个方面，一种设备包括：第一读取通道，用于使用第一读取头处理从二维磁记录（TDMR）存储介质获得的第一输​​入信号，其中第一读取通道包括 第一个模数转换器（ADC）; 第二读取通道，用于处理从TDMR获得的第二输入信号，使用第二读取头的存储介质，其中所述第二读取通道包括第二ADC; 以及用于第一读取通道和第二读取通道的单个数字定时循环（DTL），其中单个DTL被配置为控制第一和第二ADC的采样定时的内插。

公开(公告)号：US08902722B2

公开(公告)日：2014-12-02

申请号：US14094710

申请日：2013-12-02

Applicant: Marvell World Trade Ltd.

Inventor： Mats Oberg

IPC: G11B20/18 ,  G11B7/09

CPC classification number: G11B7/0948 ,  G11B20/1883 ,  G11B2220/20

Abstract: A counter is configured to generate counts associated with different locations, within a smallest addressable unit of data, on a storage medium of a disk drive. A detector is configured to detect a change in a property of a signal sensed from the storage medium. A controller is configured to: determine a count of the counter corresponding to a location, within a smallest addressable data unit on the storage medium, at which the change in the property of the signal sensed from the storage medium is detected, and change a response of at least one of the detector, a read channel controller of the disk drive, or a servo controller of the disk drive based on (i) the count and (ii) the counter.

Abstract translation: 计数器被配置为在磁盘驱动器的存储介质上的数据的最小可寻址单元内生成与不同位置相关联的计数。 检测器被配置为检测从存储介质感测的信号的属性的变化。 控制器被配置为：在所述存储介质上的最小可寻址数据单元内确定与所述位置对应的计数器的计数，在所述最小可寻址数据单元中检测到从所述存储介质检测到的信号的属性的变化，并且改变响应 基于（i）计数器和（ii）计数器，检测器，磁盘驱动器的读通道控制器或磁盘驱动器的伺服控制器中的至少一个。

公开(公告)号：US10896694B2

公开(公告)日：2021-01-19

申请号：US16667480

申请日：2019-10-29

Applicant: Marvell World Trade Ltd.

Inventor： Mats Oberg ,  Hao Fang

IPC: G11B5/09 ,  G11B7/1267 ,  G11B5/00

Abstract: A storage medium controller has been designed to maintain thermal stability of a heat source based on a history of heat source active/inactive durations so that a variation in spot size generated by the heat source is reduced during Heat Assisted Magnetic Recording (HAMR). The storage medium controller modulates power to the heat source based on these active/inactive durations. While the heat source is inactive, the storage medium controller increases a thermal compensation value and after the heat source is activated, the storage medium controller drives the heat source according to a current parameter proportional to the thermal compensation value. As the heat source continues being active, the storage medium controller decreases the thermal compensation value and proportional current parameter so that thermal stability of the heat source is maintained.

公开(公告)号：US09384767B2

公开(公告)日：2016-07-05

申请号：US14867302

申请日：2015-09-28

Applicant: Marvell World Trade LTD.

Inventor： Mats Oberg ,  Gregory Burd

IPC: G11B5/596 ,  G11B20/10 ,  G11B5/55

CPC classification number: G11B5/59622 ,  G11B5/5547 ,  G11B5/59611 ,  G11B5/59627 ,  G11B5/5965 ,  G11B20/10212 ,  G11B20/10305

Abstract: A system including an inter-track interference detection module and a position error signal generation module. The inter-track interference detection module determines a first inter-track interference value based on a first signal from a first sensor positioned over a first track of a rotating storage medium. The first inter-track interference value indicates energy contributed by tracks adjacent to the first track compared to energy contributed by the first track. The inter-track interference detection module determines a second inter-track interference value based on a second signal from a second sensor positioned over a second track of the rotating storage medium. The second inter-track interference value indicates energy contributed by tracks adjacent to the second track compared to energy contributed by the second track. The position error signal generation module generates a position error signal based on the first inter-track interference value and the second inter-track interference value.

Abstract translation: 一种包括轨道间干扰检测模块和位置误差信号生成模块的系统。 轨道间干扰检测模块基于位于旋转存储介质的第一轨道上的第一传感器的第一信号来确定第一轨道间干扰值。 第一轨道间干扰值表示与由第一轨道贡献的能量相比，与第一轨道相邻的轨道所贡献的能量。 轨道间干扰检测模块基于位于旋转存储介质的第二轨道上的第二传感器的第二信号来确定第二轨道间干扰值。 第二轨道间干扰值指示与由第二轨道贡献的能量相比较的与第二轨道相邻的轨道所贡献的能量。 位置误差信号产生模块基于第一轨道间干扰值和第二轨道间干扰值产生位置误差信号。

公开(公告)号：US09147419B2

公开(公告)日：2015-09-29

申请号：US14499819

申请日：2014-09-29

Applicant: Marvell World Trade Ltd.

Inventor： Mats Oberg ,  Gregory Burd

IPC: G11B5/596 ,  G11B20/10 ,  G11B5/55

CPC classification number: G11B5/59622 ,  G11B5/5547 ,  G11B5/59611 ,  G11B5/59627 ,  G11B5/5965 ,  G11B20/10212 ,  G11B20/10305

Abstract: A hard disk drive circuit includes first and second inter-track interference detection modules. The first inter-track interference detection module is configured to generate a first measured inter-track interference value based on a first read signal from a first read sensor positioned over a magnetic medium. The second inter-track interference detection module is configured to generate a second measured inter-track interference value based on a second read signal from a second read sensor positioned over the magnetic medium. A position error signal generation module is configured to generate a position error signal based on the first measured inter-track interference value and the second measured inter-track interference value. An arm control module is configured to control rotation of an arm in response to the position error signal. The first read sensor and the second read sensor are located at a distal end of the arm.

Abstract translation: 硬盘驱动电路包括第一和第二轨道间干扰检测模块。 第一轨道间干扰检测模块被配置为基于位于磁介质上的第一读取传感器的第一读取信号产生第一测量的轨道间干扰值。 第二轨道间干扰检测模块被配置为基于位于磁介质上的第二读取传感器的第二读取信号产生第二测量的轨道间干扰值。 位置误差信号生成模块被配置为基于第一测量的轨道间干扰值和第二测量的轨道间干扰值来产生位置误差信号。 臂控制模块被配置为响应于位置误差信号来控制臂的旋转。 第一读取传感器和第二读取传感器位于臂的远端。

公开(公告)号：US20150092296A1

公开(公告)日：2015-04-02

申请号：US14482124

申请日：2014-09-10

Applicant: Marvell World Trade Ltd.

Inventor： Mats Oberg ,  Qiyue Zou ,  Gregory Burd

IPC: G11B5/596

CPC classification number: G11B5/59627 ,  G11B5/4886 ,  G11B5/553 ,  G11B5/59683

Abstract: Determining the radial position of a first read head of a storage device includes reading servo data from a storage media platter surface using the first read head, deriving from that servo data a first positron error signal representing a first estimate of the radial position of the first read head, reading the servo data from the storage media platter surface using a different read head, deriving from that servo data a second position error signal representing an estimate of the radial position of the different read head, and combining the first estimate of the radial position of the first read head and the estimate of the radial position of the different read head to obtain a revised estimate of the radial position of the first read head. The combining could include taking account of a known positional offset between the first read head and the different read head.

Abstract translation: 确定存储设备的第一读取头的径向位置包括使用第一读取头从存储媒体盘片表面读取伺服数据，从该伺服数据中导出表示第一和第二读取头的径向位置的第一估计的第一正电子误差信号 读取头，使用不同的读取头从存储介质盘表面读取伺服数据，从该伺服数据导出表示不同读取头的径向位置的估计的第二位置误差信号，并组合径向的第一估计 第一读取头的位置和不同读取头的径向位置的估计，以获得第一读取头的径向位置的修正估计。 组合可以包括考虑第一读头和不同读头之间的已知位置偏移。

公开(公告)号：US08599666B2

公开(公告)日：2013-12-03

申请号：US13669218

申请日：2012-11-05

Applicant: Marvell World Trade Ltd.

Inventor： Mats Oberg

IPC: G11B20/18

CPC classification number: G11B7/0948 ,  G11B20/1883 ,  G11B2220/20

Abstract: A change in a property of a signal is detected, the signal having been sensed from a storage medium by a disk drive. A count is determined, the count corresponding to a first location on the storage medium at which the change in the property of the signal sensed from the storage medium is detected. The count is used to predict a second location on the storage medium corresponding to the change in the property of the signal sensed from the storage medium. Relative to the first location on the storage medium, the second location on the storage medium is closer to an actual location of a feature on the storage medium that causes the change in the property of the signal sensed from the storage medium.

Abstract translation: 检测到信号的特性的改变，该信号已由磁盘驱动器从存储介质感测到。 确定对应于存储介质上的从存储介质检测到的信号的属性的变化被检测到的第一位置的计数。 该计数用于预测对应于从存储介质感测的信号的性质变化的存储介质上的第二位置。 相对于存储介质上的第一位置，存储介质上的第二位置更接近存储介质上的特征的实际位置，其导致从存储介质感测的信号的属性的改变。

公开(公告)号：US20150380048A1

公开(公告)日：2015-12-31

申请号：US14749492

申请日：2015-06-24

Applicant: Marvell World Trade Ltd.

Inventor： Mats Oberg ,  Nitin Nangare

IPC: G11B20/10

CPC classification number: G11B20/10046 ,  G11B5/012 ,  G11B5/02 ,  G11B5/3964 ,  G11B5/4976 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/18

Abstract: The present disclosure describes systems and techniques relating to storage devices, such as storage devices that employ Two Dimensional Magnetic Recording (TDMR). According to an aspect of the described systems and techniques, a device includes: a first read channel to process a first input signal obtained from a Two Dimensional Magnetic Recording (TDMR) storage medium using a first read head, wherein the first read channel includes a first analog to digital converter (ADC); a second read channel to process a second input signal obtained from the TDMR, storage medium using a second read head, wherein the second read channel includes a second ADC; and a single digital timing loop (DTL) for both the first read channel and the second read channel, wherein the single DTL is configured to control interpolation of timing of sampling for the first and second ADCs.

Abstract translation: 本公开描述了与存储设备相关的系统和技术，例如采用二维磁记录（TDMR）的存储设备。 根据所描述的系统和技术的一个方面，一种设备包括：第一读取通道，用于使用第一读取头处理从二维磁记录（TDMR）存储介质获得的第一输​​入信号，其中第一读取通道包括 第一个模数转换器（ADC）; 第二读取通道，用于处理从TDMR获得的第二输入信号，使用第二读取头的存储介质，其中所述第二读取通道包括第二ADC; 以及用于第一读取通道和第二读取通道的单个数字定时循环（DTL），其中单个DTL被配置为控制第一和第二ADC的采样定时的内插。

公开(公告)号：US09191031B2

公开(公告)日：2015-11-17

申请号：US14617070

申请日：2015-02-09

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Mats Oberg ,  Jin Xie

IPC: H03M13/00 ,  G11C29/00 ,  H03M13/29 ,  H03M13/05 ,  G11B20/18 ,  G06F11/10

CPC classification number: H03M13/29 ,  G06F11/1076 ,  G11B20/1813 ,  G11B20/1833 ,  H03M13/05

Abstract: Aspects of the disclosure provide a circuit that includes a decoder, an error checking module, and a controller. The decoder is configured to receive codewords, and decode the codewords based on an error correcting code. The error checking module is configured to error-check sectors using an error detecting code in the sectors. Each sector is formed of a plurality of decoded codewords. The controller is configured to store in a memory, when the error checking fails for at least one sector, the decoded codewords and corresponding flags indicative of pass or fail of the decoding of the codewords.

Abstract translation: 本公开的方面提供了包括解码器，错误检查模块和控制器的电路。 解码器被配置为接收码字，并且基于纠错码解码码字。 错误检查模块被配置为使用扇区中的错误检测代码错误检查扇区。 每个扇区由多个解码码字组成。 控制器被配置为在至少一个扇区的错误检查失败时存储在存储器中，解码的码字和指示码字的解码的通过或失败的相应标志。

公开(公告)号：US20140189467A1

公开(公告)日：2014-07-03

申请号：US14202055

申请日：2014-03-10

Applicant: Marvell World Trade LTD.

Inventor： Mats Oberg ,  Jin Xie

IPC: G11B20/18

CPC classification number: G11B20/1833 ,  G11B20/1866 ,  G11B2020/1846 ,  H03M13/2954

Abstract: A decoder including a decode module, a matrix module, and a marking module. The decode module receives data and performs a first decoding iteration to decode the data. The first decoding iteration includes generating a first matrix having a first byte. The matrix module generates a second matrix based on the first matrix. The second matrix includes the first and second bytes. The second byte is adjacent and sequentially prior or subsequent to the first byte. The marking module: determines whether the first byte has been correctly decoded; based on determining whether the first byte has been correctly decoded, determines a status of the second byte; and based on the status of the second byte, marks the first byte as an erasure. The decode module, based on the second byte being marked as an erasure, corrects the second byte during the second decoding iteration.

Abstract translation: 解码器，包括解码模块，矩阵模块和标记模块。 解码模块接收数据并执行第一解码迭代来解码数据。 第一解码迭代包括生成具有第一字节的第一矩阵。 矩阵模块基于第一矩阵生成第二矩阵。 第二矩阵包括第一和第二字节。 第二个字节在第一个字节之前或之后是相邻的。 标记模块：确定第一个字节是否已正确解码; 基于确定所述第一字节是否被正确解码，确定所述第二字节的状态; 并且基于第二字节的状态，将第一个字节标记为擦除。 解码模块基于第二字节被标记为擦除，在第二解码迭代期间校正第二字节。