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1. 发明授权

US09013819B1 Write clock phase tracking for magnetic recording device 有权
标题翻译：为磁记录装置写入时钟相位跟踪
公开(公告)号：US09013819B1
公开(公告)日：2015-04-21
申请号：US14311644
申请日：2014-06-23
申请人： Marvell International Ltd.
发明人： Qiyue Zou , Supaket Katchmart , Gregory Burd
IPC分类号： G11B5/09 , G11B20/10 , G11B5/00
CPC分类号： G11B20/10222 , G11B5/09 , G11B5/59616 , G11B5/746 , G11B2005/0026
摘要： Systems and techniques relating to control of magnetic recording devices are described. Such devices can contain a recording medium including magnetic data positions, servo sync marks (SSMs), and phase tracking fields (PTFs) arranged between first and second SSMs. A described technique includes producing, based on a read head's waveform from the recoding medium, a servo detect pulse indicating a SSM detection; producing, based on the waveform, a servo detect pulse that indicates a SSM detection; producing, responsive to the servo detect pulse, calibration pulses, each of the calibration pulses corresponding to a read head's passage over one of the PTFs; and controlling, responsive to the calibration pulses, adjustments of a phase of a write clock signal to align the write clock signal with at least a portion of the data positions, the adjustments being based on groups of samples of the waveform that respectively correspond to the PTFs.
摘要翻译：描述与磁记录装置的控制有关的系统和技术。这样的设备可以包含包括磁数据位置，伺服同步标记（SSM）和布置在第一和第二SSM之间的相位跟踪场（PTF）的记录介质。所描述的技术包括基于来自记录介质的读取头的波形来产生指示SSM检测的伺服检测脉冲; 基于波形产生指示SSM检测的伺服检测脉冲; 响应于伺服检测脉冲产生校准脉冲，每个校准脉冲对应于一个读取头通过一个PTF; 以及响应于所述校准脉冲控制所述写入时钟信号的相位的调整以使所述写时钟信号与所述数据位置的至少一部分对准，所述调整基于分别对应于所述数据位置的波形的采样组 PTF。

2. 发明授权

US10068589B1 Self-servo-write systems for detecting interference caused by pre-written seed wedges 有权
公开(公告)号：US10068589B1
公开(公告)日：2018-09-04
申请号：US15704724
申请日：2017-09-14
申请人： Marvell International LTD.
发明人： Supaket Katchmart , Xinyang Yang , Li Zhang , David Sue-Hong Liaw
IPC分类号： G11B5/596 , G11B5/012 , G11B20/12
摘要： A system includes a controller and a detector. The controller is configured to read servo spirals written on a magnetic surface of a disk drive. The servo spirals are written on the magnetic surface of the disk drive based on seed wedges. The seed wedges are written on the magnetic surface of the disk drive prior to writing the servo spirals on the magnetic surface of the disk drive. The controller is configured to write a servo pattern on the magnetic surface of the disk drive based on reading the servo spirals written on the magnetic surface of the disk drive. The detector is configured to detect, while reading the servo spiral written on the magnetic surface of the disk drive, interference caused by the seed wedges written on the magnetic surface of the disk drive.

3. 发明授权

US09070396B1 Method and apparatus for initial self-servo writing based on writing timing tracks on a disk 有权
标题翻译：基于在盘上写入定时轨迹的初始自伺服写入的方法和装置
公开(公告)号：US09070396B1
公开(公告)日：2015-06-30
申请号：US14531121
申请日：2014-11-03
申请人： Marvell International Ltd.
发明人： Supaket Katchmart , David Liaw , Jerome F. Richgels , Henri Sutioso
IPC分类号： G11B5/02 , G11B5/596 , G11B20/10
CPC分类号： G11B5/59666 , G11B20/10222
摘要： Embodiments of the present disclosure provide a method of self-servo writing, the method comprising actions of positionally tracking a selected timing track of a data storage disk, wherein the selected timing track has one or more timing segments; synchronizing an angular position signal to rotation of the data storage disk based on at least one of the one or more timing segments of the selected timing track; specifying servo sector positions relative to the synchronized angular position signal; writing servo sectors to the data storage disk at the specified servo sector positions relative to the synchronized angular position signal; detecting one or more positional errors in timing segments of a next timing track of the data storage disk based at least in part on the synchronized angular position signal; and accounting for the detected one or more positional errors in writing subsequent servo tracks. Other embodiments are also described.
摘要翻译：本公开的实施例提供了一种自伺服写入的方法，该方法包括对数据存储盘的选定定时轨道进行位置跟踪的动作，其中所选择的定时轨道具有一个或多个定时段; 基于所选定时轨道的一个或多个定时段中的至少一个，将角位置信号与数据存储盘的旋转同步; 指定相对于同步角位置信号的伺服扇区位置; 在相对于同步角位置信号的指定伺服扇区位置将伺服扇区写入数据存储盘; 至少部分地基于所述同步角位置信号来检测所述数据存储盘的下一定时轨道的定时段中的一个或多个位置误差; 并且考虑在写入后续伺服磁道时检测到的一个或多个位置误差。还描述了其它实施例。

4. 发明授权

US08854761B1 Method and system for specifying self-servo-write patterns 有权
标题翻译：用于指定自伺服写入模式的方法和系统
公开(公告)号：US08854761B1
公开(公告)日：2014-10-07
申请号：US14041048
申请日：2013-09-30
申请人： Marvell International Ltd.
发明人： Supaket Katchmart , David Liaw
IPC分类号： G11B5/02 , G11B21/10
CPC分类号： G11B5/59666 , G11B5/59688
摘要： A method of writing servo data to a data storage medium includes reading a servo instruction from a memory, the servo instruction comprising a control portion and a data portion, processing the servo instruction in a controller to generate a servo data pattern from the data portion based on the control portion, and transferring the servo data pattern to the data storage medium. The processing may include transforming the data portion into the servo data pattern based on the control portion. The processing also may include following a command in the control portion to use the data portion as an index to retrieve a pre-programmed servo data pattern from a pattern store. The transferring may include storing the servo data pattern in a buffer, and writing the servo data pattern from the buffer to the data storage medium.
摘要翻译：将伺服数据写入数据存储介质的方法包括从存储器读取伺服指令，伺服指令包括控制部分和数据部分，在控制器中处理伺服指令以从数据部分生成伺服数据模式并且将伺服数据模式传送到数据存储介质。该处理可以包括基于控制部分将数据部分变换成伺服数据模式。处理还可以包括跟随控制部分中的命令以使用数据部分作为索引从模式存储中检索预编程的伺服数据模式。传送可以包括将伺服数据模式存储在缓冲器中，并将伺服数据模式从缓冲器写入数据存储介质。

5. 发明授权

US08593755B1 Flying height measurement 有权
标题翻译：飞行高度测量
公开(公告)号：US08593755B1
公开(公告)日：2013-11-26
申请号：US13677184
申请日：2012-11-14
申请人： Marvell International Ltd.
发明人： Pantas Sutardja , Supaket Katchmart , Henri Sutioso , David Liaw
IPC分类号： G11B21/02
CPC分类号： G11B5/6029 , G11B5/6005
摘要： Some of the embodiments of the present disclosure provide a disk drive system comprising a disk drive system comprising a disk having a track upon a surface of the disk, the track including a first data-storing sector and a second data storing sector, and a servo sector located between the first data-storing sector and the second data-storing sector, the servo sector including a first flying height (FH) field having a predetermined pattern. Other embodiments are also described and claimed.
摘要翻译：本公开的一些实施例提供了一种磁盘驱动器系统，其包括磁盘驱动器系统，该磁盘驱动器系统包括具有在磁盘表面上的磁道的磁盘，该磁道包括第一数据存储扇区和第二数据存储扇区，以及伺服位于第一数据存储扇区和第二数据存储扇区之间的扇区，所述伺服扇区包括具有预定模式的第一飞行高度（FH）场。还描述和要求保护其他实施例。

6. 发明授权

US08705191B1 Null servo demodulation for short servo wedge in disk storage systems 有权
标题翻译：磁盘存储系统中短伺服楔的空伺服解调
公开(公告)号：US08705191B1
公开(公告)日：2014-04-22
申请号：US13893593
申请日：2013-05-14
申请人： Marvell International Ltd.
发明人： Supaket Katchmart
IPC分类号： G11B5/09 , G11B5/596
CPC分类号： G11B5/59688 , G11B5/59655
摘要： In a disk storage system, the disk may include a full null servo position error signal (“PES”) wedge, followed by a data wedge, and then a short null servo PES wedge. To improve the accuracy with which information read from the short null servo PES wedge can be used to help keep the read head centered over the information track being read, the short null servo PES wedge may include a calibration field. Information read from the calibration field can be used to compensate the subsequently read PES information in the short wedge for possible sampling phase error that may have accumulated since the full null servo PES wedge was read. This type of short null servo PES wedge also has other possible uses.
摘要翻译：在磁盘存储系统中，磁盘可以包括全零位伺服位置误差信号（“PES”）楔形，随后是数据楔形，然后是短零伺服PES楔形。为了提高从短零伺服PES楔中读出的信息可以用于帮助保持读头位于正被读取的信息轨道的中心的准确度，短零伺服PES楔可包括校准区。从校准字段读取的信息可以用于补偿短楔中随后读取的PES信息，以便可读取相对于全零伺服PES楔可能累积的可能的采样相位误差。这种类型的短零伺服PES楔也具有其他可能的用途。

7. 发明授权

US08462454B1 Null servo demodulation for short servo wedge in disk storage systems 有权
标题翻译：磁盘存储系统中短伺服楔的空伺服解调
公开(公告)号：US08462454B1
公开(公告)日：2013-06-11
申请号：US13628913
申请日：2012-09-27
申请人： Marvell International Ltd.
发明人： Supaket Katchmart
IPC分类号： G11B5/09 , G11B5/596
CPC分类号： G11B5/59688 , G11B5/59655
摘要： In a disk storage system, the disk may include a full null servo position error signal (“PES”) wedge, followed by a data wedge, and then a short null servo PES wedge. To improve the accuracy with which information read from the short null servo PES wedge can be used to help keep the read head centered over the information track being read, the short null servo PES wedge may include a calibration field. Information read from the calibration field can be used to compensate the subsequently read PES information in the short wedge for possible sampling phase error that may have accumulated since the full null servo PES wedge was read. This type of short null servo PES wedge also has other possible uses.
摘要翻译：在磁盘存储系统中，磁盘可以包括全零位伺服位置误差信号（“PES”）楔形，随后是数据楔形，然后是短零伺服PES楔形。为了提高从短零伺服PES楔中读出的信息可以用于帮助保持读头位于正被读取的信息轨道的中心的准确度，短零伺服PES楔可包括校准区。从校准字段读取的信息可以用于补偿短楔中随后读取的PES信息，以便可读取相对于全零伺服PES楔可能累积的可能的采样相位误差。这种类型的短零伺服PES楔也具有其他可能的用途。

8. 发明授权

US10276198B1 Method and apparatus for multi-channel servo demodulation 有权
公开(公告)号：US10276198B1
公开(公告)日：2019-04-30
申请号：US15849247
申请日：2017-12-20
申请人： Marvell International Ltd.
发明人： Supaket Katchmart , David Sue-Hong Liaw , Li Zhang
IPC分类号： G11B5/596 , G11B11/105 , G11B5/592
摘要： This disclosure describes apparatuses and techniques for multi-channel servo demodulation. Multiple servo demodulation channels enable additional information to be obtained during the self-servo writing process, such as relative positions of multiple read heads and tracking of multiple servo patterns. This additional information enhances accuracy for self-servo writing and can lead to higher recording densities in media drives, and thus more storage with little or no additional cost.

9. 发明授权

US08988808B1 Write clock rephase for magnetic recording device 有权
标题翻译：写磁记录装置的时钟重写
公开(公告)号：US08988808B1
公开(公告)日：2015-03-24
申请号：US14298574
申请日：2014-06-06
申请人： Marvell International Ltd.
发明人： Qiyue Zou , Supaket Katchmart , Gregory Burd
IPC分类号： G11B5/09 , G11B20/10
CPC分类号： G11B20/1024 , G11B5/59616 , G11B5/746 , G11B20/10435 , G11B2220/252
摘要： The present disclosure includes systems and techniques relating to synchronization for writing to a recording medium. According to an aspect, an apparatus includes: circuitry configured to measure a timing difference based on a servo detect pulse and a write pulse, wherein the servo detect pulse comes from a detection of servo data from a recording medium including pre-defined data positions, and wherein the write pulse comes from a write clock signal used with the recording medium; and circuitry configured to control an adjustment to a phase of the write clock signal based on the timing difference to align the write clock signal with at least a portion of the pre-defined data positions.
摘要翻译：本公开包括与用于写入记录介质的同步相关的系统和技术。根据一个方面，一种装置包括：被配置为基于伺服检测脉冲和写入脉冲来测量定时差的电路，其中伺服检测脉冲来自包括预定义数据位置的记录介质的伺服数据的检测，并且其中所述写脉冲来自与所述记录介质一起使用的写入时钟信号; 以及电路，被配置为基于所述定时差来控制对所述写时钟信号的相位的调整，以使所述写时钟信号与所述预定义数据位置的至少一部分对准。

10. 发明授权

US08760785B1 Write clock phase tracking for magnetic recording device 有权
标题翻译：为磁记录装置写入时钟相位跟踪
公开(公告)号：US08760785B1
公开(公告)日：2014-06-24
申请号：US13963800
申请日：2013-08-09
申请人： Marvell International Ltd.
发明人： Qiyue Zou , Supaket Katchmart , Gregory Burd
IPC分类号： G11B5/09
CPC分类号： G11B20/10222 , G11B5/09 , G11B5/59616 , G11B5/746 , G11B2005/0026
摘要： Synchronization technologies for disk drives are described. A described technique includes receiving a waveform produced by a read head operated with respect to a recording medium including magnetic data positions, a first servo sync mark (SSM), a second SSM, and phase tracking fields (PTFs); producing, based on the waveform, a servo detect pulse that indicates a detection of at least one of the SSMs; controlling a first adjustment of a phase of a write clock signal, the first adjustment being responsive to the servo detect pulse; producing, based on the write clock signal, samples of the waveform that correspond to the PTFs; and controlling second adjustments of the phase based on the samples to align the write clock signal with at least a portion of the data positions, the second adjustments being responsive to the PTFs, respectively.
摘要翻译：描述了磁盘驱动器的同步技术。所描述的技术包括接收由相对于包括磁数据位置的记录介质操作的读取头产生的波形，第一伺服同步标记（SSM），第二SSM和相位跟踪场（PTF）; 基于所述波形产生指示所述SSM中的至少一个的检测的伺服检测脉冲; 控制写入时钟信号的相位的第一调整，所述第一调整响应于所述伺服检测脉冲; 基于写时钟信号产生对应于PTF的波形样本; 以及基于所述采样来控制所述相位的第二调整以将所述写入时钟信号与所述数据位置的至少一部分对准，所述第二调整分别响应于所述PTF。

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