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1. 发明授权

US09159369B1 MR-offset change detection and compensation 有权
标题翻译： MR偏移变化检测和补偿
公开(公告)号：US09159369B1
公开(公告)日：2015-10-13
申请号：US14640852
申请日：2015-03-06
申请人： Seagate Technology LLC
发明人： Xiong Liu , ChengYi Guo , Jui Jing Lim , HtayNwe Aung
IPC分类号： G11B27/36 , G11B5/455 , G11B20/18 , G11B5/596 , G11B5/55
CPC分类号： G11B27/36 , G11B5/455 , G11B5/5565 , G11B5/59627 , G11B5/59672 , G11B5/59694 , G11B20/182
摘要： A method, computer-readable medium, and storage device for detecting and compensating for a change in MR-offset in a disk-based storage device. A pattern is written to a track on a disk of the storage device utilizing a read/write head. The read channel of the storage device is then configured as a harmonic sensor and the pattern is read from the track at a specific off-track position of the read/write head. The magnitude of the harmonic sensor is measured during the read, and the change in MR-offset is calculated for the read/write head based on the measured magnitude value and a predetermined transfer function between off-track amount and harmonic sensor magnitude. The change in MR-offset may then be utilized by a servo mechanism of the storage device to correct head positioning during a write operation for the read/write head.
摘要翻译：一种用于检测和补偿基于磁盘的存储设备中MR偏移的变化的方法，计算机可读介质和存储设备。使用读/写头将模式写入存储设备的盘上的轨道。然后将存储装置的读取通道配置为谐波传感器，并且在读/写头的特定离轨位置从轨道读取图案。在读取期间测量谐波传感器的幅度，并且基于所测量的幅度值和偏移量与谐波传感器幅度之间的预定传递函数，针对读/写头计算MR偏移的变化。然后可以由存储装置的伺服机构利用MR偏移的改变来在读/写头的写入操作期间校正头定位。

2. 发明授权

US08873183B2 Disk drive and method of writing servo write tracks to a disk 有权
标题翻译：将磁盘驱动器和将伺服写入磁道写入磁盘的方法
公开(公告)号：US08873183B2
公开(公告)日：2014-10-28
申请号：US12963580
申请日：2010-12-08
申请人： Kei Yasuna , Tomoo Ozaki , Makoto Takase , Takao Horiguchi
发明人： Kei Yasuna , Tomoo Ozaki , Makoto Takase , Takao Horiguchi
IPC分类号： G11B5/596
CPC分类号： G11B5/59633 , G11B5/59666 , G11B5/59672
摘要： A system and method of writing servo write tracks to a rotating disk using a head having a read/write offset is disclosed. One embodiment utilizes a write element on the head to write the servo write tracks. A read element on the head is then positioned over the servo write tracks. The phase of a specific frequency component of the track shape error in the servo write track is measured during the positioning of the read element over the servo write track. A sine wave having a specific frequency and a phase is selected based on the measurement results. The sine wave is then applied to a servo system as a correction signal. A new servo write track is then written with the write element.
摘要翻译：公开了一种使用具有读/写偏移量的磁头将伺服写轨迹写入旋转磁盘的系统和方法。一个实施例利用头上的写入元件来写入伺服写入轨迹。然后将磁头上的读取元件定位在伺服写入磁道上。伺服写入磁道中的磁道形状误差的特定频率分量的相位在读取元件在伺服写入磁道上的定位期间被测量。基于测量结果选择具有特定频率和相位的正弦波。然后将正弦波作为校正信号施加到伺服系统。然后用写入元件写入新的伺服写入轨迹。

3. 发明授权

US07518819B1 Disk drive rewriting servo sectors by writing and servoing off of temporary servo data written in data sectors 失效
标题翻译：磁盘驱动器通过写入和伺服关闭写入数据扇区的临时伺服数据来重写伺服扇区
公开(公告)号：US07518819B1
公开(公告)日：2009-04-14
申请号：US11849029
申请日：2007-08-31
申请人： Jie Yu , Guoxiao Guo , Jack M. Chue
发明人： Jie Yu , Guoxiao Guo , Jack M. Chue
IPC分类号： G11B21/02 , G11B27/36
CPC分类号： G11B5/59633 , G11B5/59627 , G11B5/59666 , G11B5/59672 , G11B20/1258 , G11B20/18 , G11B2020/1281 , G11B2220/2516
摘要： A disk drive is disclosed comprising a disk having a plurality of tracks, wherein each track comprises a plurality of data sectors and a plurality of servo sectors. The disk drive further comprises a head actuated over the disk, the head comprising a read element radially offset from a write element by a reader/writer offset. In order to rewrite a marginal servo sector detected in a target track, control circuitry within the disk drive relocates user data recorded in a first data sector of a near adjacent track to a staging memory. Servo data is written over the first data sector, and the read element is used to read the servo data written over the first data sector to actuate the head to rewrite the marginal servo sector of the target track. The user data stored in the staging memory is then rewritten to the first data sector.
摘要翻译：公开了一种磁盘驱动器，其包括具有多个磁道的磁盘，其中每个磁道包括多个数据扇区和多个伺服扇区。磁盘驱动器还包括在磁盘上致动的磁头，磁头包括读/写偏移量从写入元件径向偏移的读取元件。为了重写在目标轨道中检测到的边缘伺服扇区，磁盘驱动器内的控制电路将记录在邻近轨道的第一数据扇区中的用户数据重新定位到分段存储器。将伺服数据写入第一数据扇区，读取元件用于读取通过第一数据扇区写入的伺服数据，以驱动磁头来重写目标磁道的边缘伺服扇区。存储在分段存储器中的用户数据然后被重写到第一数据扇区。

4. 发明授权

US6049437A Apparatus for providing new servo information on a disk without entirely erasing old servo information 失效
标题翻译：用于在盘上提供新的伺服信息而不完全擦除旧的伺服信息的装置
公开(公告)号：US6049437A
公开(公告)日：2000-04-11
申请号：US808080
申请日：1997-02-28
申请人： William E. Wevers
发明人： William E. Wevers
IPC分类号： G11B5/012 , G11B5/55 , G11B5/596 , G11B21/10 , G11B5/09
CPC分类号： G11B21/106 , G11B5/59688 , G11B5/012 , G11B5/5534 , G11B5/59644 , G11B5/59672
摘要： The present invention is a method and apparatus for rewriting servo information on a disk of a hard disk drive. The old servo data is erased after the new servo data has been written, using a stagger erase method. A disk pack having n sides is provided, where each of the n sides has a plurality of tracks, and each side is divided into a plurality of sectors. A first set of servo information is written on an nth sector of a track on an nth side of said disk pack. This step is repeated for n=1 through n, for every sector of the track for each side of the disk pack. Next, data is erased from one of every n sectors of the track on each side of said disk pack. The entire process is repeated for a predetermined number of tracks on each side of the disk pack. In an alternate embodiment, the data is erased from a first track while the read/write heads of the hard disk drive are being moved from the first track to a second track.
摘要翻译：本发明是一种在硬盘驱动器的盘上重写伺服信息的方法和装置。新的伺服数据写入后，使用错位擦除方法擦除旧的伺服数据。提供一种具有n个侧面的磁盘组，其中n个侧面中的每一个具有多个磁道，并且每个侧面被分成多个扇区。第一组伺服信息被写在所述磁盘组的第n侧的磁道的第n个扇区上。对于n = 1到n重复该步骤，对于磁盘组的每一侧的磁道的每个扇区。接下来，从所述磁盘组的每一侧的轨道的每n个扇区之一擦除数据。在磁盘组的每一侧上的预定数量的磁道重复整个过程。在替代实施例中，当硬盘驱动器的读/写头从第一轨道移动到第二轨道时，数据从第一轨道擦除。

5. 发明授权

US09837114B1 Disk device and method for manufacturing disk device 有权
公开(公告)号：US09837114B1
公开(公告)日：2017-12-05
申请号：US15449487
申请日：2017-03-03
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Kazuhiko Takaishi
IPC分类号： G11B7/00 , G11B21/02 , G11B20/10 , G11B5/596
CPC分类号： G11B20/10027 , G11B5/59633 , G11B5/59672
摘要： A method for manufacturing a disk device includes the steps of measuring a first gain of a control signal of a fine motion actuator while positioning a head to a first radial position of a disk medium using a coarse motion actuator but not the fine motion actuator, based on an auxiliary servo pattern recorded on the disk medium, measuring a second gain of a control signal of the fine motion actuator while positioning the head to a second radial position of the disk medium using the coarse motion actuator but not the fine motion actuator, based on the auxiliary servo pattern recorded on the disk medium, and determining gain correction values which are to be applied to a control signal for the fine motion actuator while performing servo pattern writing on the disk medium, based on the first and second gains.

6. 发明申请

US20160275977A1 Servo Write Control Apparatus and Method, and Magnetic Disk Apparatus 审中-公开
标题翻译：伺服写控制装置和方法以及磁盘装置
公开(公告)号：US20160275977A1
公开(公告)日：2016-09-22
申请号：US15066343
申请日：2016-03-10
申请人： Kabushiki Kaisha Toshiba
发明人： Shigen YASUNAKA , Shinji TAKAKURA
IPC分类号： G11B5/596
CPC分类号： G11B5/59655 , G11B5/59666 , G11B5/59672
摘要： According to one embodiment, a servo write control apparatus is for a disk apparatus including a read element and a write element located in an outer side of a disk from the read element. The servo write control apparatus detects a plurality of first burst signals recorded in a circumferential direction of the disk by the read element. The servo write control apparatus calculates an offset in a radial direction when the write element writes a second burst signal, based on amplitude values of at least two of the first burst signals used for positioning the read element. The servo write control apparatus adjusts a write position of the second burst signal based on the offset.
摘要翻译：根据一个实施例，伺服写入控制装置用于包含读取元件和位于盘的外侧的读取元件的写入元件的盘装置。伺服写入控制装置通过读取的元件检测在盘的圆周方向记录的多个第一突发信号。伺服写入控制装置基于用于定位读取元件的第一突发信号中的至少两个的振幅值，在写入元件写入第二突发信号时计算径向偏移。伺服写入控制装置基于偏移来调整第二突发信号的写入位置。

7. 发明授权

US09236074B1 Multi-disk writer with individual head positioning 有权
标题翻译：多磁盘刻录机，具有单独的头定位
公开(公告)号：US09236074B1
公开(公告)日：2016-01-12
申请号：US14605063
申请日：2015-01-26
申请人： Seagate Technology LLC
发明人： Michael R. Tiller , Barmeshwar Vikramaditya , Yongjun Hou
IPC分类号： G11B21/02 , G11B5/60
CPC分类号： G11B5/6005 , G11B5/5552 , G11B5/59638 , G11B5/59672
摘要： A system comprises a disk writer servo head and a controller. The disk writer servo head is configured to be positioned by a micro actuator. The disk writer servo head is also configured to substantially, continuously alternate between reading a first servo pattern and writing a second servo pattern until a disk is substantially, completely servo written. The first servo pattern establishes a first position of the disk writer servo head and the second servo pattern establishes a second position of the disk writer servo head. The controller is configured to control the operation of the disk writer servo head. The controller is also configured to compare the first and second positions to establish a position error. The micro actuator is configured to reposition the disk writer servo head in response to the position error prior to a next reading.
摘要翻译：系统包括盘写入器伺服头和控制器。盘写入器伺服头构造成由微致动器定位。磁盘写入器伺服磁头还构造成在读取第一伺服模式和写入第二伺服模式之间基本上连续交替，直到磁盘被完全伺服写入。第一伺服模式建立磁盘写入器伺服磁头的第一位置，第二伺服模式建立磁盘写入器伺服磁头的第二位置。控制器配置为控制磁盘写入器伺服磁头的操作。控制器还被配置为比较第一和第二位置以建立位置误差。微致动器被配置为在下次读取之前响应于位置误差来重新定位盘写入器伺服头。

8. 发明授权

US08159773B2 Method and apparatus for forming servo patterns on a magnetic-recording disk 有权
标题翻译：在磁记录盘上形成伺服图案的方法和装置
公开(公告)号：US08159773B2
公开(公告)日：2012-04-17
申请号：US12504530
申请日：2009-07-16
申请人： Xuchu Zhu , Makoto Takase , Tomoo Ozaki , Wee Hei
发明人： Xuchu Zhu , Makoto Takase , Tomoo Ozaki , Wee Hei
IPC分类号： G11B5/02
CPC分类号： G11B5/59633 , G11B5/59638 , G11B5/59672
摘要： A method for forming servo patterns on a magnetic-recording disk. The method includes moving a magnetic-recording head in an opposite direction to a pattern development direction, when there is a faulty servo pattern. The method also includes positioning a write element of the magnetic recording head on a track of the faulty servo pattern and forming a reserve servo pattern at a different circumferential location from that of the faulty servo pattern. The method includes moving the magnetic-recording head in the pattern development direction. The method further includes positioning the read element on the track of the faulty servo pattern and forming a new servo pattern in the pattern development direction at the circumferential location of the faulty servo pattern on a track disposed between the track of the faulty servo pattern and an outside diameter of the magnetic-recording disk, based on data read from the reserve servo pattern.
摘要翻译：一种用于在磁记录盘上形成伺服图案的方法。该方法包括：当存在故障伺服模式时，将磁记录头沿与图案显影方向相反的方向移动。该方法还包括将磁记录头的写元件定位在故障伺服模式的轨道上，并在与故障伺服模式不同的周向位置处形成备用伺服模式。该方法包括沿图案显影方向移动磁记录头。该方法还包括将读取的元件定位在故障伺服模式的轨道上，并且在位于故障伺服模式的轨迹之间的轨道上的故障伺服模式的圆周位置处的图案显影方向上形成新的伺服模式，基于从备用伺服模式读取的数据，磁记录盘的外径。

9. 发明授权

US09514774B1 Spiral pitch correction based on micro-jog variation 有权
标题翻译：基于微动差变化的螺旋音调校正
公开(公告)号：US09514774B1
公开(公告)日：2016-12-06
申请号：US14924630
申请日：2015-10-27
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Gabor Szita , Jiangang Liang , Anton Gerasimov
IPC分类号： G11B21/02 , G11B5/596 , G11B5/012 , G11B20/12
CPC分类号： G11B5/59666 , G11B5/012 , G11B5/59661 , G11B5/59672 , G11B5/59688 , G11B20/10009 , G11B2020/1281
摘要： During a self-servo write process, servo sectors that have uniform radial spacing are written on a disk surface. As part of the in-drive writing of the servo sectors, a radial offset between a reader element and a writer element of a magnetic head is measured. The measured radial offset, or micro-jog, is compared to a known nominal micro-jog value for the current radial position of the magnetic head. When the measured micro-jog value does not match the nominal micro-jog value, an appropriate correction to the self-servo write step size is applied to the radial spacing between the servo sectors being written. Variations from ideal servo spiral slope that are inherent in some servo spirals can be compensated for, thereby improving the uniformity of radial spacing of data tracks associated with the servo sectors.
摘要翻译：在自伺服写入过程中，具有均匀径向间隔的伺服扇区写在磁盘表面上。作为伺服扇区的驱动写入的一部分，测量读取器元件和磁头的写入器元件之间的径向偏移。将测量的径向偏移或微点动作与磁头的当前径向位置的已知标称微点动值进行比较。当测量的微步进值不符合标称微点动值时，对自动伺服写入步长的适当校正被应用于被写入的伺服扇区之间的径向间隔。可以补偿一些伺服螺旋固有的理想伺服螺旋斜率的变化，从而提高与伺服扇区相关的数据轨迹的径向间隔的均匀性。

10. 发明申请

US20110317308A1 MAGNETIC RECORDING APPARATUS 失效
标题翻译：磁记录装置
公开(公告)号：US20110317308A1
公开(公告)日：2011-12-29
申请号：US13167671
申请日：2011-06-23
申请人： Hiroyuki SUZUKI , Hiroshi KUBOTA , Masahide YATSU
发明人： Hiroyuki SUZUKI , Hiroshi KUBOTA , Masahide YATSU
IPC分类号： G11B21/24 , G11B21/02
CPC分类号： G11B5/59672 , G11B5/59627
摘要： According to one embodiment, a magnetic recording apparatus includes a magnetic recording medium for perpendicular magnetic recording system, a magnetic head including a read head to read data from the magnetic recording medium, and an actuator to actuate the magnetic head on the magnetic recording medium. The magnetic recording medium includes a first magnetic pattern recorded in a servo area by applying a magnetic field horizontally to a disk surface, and the first magnetic pattern corresponding to positioning data used for positioning the magnetic head. The magnetic recording medium further includes a second magnetic pattern recorded in the servo area by applying a magnetic field perpendicularly to the disk surface, and the second magnetic pattern corresponding to position correction data used for correcting the positioning data. The position correction data is derived from modulated original position correction data. The original position correction data is created for correcting the positioning data.
摘要翻译：根据一个实施例，磁记录装置包括用于垂直磁记录系统的磁记录介质，包括用于从磁记录介质读取数据的读头的磁头和用于致动磁记录介质上的磁头的致动器。磁记录介质包括通过向盘表面水平施加磁场而记录在伺服区域中的第一磁图案，以及对应于用于定位磁头的定位数据的第一磁图案。磁记录介质还包括通过垂直于盘表面施加磁场而记录在伺服区中的第二磁图，和与用于校正定位数据的位置校正数据相对应的第二磁图。位置校正数据从调制的原始位置校正数据导出。创建用于校正定位数据的原始位置校正数据。

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