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1. 发明授权

US10867632B2 Shingled magnetic recording device capable of recording position error on non-volatile memory 有权
公开(公告)号：US10867632B2
公开(公告)日：2020-12-15
申请号：US16569210
申请日：2019-09-12
申请人： Kabushiki Kaisha Toshiba , Toshiba Electronic Devices & Storage Corporation
发明人： Yu Yamamoto , Makoto Asakura
IPC分类号： G11B20/10 , G11B5/012 , G11B5/596 , G11B20/18 , G11B19/04 , G11B5/54
CPC分类号： G11B20/10388 , G11B5/012 , G11B5/54 , G11B5/596 , G11B5/59627 , G11B5/59638 , G11B5/59688 , G11B19/044 , G11B19/045 , G11B20/18
摘要： According to one embodiment, a magnetic disk device includes a disk, a head that writes data to the disk and reads data from the disk, and a controller that overwrites a second track on a first track in a first track group, and records a maximum first positioning error in a first direction from the first track to the second track in the first track in a nonvolatile first recording area.

2. 发明授权

US10504550B2 Magnetic disk device configured to write parity data that is based on data being written to a parity sector when no error is detected in writing the data being written 有权
公开(公告)号：US10504550B2
公开(公告)日：2019-12-10
申请号：US16120290
申请日：2018-09-02
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
发明人： Syosuke Maruyama , Kana Furuhashi , Yosuke Kondo
IPC分类号： G11B19/04 , G11B20/00
CPC分类号： G11B19/045 , G11B20/00615 , G11B20/00927 , G11B19/04 , G11B19/041 , G11B20/0063 , G11B20/0092
摘要： A magnetic disk device includes a plurality of tracks and a controller. The controller receives write data to be written to a first sector of a track, generates a first data string based on the write data and a logical identifier for the first sector, attempts to cause the first data string to be written to the first sector, determines whether a write error has occurred while the first data string is written to the first sector, generates a second data string based at least in part on the first data string, and in response to determining that no write error has occurred while the first data string is written to the first sector, writes a parity data string that is based at least in part on the second data string to a second sector of the track that stores parity data for the track.

3. 发明授权

US10020017B2 Hard disk drive and head positioning method 有权
公开(公告)号：US10020017B2
公开(公告)日：2018-07-10
申请号：US14975366
申请日：2015-12-18
申请人： Kabushiki Kaisha Toshiba
发明人： Takao Furuhashi
IPC分类号： G11B19/04 , G11B5/596
CPC分类号： G11B19/045 , G11B5/59611 , G11B5/59627
摘要： According to one embodiment, a hard disk drive includes a disk including a plurality of data areas, and a plurality of servo areas between the plurality of data areas, an arm holding a write head and a read arm, and a positioning module which positions the read head or the write head by rotating the arm, wherein the positioning module positioning the write head by positioning the read head, and adjusting a position of the read head or the write head, based on an output of the read head located in a data area between two servo areas adjacent in a peripheral direction, of the plurality of servo areas.

4. 发明授权

US09064526B1 Magnetic disk apparatus and off-track detection method 有权
标题翻译：磁盘装置和离轨检测方法
公开(公告)号：US09064526B1
公开(公告)日：2015-06-23
申请号：US14464511
申请日：2014-08-20
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Takayuki Kawabe , Takeyori Hara
IPC分类号： G11B19/04 , G11B27/36 , G11B5/596
CPC分类号： G11B19/04 , G11B5/59627 , G11B5/59655 , G11B19/045 , G11B19/048 , G11B27/36
摘要： In a disk drive apparatus, there is provided with a controller which determines a demodulated positioning error from a demodulated position and a target position, wherein the demodulated position is obtained by demodulating a servo signal readout from the disk. The controller estimates a demodulation noise amount which is included in the demodulated position on the basis of a signal quality of the servo signal, and corrects a predetermined off-track threshold with a correction value which is obtained from the estimated demodulation noise amount. A write operation of writing data on the disk is inhibited, if the demodulated positioning error exceeds the corrected off-track threshold.
摘要翻译：在磁盘驱动装置中，设置有从解调位置和目标位置确定解调的定位误差的控制器，其中通过解调从盘读出的伺服信号来获得解调位置。控制器基于伺服信号的信号质量估计包含在解调位置中的解调噪声量，并用从估计的解调噪声量获得的校正值来校正预定的偏离磁道阈值。如果解调的定位误差超过了校正的偏离轨道阈值，则禁止在盘上写入数据的写入操作。

5. 发明授权

US08913338B1 Disk drive reducing write unsafe threshold when detecting an unrecoverable servo compensation value 有权
标题翻译：当检测到不可恢复的伺服补偿值时，磁盘驱动器减少写入不安全阈值
公开(公告)号：US08913338B1
公开(公告)日：2014-12-16
申请号：US13924791
申请日：2013-06-24
申请人： Western Digital Technologies, Inc.
发明人： Alain Chahwan , Yanan Huang , Chuanwen Ji
IPC分类号： G11B19/04 , G11B5/596
CPC分类号： G11B19/045 , G11B5/59627 , G11B5/59688
摘要： A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors, wherein each servo sector comprises servo data and a servo compensation value. While servoing a head over a target data track during a write operation, a position error signal (PES) is generated at each servo sector based at least in part on the servo data. When the servo compensation value of a first servo sector is recoverable, the write operation is aborted when the PES generated at the first servo sector exceeds a first write unsafe threshold. When the servo compensation value of the first servo sector is unrecoverable, the write operation is aborted when the PES generated at the first servo sector exceeds a second write unsafe threshold less than the first write unsafe threshold.
摘要翻译：公开了一种磁盘驱动器，其包括由伺服扇区定义的多个伺服磁道的盘，其中每个伺服扇区包括伺服数据和伺服补偿值。当在写入操作期间在目标数据轨道上伺服头部时，至少部分地基于伺服数据在每个伺服扇区处产生位置误差信号（PES）。当第一伺服扇区的伺服补偿值可恢复时，当在第一伺服扇区处产生的PES超过第一写不安全阈值时，写操作被中止。当第一伺服扇区的伺服补偿值不可恢复时，当在第一伺服扇区处产生的PES超过低于第一写不安全阈值的第二写不安全阈值时，写操作被中止。

6. 发明授权

US08891195B1 Method and system for compensating for track squeeze 有权
标题翻译：轨道挤压补偿方法及系统
公开(公告)号：US08891195B1
公开(公告)日：2014-11-18
申请号：US14096274
申请日：2013-12-04
申请人： Marvell International Ltd.
发明人： Gregory Burd , Nitin Nangare
IPC分类号： G11B5/596 , G11B27/36 , G11B5/02 , G11B20/18 , G11B20/10
CPC分类号： G11B20/10046 , G11B5/012 , G11B5/09 , G11B19/044 , G11B19/045 , G11B20/18
摘要： A storage device includes a storage medium having a plurality of tracks of data. Reading apparatus for reading a current track of data that has been subject to previous encroachment to an extent from at least one adjacent track of data includes a write head that writes interfering data to the adjacent track of data while intentionally encroaching at least to that extent onto the current track of data, and circuitry that recovers data on the current track of data using the interfering data. A method for reading a current track of data, that has been subject to previous encroachment to an extent from at least one adjacent track of data, includes writing interfering data to the adjacent track of data while intentionally encroaching at least to that extent onto the current track of data, and recovering data on the current track of data using the interfering data.
摘要翻译：存储装置包括具有多个数据轨迹的存储介质。用于读取已经受到来自至少一个相邻数据轨道的先前侵占的数据的当前轨迹的读取装置包括写入头，其将干扰数据写入数据的相邻轨道，同时至少有意地侵入到数据的当前轨迹以及使用干扰数据恢复当前数据轨迹上的数据的电路。一种用于读取当前数据轨迹的方法，该方法已经受到来自至少一个相邻数据轨迹的一定程度的先前侵扰，包括将干扰数据写入相邻的数据轨道，同时至少在这种程度上侵蚀到当前跟踪数据，并使用干扰数据恢复当前数据轨迹上的数据。

7. 发明授权

US08879181B2 Read/write apparatus and read/write method 有权
标题翻译：读/写设备和读/写方式
公开(公告)号：US08879181B2
公开(公告)日：2014-11-04
申请号：US13735220
申请日：2013-01-07
申请人： Kabushiki Kaisha Toshiba
发明人： Seiji Toda , Michio Yamamoto , Masakazu Kitahara , Masataka Shitara , Takumi Kakuya , Kiyotaka Sasaki , Isao Fujita , Satoru Adachi , Kenji Inoue , Nobuhiro Sugawara , Hironori Kanno
IPC分类号： G11B27/36 , G11B19/04 , G11B5/012 , G11B20/18
CPC分类号： G11B5/012 , G11B19/045 , G11B20/1879 , G11B27/36
摘要： According to one embodiment, a read/write apparatus includes a receiver and a refresh module. The receiver receives a write command requesting a write to a magnetic disk. The refresh module refreshes, when a first area of the magnetic disk includes a second area corresponding to the write command, data written in a third area, the third area being an area obtained by excluding the second area from the first area.
摘要翻译：根据一个实施例，读/写装置包括接收器和刷新模块。接收器接收写入命令，请求写入磁盘。刷新模块刷新，当磁盘的第一区域包括对应于写入命令的第二区域时，写入第三区域的数据，第三区域是通过从第一区域排除第二区域而获得的区域。

8. 发明授权

US08854751B2 Reducing errors resulting from width variability of storage media write tracks 有权
标题翻译：减少由存储介质写入磁道宽度变化导致的错误
公开(公告)号：US08854751B2
公开(公告)日：2014-10-07
申请号：US12985946
申请日：2011-01-06
申请人： Bernardo Rub
发明人： Bernardo Rub
IPC分类号： G11B27/36 , G11B5/02 , G11B5/012 , G11B19/04 , G11B20/18 , G11B20/10
CPC分类号： G11B5/012 , G11B19/045 , G11B20/10388 , G11B20/1816 , G11B20/1833 , G11B20/1879 , G11B2020/183 , G11B2220/2516
摘要： Various approaches that reduce the width variability of storage media data tracks are described. First and second data tracks are written so that the second track overlaps the first track. After writing the second track data to the second track, an effective width of the first track is determined. The effective width of the first track is the portion of the first track that is not overlapped by the second track. One or more additional write operations to the recording medium are performed to compensate for the effective width of the first track being less than a threshold. The additional write operations may include one or more of rewriting the first track data to a third track on the storage medium and writing additional redundancy information to supplement the coding of the first track data.
摘要翻译：描述减少存储介质数据轨道的宽度变化性的各种方法。写入第一和第二数据轨道，使得第二轨道与第一轨道重叠。在将第二轨道数据写入第二轨道之后，确定第一轨道的有效宽度。第一轨道的有效宽度是第一轨道的不与第二轨道重叠的部分。执行对记录介质的一个或多个附加写入操作以补偿第一轨道的有效宽度小于阈值。附加写入操作可以包括将第一轨道数据重写到存储介质上的第三轨道中的一个或多个，并且写入附加冗余信息以补充第一轨道数据的编码。

9. 发明授权

US08810938B1 Systems and methods for performing timing acquisition on an expected preamble of a read signal 有权
标题翻译：用于对读取信号的预期前导码执行定时获取的系统和方法
公开(公告)号：US08810938B1
公开(公告)日：2014-08-19
申请号：US14230720
申请日：2014-03-31
申请人： Marvell International Ltd.
发明人： Michael Madden , Gregory Burd
IPC分类号： G11B5/02
CPC分类号： G11B20/10046 , G11B5/09 , G11B19/045 , G11B20/10222 , G11B20/1217
摘要： A system including a read/write channel module and a data processing module. The read/write channel module is configured to sample a read signal corresponding to data read from a disk. The data processing module is configured to determine a first track of the disk. A first preamble of the first track is encoded to include a first timing recovery pattern, a second preamble of a second track of the disk is encoded to include a second timing recovery pattern, and a first period of the first timing recovery pattern is different than a second period of the second timing recovery pattern. The data processing module is further configured to determine an expected preamble and process the read signal to remove inter track interference from the read signal based on the expected preamble and an expected difference between the first period and the second period.
摘要翻译：一种包括读/写通道模块和数据处理模块的系统。读/写通道模块被配置为对与从盘读取的数据相对应的读取信号进行采样。数据处理模块被配置为确定盘的第一轨道。第一轨道的第一前导码被编码为包括第一定时恢复模式，盘的第二轨道的第二前导码被编码为包括第二定时恢复模式，并且第一定时恢复模式的第一周期不同于第二定时恢复模式的第二周期。数据处理模块还被配置为基于预期的前导码和第一周期与第二周期之间的预期差异来确定预期的前同步码并处理读取信号以从读取信号中去除帧间干扰。

10. 发明申请

US20140071559A1 READ/WRITE APPARATUS AND READ/WRITE METHOD 有权
标题翻译：读/写装置和读/写方法
公开(公告)号：US20140071559A1
公开(公告)日：2014-03-13
申请号：US13735220
申请日：2013-01-07
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Seiji TODA , Michio YAMAMOTO , Masakazu KITAHARA , Masataka SHITARA , Takumi KAKUYA , Kiyotaka SASAKI , Isao FUJITA , Satoru ADACHI , Kenji INOUE , Nobuhiro SUGAWARA , Hironori KANNO
IPC分类号： G11B5/012
CPC分类号： G11B5/012 , G11B19/045 , G11B20/1879 , G11B27/36
摘要： According to one embodiment, a read/write apparatus includes a receiver and a refresh module. The receiver receives a write command requesting a write to a magnetic disk. The refresh module refreshes, when a first area of the magnetic disk includes a second area corresponding to the write command, data written in a third area, the third area being an area obtained by excluding the second area from the first area.
摘要翻译：根据一个实施例，读/写装置包括接收器和刷新模块。接收器接收写入命令，请求写入磁盘。刷新模块刷新，当磁盘的第一区域包括与写入命令对应的第二区域时，写入第三区域的数据，第三区域是通过从第一区域排除第二区域而获得的区域。

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