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11. 发明申请

US20140153135A1 MAGNETIC RECORDING APPARATUS HAVING VARIABLE-WIDTH TRACKS AND METHOD OF TESTING SAME 失效
标题翻译：具有可变宽度轨迹的磁记录装置及其测试方法
公开(公告)号：US20140153135A1
公开(公告)日：2014-06-05
申请号：US14175178
申请日：2014-02-07
申请人： Kabushiki Kaisha Toshiba
发明人： Masatoshi Sakurai , Kazuto Kashiwagi , Naoki Tagami
IPC分类号： G11B20/18
CPC分类号： G11B20/1816 , B82Y10/00 , G11B5/455 , G11B5/6011 , G11B5/746 , G11B19/048 , G11B27/36
摘要： According to one embodiment, there is provided a magnetic recording apparatus including a head slider including read and write elements, and a magnetic recording medium including magnetically recordable recording tracks with a width L1, a wide land track with a width L2 larger than the width L1 of the recording track, and non-recording sections with a width G1 each provided between adjacent recording tracks. The width L1 of the recording track is smaller than a bottom read width BRW of the read and write elements, and the width L2 of the wide land track is larger than the bottom read width BRW of the read and write elements.
摘要翻译：根据一个实施例，提供一种磁记录装置，其包括具有读和写元件的磁头滑块，以及包括具有宽度L1的磁性可记录记录磁道的磁记录介质，宽度L2大于宽度L1的宽的磁道轨迹以及各自设置在相邻记录轨道之间的具有宽度G1的非记录部分。记录磁道的宽度L1小于读取和写入元件的底部读取宽度BRW，并且宽焊盘磁道的宽度L2大于读取和写入元件的底部读取宽度BRW。

12. 发明申请

US20150294690A1 MAGNETIC DISK APPARATUS AND DATA RECORDING METHOD 审中-公开
标题翻译：磁盘设备和数据记录方法
公开(公告)号：US20150294690A1
公开(公告)日：2015-10-15
申请号：US14477307
申请日：2014-09-04
申请人： Kabushiki Kaisha Toshiba
发明人： Masahiro Kanamaru , Kazuto Kashiwagi , Takeyori Hara
IPC分类号： G11B27/36 , G11B20/18 , G11B20/10
CPC分类号： G11B5/59627 , G11B5/012 , G11B5/596 , G11B5/59688 , G11B19/041 , G11B20/10009 , G11B20/10305 , G11B20/10388 , G11B20/1217 , G11B20/1889 , G11B27/36 , G11B2020/10898 , G11B2020/1238 , G11B2020/1292 , G11B2020/1869
摘要： A magnetic disk apparatus of one of the embodiments stores read position dependency information on read signal quality of a data region at a first track and measures the read signal quality at a predetermined radial position in a second data region of a second track different from the first track. A positioning error of the second data region is determined based on the read position dependency information and the read signal quality at the predetermined radial position. Data is recorded in a recording target data region in a singled recording so as to prevent data written in the second data region from being overwritten by data in a recording target data region adjacent to the second data region by using the determined positioning error.
摘要翻译：实施例之一的磁盘装置将读取位置相关性信息存储在第一磁道上的数据区域的读取信号质量上，并且测量与第一磁道不同的第二磁道的第二数据区域中的预定径向位置处的读取信号质量跟踪。基于读取的位置依赖性信息和在预定径向位置处的读取信号质量来确定第二数据区域的定位误差。通过使用所确定的定位误差，将数据记录在单独记录中的记录目标数据区域中，以防止写入第二数据区域中的数据被与第二数据区域相邻的记录目标数据区域中的数据覆盖。

13. 发明授权

US09105277B1 Controller, disk drive, and read processing method 有权
标题翻译：控制器，磁盘驱动器和读取处理方法
公开(公告)号：US09105277B1
公开(公告)日：2015-08-11
申请号：US14481187
申请日：2014-09-09
申请人： Kabushiki Kaisha Toshiba
发明人： Kohsuke Harada , Akihiro Yamazaki , Nobuhiro Maeto , Kazuto Kashiwagi , Naoki Tagami , Masahiro Kanamaru , Tomokazu Okubo
IPC分类号： G11B5/02 , G11B27/36 , G11B5/012 , G11B5/596
CPC分类号： G11B5/012 , G11B20/10009 , G11B20/10046 , G11B20/10268
摘要： According to one embodiment, an equalizer is configured to obtain a noise included in a first correction signal by using a noise component of a first track and a noise interference component from a second track. The equalizer is configured to correct the first correction signal by using the obtained noise. The equalizer is configured to equalize the corrected first correction signal. The noise component of the first track is calculated based on a noise component of the first track at a first timing and a noise component of the first track at a second timing earlier than the first timing. The noise interference component from the second track is calculated based on a noise interference component from the second track at the first timing and a noise interference component from the second track at the second timing. The decoder is configured to decode the equalized first correction signal.
摘要翻译：根据一个实施例，均衡器被配置为通过使用来自第二轨道的第一轨道的噪声分量和噪声干扰分量来获得包括在第一校正信号中的噪声。均衡器被配置为通过使用所获得的噪声来校正第一校正信号。均衡器被配置为均衡校正的第一校正信号。第一轨道的噪声分量基于第一定时处的第一轨道的噪声分量和比第一定时早的第二定时处的第一轨道的噪声分量来计算。基于来自第一定时的第二轨道的噪声干扰分量和在第二定时处的来自第二轨道的噪声干扰分量来计算来自第二轨道的噪声干扰分量。解码器被配置为对均衡的第一校正信号进行解码。

14. 发明授权

US08988814B1 Storage device, controller, and recording and reproducing method 有权
标题翻译：存储设备，控制器以及记录和再现方法
公开(公告)号：US08988814B1
公开(公告)日：2015-03-24
申请号：US14475988
申请日：2014-09-03
申请人： Kabushiki Kaisha Toshiba
发明人： Kohsuke Harada , Akihiro Yamazaki , Nobuhiro Maeto , Kazuto Kashiwagi , Tomokazu Okubo , Naoki Tagami
IPC分类号： G11B5/035 , G11B5/09
CPC分类号： G11B5/09 , G11B20/10046 , G11B20/10268 , G11B20/10296 , G11B2020/185 , G11B2020/1859 , G11B2020/1863
摘要： According to one embodiment, a storage device includes a data conversion unit that coverts user data of n bits, into m three-ary symbols, a recording medium that records the symbols as a signal of any one of three levels corresponding to values of the symbols, and a Viterbi equalizer that performs equalization of the m symbols simultaneously based on a signal read from the recording medium while setting the number of states as a power of 3 and using a trellis diagram having 2n branches, and calculates 2n likelihoods.
摘要翻译：根据一个实施例，存储设备包括数据转换单元，其将n位的用户数据覆盖成m个三元符号;记录介质，其将符号记录为与符号的值对应的三个电平中的任何一个的信号以及维特比均衡器，其基于从记录介质读取的信号同时执行m个符号的均衡，同时将状态数设置为3的幂并使用具有2n个分支的网格图，并计算2n个可能性。

15. 发明授权

US08815336B2 Magnetic recording medium manufacturing method 有权
标题翻译：磁记录介质制造方法
公开(公告)号：US08815336B2
公开(公告)日：2014-08-26
申请号：US13658658
申请日：2012-10-23
申请人： Kabushiki Kaisha Toshiba
发明人： Kaori Kimura , Masatoshi Sakurai , Kazuto Kashiwagi , Akihiko Takeo
IPC分类号： B05D5/12 , G11B5/84 , G11B5/74
CPC分类号： G11B5/84 , G11B5/746 , G11B5/855
摘要： According to one embodiment, there is provided a magnetic recording medium manufacturing method including forming a resist layer on a magnetic recording layer, patterning the resist layer, forming a magnetic pattern by performing ion implantation through the resist layer, partially modifying the surface of the magnetic recording layer, removing the resist, applying a self-organization material to the surface of the magnetic recording layer and forming a dotted mask pattern, and patterning the magnetic recording layer.
摘要翻译：根据一个实施例，提供了一种磁记录介质制造方法，包括在磁记录层上形成抗蚀剂层，图案化抗蚀剂层，通过通过抗蚀剂层进行离子注入形成磁图案，部分改变磁性表面记录层，去除抗蚀剂，将自组织材料施加到磁记录层的表面并形成虚线掩模图案，并对磁记录层进行构图。

16. 发明申请

US20130215528A1 INFORMATION REPRODUCING APPARATUS AND INFORMATION REPRODUCING METHOD 失效
标题翻译：信息再现设备和信息再现方法
公开(公告)号：US20130215528A1
公开(公告)日：2013-08-22
申请号：US13623748
申请日：2012-09-20
申请人： Kabushiki Kaisha Toshiba
发明人： Tomokazu Okubo , Akihiro Yamazaki , Kazuto Kashiwagi , Naoki Tagami
IPC分类号： G11B20/10
CPC分类号： G11B20/10296 , G11B20/10046 , G11B2220/2516
摘要： According to one embodiment, an information reproducing apparatus is configured to obtain, from a read sample value sequence obtained by sampling a read signal read from a first recording track of a magnetic recording medium, an interference-component-removed read sample value sequence, from which an interference component from a second recording track adjacent to the first recording track is removed. The apparatus includes a decoding module. The decoding module is configured to generate a first interference-component-removed read sample value sequence based on a cancellation weight column which varies according to a difference in polarity between a first bit of the first recording track and a second bit of the second recording track adjacent to the first bit.
摘要翻译：根据一个实施例，信息再现装置被配置为从通过对从磁记录介质的第一记录轨道读取的读取信号进行采样而获得的读取样本值序列获得干扰成分去除的读取样本值序列，从来自与第一记录轨道相邻的第二记录轨道的干扰分量被去除。该装置包括解码模块。解码模块被配置为基于取消权重列产生第一干扰成分去除的读取采样值序列，该取消权重列根据第一记录轨道的第一位和第二记录轨道的第二位之间的极性差异而变化相邻的第一位。

17. 发明申请

US20210081124A1 STORAGE DEVICE DEVELOPED BY INHIBITING WRITE SPEED DEGRADATION OF STORAGE DEVICE AND METHOD CONTROLLING THE SAME 有权
公开(公告)号：US20210081124A1
公开(公告)日：2021-03-18
申请号：US16804493
申请日：2020-02-28
申请人： Kabushiki Kaisha Toshiba , Toshiba Electronic Devices & Storage Corporation
发明人： Kazuto Kashiwagi
IPC分类号： G06F3/06 , G11B5/012 , G11B5/52
摘要： According to one embodiment, a storage device includes a storage medium, and a controller which controls reading and writing of data from and to the storage medium. The controller detects write-off-track having a write-off-track amount larger than a threshold value when the data is written, and interrupts writing of the data when the write-off-track is detected. The controller acquires a degradation amount of a write speed or a degree value indicating a degree of the write-off-track, when the write-off-track amount is equal to or smaller than the threshold value. The controller changes the threshold value based on the degradation amount or the degree value.

18. 发明申请

US20200043521A1 RECORDING DENSITY SETTING METHOD AND MAGNETIC DISK DEVICE 审中-公开
公开(公告)号：US20200043521A1
公开(公告)日：2020-02-06
申请号：US16286926
申请日：2019-02-27
申请人： Kabushiki Kaisha Toshiba , Toshiba Electronic Devices & Storage Corporation
发明人： Kazuto Kashiwagi
IPC分类号： G11B5/012 , G11B5/82
摘要： According to one embodiment, a recording density setting method includes performing first process and performing second process. The first process including recording and reading data on and from a disk medium of a magnetic disk device, and acquiring first information for setting the read data to satisfy a certain quality criterion. The first information represents a first shape of a first plurality of unit regions. Each of the a first plurality of unit regions is a recording region of a unit capacity. The second process includes acquiring second information representing a second shape of the first plurality of unit regions, and setting a recording density on the basis of the second information. The second shape is formed by adding margin regions having the same area to the first plurality of unit regions of the first shape.

19. 发明授权

US09728215B2 Magnetic disk apparatus and data recording method 有权
公开(公告)号：US09728215B2
公开(公告)日：2017-08-08
申请号：US15088952
申请日：2016-04-01
申请人： Kabushiki Kaisha Toshiba
发明人： Masahiro Kanamaru , Kazuto Kashiwagi , Takeyori Hara
IPC分类号： G11B19/04 , G11B5/596 , G11B27/36 , G11B20/10 , G11B20/18 , G11B5/012 , G11B20/12
CPC分类号： G11B5/59627 , G11B5/012 , G11B5/596 , G11B5/59688 , G11B19/041 , G11B20/10009 , G11B20/10305 , G11B20/10388 , G11B20/1217 , G11B20/1889 , G11B27/36 , G11B2020/10898 , G11B2020/1238 , G11B2020/1292 , G11B2020/1869
摘要： A magnetic disk apparatus of one of the embodiments stores read position dependency information on read signal quality of a data region at a first track and measures the read signal quality at a predetermined radial position in a second data region of a second track different from the first track. A positioning error of the second data region is determined based on the read position dependency information and the read signal quality at the predetermined radial position. Data is recorded in a recording target data region in a shingled recording so as to prevent data written in the second data region from being overwritten by data in a recording target data region adjacent to the second data region by using the determined positioning error.

20. 发明申请

US20150046764A1 RECORDING AND REPRODUCING APPARATUS 审中-公开
标题翻译：记录和再现设备
公开(公告)号：US20150046764A1
公开(公告)日：2015-02-12
申请号：US14142096
申请日：2013-12-27
申请人： Kabushiki Kaisha Toshiba
发明人： Kohsuke HARADA , Akihiro Yamazaki , Yosuke Kondo , Kenji Yoshida , Kazuhito Ichihara , Kazuto Kashiwagi
IPC分类号： G06F11/07
CPC分类号： G11B20/1833 , G06F11/10
摘要： According to one embodiment, a recording and reproducing apparatus includes a first masking unit configured to apply first bit masking to error correction code (ECC) encoded data using a bit sequence for masking, to generate a masked bit sequence to be recorded on a medium, and a de-masking unit configured to apply de-masking, using the bit sequence for masking, to a sequence of decision values based on a signal read from the medium to generate a sequence of de-masked decision values to be ECC decoded. The bit sequence for masking comprises an iteration of a fixed bit sequence of N (>1) bits. The bit de-masking is an inverse process corresponding to the first bit masking.
摘要翻译：根据一个实施例，记录和再现装置包括：第一掩蔽单元，被配置为使用用于掩蔽的比特序列对纠错码（ECC）编码数据应用第一比特掩码，以产生待记录在介质上的掩码比特序列，以及去屏蔽单元，被配置为基于从介质读取的信号，使用掩码用的比特序列对决定值序列应用去掩蔽，以产生要被ECC解码的解掩码的判决值序列。用于掩蔽的比特序列包括N（> 1）比特的固定比特序列的迭代。位去掩蔽是对应于第一位掩蔽的反向处理。

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