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91. 发明授权

US09640211B1 Servo track encoding and decoding 有权
公开(公告)号：US09640211B1
公开(公告)日：2017-05-02
申请号：US15151237
申请日：2016-05-10
申请人： Seagate Technology LLC
发明人： Philip L. Steiner , Bruce Douglas Buch
IPC分类号： G11B5/09 , G11B5/02 , G11B5/596
CPC分类号： G11B5/59688 , G11B5/59633 , G11B20/1407 , G11B2020/1484
摘要： A system includes a memory, a processor, an encoder, a head, and a decoder. The memory stores information. The processor processes information and controls operation of other components. The encoder encodes a first portion and a second portion of a servo track to form a first and second encoded values. The second code has a run length associated therewith. The first and second encoded values result in a Gray code. Each bit of the Gray code remains constant for at least a number of tracks corresponding to the run length. The head is configured to write the first and the second encoded values onto a media, and is configured to read the first and the second encoded values from the media. The decoder decodes the first encoded value and the second encoded value. The processor determines a servo track address from the decoded first value and the decoded second value.

92. 发明授权

US09633691B2 Storage controller, storage device, and method 有权
公开(公告)号：US09633691B2
公开(公告)日：2017-04-25
申请号：US15060935
申请日：2016-03-04
申请人： Kabushiki Kaisha Toshiba
发明人： Yosuke Kondo , Kenji Yoshida
IPC分类号： G11B5/09 , G11B20/18
CPC分类号： G11B20/1833
摘要： A storage controller includes a control unit and an interface. The control unit, when write data input as data to be written onto a magnetic disk includes a bit string of a first pattern, inverts one or more bits of the bit string. The write data includes a redundancy bit string used for data error correction. The interface outputs write data including bit inverted by the control unit.

93. 发明授权

US09626998B2 Write interference reduction when reading while writing to a hard disk drive media 有权
公开(公告)号：US09626998B2
公开(公告)日：2017-04-18
申请号：US14903783
申请日：2014-07-30
申请人： MARVELL INTERNATIONAL LTD.
发明人： Jingliang Zhang , Zhimin Yuan , Siang Huei Leong , Budi Santoso , Pantelis Sophoclis Alexopoulos
IPC分类号： G11B5/02 , G11B5/09 , G11B20/10
CPC分类号： G11B20/10046 , G11B20/10009
摘要： A hard disk drive device and a method and apparatus for control of the hard disk drive is provided. The hard disk drive includes disk media, a slider head, a head gimbal assembly and a control means. The disk media includes at least two layers for data storage. The slider head flies above the disk media and includes a writer and a reader, and a head gimbal assembly supports the slider head above the disk media. The control means is physically coupled to the head gimbal assembly and electrically coupled to the writer and the reader for reducing write interference from the writer when the writer is writing to the disk media while the reader is reading from the disk media, wherein write interference is reduced in one or more of a time domain and a frequency domain.

94. 发明授权

US09613652B2 Phase error recovery circuitry and method for a magnetic recording device 有权
公开(公告)号：US09613652B2
公开(公告)日：2017-04-04
申请号：US14808721
申请日：2015-07-24
申请人： Seagate Technology LLC
发明人： Michael J. Link , Bruce Douglas Buch , Belkacem Derras
IPC分类号： G11B5/09 , G11B20/10 , G11B20/18 , G11B5/00
CPC分类号： G11B20/1024 , G11B5/09 , G11B20/1816 , G11B2005/0021 , G11B2020/183
摘要： A recording head is configured to write and read data sectors to and from a recording medium, such as a heat-assisted recording medium. A read channel is coupled to the recording head. Phase-locked loop (PLL) circuitry of the read channel is configured to detect a change in a phase error at a location of the data sector. The phase error change may be indicative of a mode-hop that occurred while writing the data sector to the medium. The PLL circuitry is configured to determine a phase offset using the phase error. A controller is configured to effect re-reading of the data sector location using the phase offset to recover the data sector location.

95. 发明授权

US09607649B1 Determining write-induced protrusion as a function of laser power using temperature measurements 有权
公开(公告)号：US09607649B1
公开(公告)日：2017-03-28
申请号：US15093882
申请日：2016-04-08
申请人： Seagate Technology LLC
发明人： Jason Riddering , Huazhou Lou
IPC分类号： G11B11/00 , G11B7/1267 , G11B5/09 , G11B5/00 , G11B7/1263 , G11B11/105 , G11B7/126
CPC分类号： G11B5/607 , G11B5/455 , G11B5/5534 , G11B7/126 , G11B7/1263 , G11B11/10506 , G11B11/1051 , G11B2005/0021
摘要： A test involves iterations over a series of laser powers of a heat-assisted read/write head. The iterations involve writing to a recording medium at the selected laser power for a sufficient duration to ensure thermal equilibrium of the read/write head at an end of the write. A clearance-control heater of the read/write head is transitioned from a pre-write power before a start of the write to a steady-state write power. The iterations further involve measuring a temperature of the read/write head during the write and adjusting the steady-state write power to achieve a predefined difference between the temperature at the start of the write and the end of the write. The adjusted steady state write power is stored for each iteration. A write-induced protrusion is determined based on the iterations and used for calibration of the read/write head.

96. 发明授权

US09601152B2 Additional overshoot current HDD write driver circuit 有权
公开(公告)号：US09601152B2
公开(公告)日：2017-03-21
申请号：US14974125
申请日：2015-12-18
申请人： Texas Instruments Incorporated
发明人： Marius V. Dina
IPC分类号： G11B15/12 , G11B20/10 , G11B5/09 , G11B5/02 , G11B19/02 , G11B5/012 , G11B15/02
CPC分类号： G11B5/09 , G11B5/012 , G11B5/02 , G11B5/022 , G11B15/02 , G11B19/02 , G11B20/10222
摘要： A hard disk drive write drive method and integrated circuit that provide a configurable overshoot current based on the length of the pattern in the write current signal that is being written to the hard disk by the write driver. The hard disk write driver adds a first overshoot current to all patterns in the write current signal and adds an additional second overshoot current to patterns in the write current signal shorter than a first duration. The hard disk drive write driver utilizes an H-bridge circuit configured to add the first overshoot current and the additional second overshoot current to the write current signal. The H-bridge circuit is comprised of four switching elements that are configured to generate a first overshoot current for all pattern transitions of the write current signal and generate a second overshoot current for pattern transitions shorter than the first duration.

97. 发明申请

US20170071056A1 TEMPERATURE MANAGEMENT IN DATA STORAGE DEVICES 有权
标题翻译：数据存储设备中的温度管理
公开(公告)号：US20170071056A1
公开(公告)日：2017-03-09
申请号：US14848158
申请日：2015-09-08
申请人： Western Digital Technologies, Inc.
发明人： KROUM S. STOEV , DEAN MITCHAM JENKINS , DALE CHARLES MAIN
IPC分类号： H05K1/02 , G11B5/09 , G11C16/10
CPC分类号： H05K1/0212 , G11B5/09 , G11B5/40 , G11B19/046 , G11C7/04 , G11C16/10 , G11C16/3418 , G11C16/349 , H05K2201/10159
摘要： Systems and methods are disclosed for managing temperature in a data storage device. A data storage device includes non-volatile solid-state memory, a temperature sensor, a heating device, and a controller. The controller is configured to receive a temperature signal from the temperature sensor indicating a temperature of at least a portion of the data storage device, determine that the temperature is below a first predetermined threshold, activate the heating device to increase the temperature of the at least a portion of the data storage device, and write data associated with a write command to the non-volatile solid-state memory.
摘要翻译：公开了用于管理数据存储设备中的温度的系统和方法。数据存储装置包括非易失性固态存储器，温度传感器，加热装置和控制器。所述控制器被配置为从所述温度传感器接收指示所述数据存储装置的至少一部分的温度的温度信号，确定所述温度低于第一预定阈值，激活所述加热装置以至少增加所述温度数据存储设备的一部分，以及与写入命令相关联的数据写入非易失性固态存储器。

98. 发明授权

US09589592B1 Read head characteristic pre-detection 有权
标题翻译：读头特征预检测
公开(公告)号：US09589592B1
公开(公告)日：2017-03-07
申请号：US14932140
申请日：2015-11-04
申请人： Seagate Technology LLC
发明人： Mingyeong Son , Seungyoul Jeong , Man Sik Shim , Woo Chan Kim
IPC分类号： G11B27/36 , G11B5/09 , G11B20/10 , G11B5/02 , G11B20/18
CPC分类号： G11B20/10009 , G11B5/02 , G11B5/40 , G11B5/455 , G11B19/041 , G11B20/10324 , G11B20/10388 , G11B20/1816 , G11B2020/183
摘要： Implementations disclosed herein provide a method comprising applying voltage to a read head during an unload state, detecting characteristic read head data, and storing the detected characteristic read head data in a buffer. In another implementation, the method further comprises performing a read retry operation in response to a read failure, reading the detected characteristic read head data from the buffer, determining if the detected characteristic read head data meets a threshold for a first predetermined criterion, performing a correction operation if the threshold for the first the first predetermined criterion is met, determining whether a media sector is read successfully, and ending the read retry operation if the media sector is read successfully.
摘要翻译：本文公开的实施方案提供了一种方法，包括在卸载状态期间向读取头施加电压，检测特征读取头数据，以及将检测到的特征读取头数据存储在缓冲器中。在另一实现中，该方法还包括响应于读取失败执行读取重试操作，从缓冲器读取检测到的特征读取头数据，确定检测到的特征读取头数据是否满足第一预定标准的阈值，执行校正操作，如果满足第一个第一预定标准的阈值，则确定媒体扇区是否被成功读取，并且如果成功读取媒体扇区，则结束读取重试操作。

99. 发明授权

US09589590B2 Anti-piracy feature for optical discs 有权
标题翻译：防盗版功能用于光盘
公开(公告)号：US09589590B2
公开(公告)日：2017-03-07
申请号：US14502390
申请日：2014-09-30
申请人： Microsoft Corporation
发明人： Felix Domke , Kenneth M McGrail
IPC分类号： G11B5/09 , G11B20/12 , G11B20/10 , G11B20/00 , G11B7/14 , G11B7/24091 , G11B7/26 , G11B7/24076 , G11B7/007
CPC分类号： G11B20/00601 , G11B7/007 , G11B7/14 , G11B7/24076 , G11B7/24091 , G11B7/261 , G11B20/00086 , G11B20/00123 , G11B20/00695 , G11B2007/00709 , G11B2007/00727
摘要： Disclosed are techniques and systems for manufacturing an optical disc having a stochastic (i.e., non-deterministic) anti-piracy feature in the form of a multi-spiral structure, and for verifying the feature on the optical disc to authenticate the disc for playback. The multi-spiral structure may be comprised of multiple partially interleaved, and partially overlapping, spiral data tracks formed in a designated area of the optical disc. A process of forming the multi-spiral structure may include forming, in the designated area, a first spiral data track with first track pitch and a second spiral data track with second track pitch that is different than the first track pitch. The multi-spiral structure may be analyzed to determine verification parameters for verifying the multi-spiral structure, and those verification parameters may be encrypted so that they may be subsequently decrypted and used to verify the multi-spiral structure on a disc reading device.
摘要翻译：公开了用于制造具有多螺旋结构形式的随机（即非确定性）反盗版特征的光盘的技术和系统，并且用于验证光盘上的特征以认证该盘用于重放。多螺旋结构可以由形成在光盘的指定区域中的多个部分交错和部分重叠的螺旋数据轨道组成。形成多螺旋结构的过程可以包括在指定区域中形成具有第一轨道间距的第一螺旋数据轨道和具有不同于第一轨道间距的第二轨道间距的第二螺旋数据轨迹。可以分析多螺旋结构以确定用于验证多螺旋结构的验证参数，并且可以对这些验证参数进行加密，使得它们可以随后被解密并用于验证盘读取装置上的多螺旋结构。

100. 发明申请

US20170025147A1 PHASE ERROR RECOVERY CIRCUITRY AND METHOD FOR A MAGNETIC RECORDING DEVICE 有权
标题翻译：相位误差恢复电路和磁记录装置的方法
公开(公告)号：US20170025147A1
公开(公告)日：2017-01-26
申请号：US14808721
申请日：2015-07-24
申请人： Seagate Technology LLC
发明人： Michael J. Link , Bruce Douglas Buch , Belkacem Derras
IPC分类号： G11B20/10 , G11B20/18 , G11B5/09
CPC分类号： G11B20/1024 , G11B5/09 , G11B20/1816 , G11B2005/0021 , G11B2020/183
摘要： A recording head is configured to write and read data sectors to and from a recording medium, such as a heat-assisted recording medium. A read channel is coupled to the recording head. Phase-locked loop (PLL) circuitry of the read channel is configured to detect a change in a phase error at a location of the data sector. The phase error change may be indicative of a mode-hop that occurred while writing the data sector to the medium. The PLL circuitry is configured to determine a phase offset using the phase error. A controller is configured to effect re-reading of the data sector location using the phase offset to recover the data sector location.
摘要翻译：记录头被配置为向诸如热辅助记录介质的记录介质写入和读取数据扇区。读通道耦合到记录头。读通道的锁相环（PLL）电路被配置为检测数据扇区位置处的相位误差的变化。相位误差变化可以指示在将数据扇区写入介质时发生的模式跳跃。 PLL电路被配置为使用相位误差来确定相位偏移。控制器被配置为使用相位偏移来重新读取数据扇区位置，以恢复数据扇区位置。

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