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公开(公告)号：US10366722B1
公开(公告)日：2019-07-30
申请号：US15978432
申请日：2018-05-14
Applicant: Seagate Technology LLC
Inventor： Riyan Mendonsa , James Dillon Kiely , Joshua Ward Christensen , Jon D. Trantham , Chad Robert Barry , Tim Rausch
IPC: G11B11/00 , G11B7/1263 , G11B5/00 , G11B7/1267 , G11B5/60 , G11B7/126
Abstract: An apparatus comprises a laser diode configured to generate modulated light during a write operation in response to receiving modulated current having a mean amplitude that varies or is constant. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A writer heater of the slider is configured to receive power during the write operation having a magnitude that varies or is constant. A sensor is situated on or within the slider. The sensor is configured to produce a sensor signal representative of output optical power of the laser diode. Measuring circuitry is coupled to the sensor and configured to measure a change in the sensor signal indicative of a laser mode hop during the write operation.
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公开(公告)号：US20180359227A1
公开(公告)日：2018-12-13
申请号：US15620270
申请日：2017-06-12
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Mark A. Gaertner , Monty Aaron Forehand , Paul Michael Wiggins
CPC classification number: H04L63/0457 , G06F21/6218 , G06F2221/2143 , H04L63/061
Abstract: A method includes adding a key version tag to an encryption key store that stores encryption keys. The key version tag is inserted into a data stream. The data stream including the key version tag is written to media. The data in the data stream is erased by scrambling the encryption keys and incrementing the key version tag in the encryption store by a digit. The data stream is replaced with a replacement data pattern when the key version tag stored in the encryption store and the key version tag located in the data stream mismatch.
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公开(公告)号：US10020012B1
公开(公告)日：2018-07-10
申请号：US15798541
申请日：2017-10-31
Applicant: Seagate Technology LLC
Inventor： Aaron P. Weyer , Bruce Douglas Buch , Kyaw Sin Maung , Jon D. Trantham , Nicholas Paul Mati
CPC classification number: G11B5/5526 , G06F13/42 , G11B5/59616
Abstract: First and second servo control processors are coupled to respective first and second actuators that independently position first and second heads over one or more disks of a data storage drive. The first and second servo control processors are further coupled to first and second low-latency ports. First and second unidirectional buses couple the first and second low-latency ports. The first and second unidirectional busses are operable to isochronously exchange servo positioning data between the first and second servo control processors. The first and second servo control processors each use the servo positioning data to compensate for movement caused by another of the first and second servo control processors.
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公开(公告)号：US09875758B1
公开(公告)日：2018-01-23
申请号：US15291290
申请日：2016-10-12
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Jason Bryce Gadbois , Mehmet Fatih Erden
CPC classification number: G11B5/29 , G11B5/3133 , G11B5/596
Abstract: A slider includes an array of two or more transducer sets offset from one another in a cross-track direction. Each transducer set includes at least one writer and at least one reader. All of the transducer sets are configured to operate simultaneously to perform any combination of reading and writing on two or more tracks of a recording medium. At least one actuator is included between two the transducer sets. The actuator is configured to adjust a cross-track spacing between the two transducer sets in response to a control current.
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公开(公告)号：US09530438B1
公开(公告)日：2016-12-27
申请号：US15005633
申请日：2016-01-25
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Todd M. Lammers
CPC classification number: G11B5/09 , G11B5/02 , G11B5/4853 , G11B19/046 , G11B2005/0021 , G11B2005/0024
Abstract: Apparatus and method for generating supply voltages in a data storage device. In some embodiments, the apparatus includes a data transducer adjacent a rotatable magnetic recording medium, the data transducer having a write coil and an electromagnetic source for thermally assisted recording by the write coil. A preamplifier/driver circuit (preamp) has a write driver adapted to supply write currents to the write coil and a source driver adapted to supply source voltage to the electromagnetic source. A voltage regulation circuit applies a first positive supply voltage to the write driver and a different, second positive supply voltage to the source driver.
Abstract translation: 一种用于在数据存储装置中产生电源电压的装置和方法。 在一些实施例中，该装置包括邻近可旋转磁记录介质的数据传感器，数据传感器具有写入线圈和用于通过写入线圈进行热辅助记录的电磁源。 前置放大器/驱动器电路（前置放大器）具有适于向写入线圈提供写入电流的写入驱动器和适于将电源电压提供给电磁源的源极驱动器。 电压调节电路向写驱动器施加第一正电源电压，向源极驱动器施加不同的第二正电源电压。
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Patent Agency Ranking
公开(公告)号：US09318153B2
公开(公告)日：2016-04-19
申请号：US14230367
申请日：2014-03-31
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Robert Matousek , Todd M. Lammers
IPC: G11B5/02 , G11B11/00 , G11B27/36 , G11B13/08 , G11B13/04 , G11B11/105 , G11B5/48 , G11B5/31 , G11B5/60 , G11B5/00
CPC classification number: G11B27/36 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B11/10504 , G11B11/10506 , G11B13/04 , G11B13/08 , G11B2005/0021
Abstract: A data storage apparatus includes a controller capable of being coupled to a read/write head. The controller is configured to receive a fault signal from a sensor of the read/write head. The sensor indicates whether an energy source used to heat the recording medium is malfunctioning during a write operation. In response to the fault signal, the controller takes remedial action to protect the data associated with the write operation.
Abstract translation: 数据存储装置包括能够耦合到读/写头的控制器。 控制器被配置为从读/写头的传感器接收故障信号。 传感器指示在写入操作期间用于加热记录介质的能量源是否发生故障。 响应于故障信号，控制器采取补救措施来保护与写操作相关的数据。
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公开(公告)号：US20150332725A1
公开(公告)日：2015-11-19
申请号：US14278377
申请日：2014-05-15
Applicant: Seagate Technology LLC
Inventor： Tim Rausch , Jon D. Trantham , John W. Dykes , Won Choul YANG
IPC: G11B7/1263
CPC classification number: G11B7/1263 , G11B5/012 , G11B5/02 , G11B7/00736 , G11B7/1267 , G11B19/046 , G11B2005/0021
Abstract: A method of controlling laser output in a heat assisted magnetic recording device can be performed by control circuitry in a data storage device. The method includes measuring a temperature, measuring laser output power of a laser, determining a power error by subtracting an optimal laser output power from the measured laser output power and comparing the power error to at least one threshold to determine whether an applied current to the laser needs to be adjusted. The at least one threshold is related to how great the power error can be while maintaining the integrity of data on a recording medium.
Abstract translation: 控制热辅助磁记录装置中的激光输出的方法可由数据存储装置中的控制电路执行。 该方法包括测量温度，测量激光器的激光输出功率，通过从所测量的激光输出功率减去最佳激光输出功率并将功率误差与至少一个阈值进行比较来确定功率误差，以确定施加到 激光需要调整。 至少一个阈值与维持记录介质上数据完整性的功率误差有多大关系。
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公开(公告)号：US20150279430A1
公开(公告)日：2015-10-01
申请号：US14230367
申请日：2014-03-31
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Robert Matousek , Todd M. Lammers
CPC classification number: G11B27/36 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B11/10504 , G11B11/10506 , G11B13/04 , G11B13/08 , G11B2005/0021
Abstract: A data storage apparatus includes a controller capable of being coupled to a read/write head. The controller is configured to receive a fault signal from a sensor of the read/write head. The sensor indicates whether an energy source used to heat the recording medium is malfunctioning during a write operation. In response to the fault signal, the controller takes remedial action to protect the data associated with the write operation.
Abstract translation: 数据存储装置包括能够耦合到读/写头的控制器。 控制器被配置为从读/写头的传感器接收故障信号。 传感器指示在写入操作期间用于加热记录介质的能量源是否发生故障。 响应于故障信号，控制器采取补救措施来保护与写操作相关的数据。
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公开(公告)号：US09043668B2
公开(公告)日：2015-05-26
申请号：US13762436
申请日：2013-02-08
Applicant: Seagate Technology LLC
Inventor： Ryan James Goss , Mark Allen Gaertner , Jon D. Trantham
CPC classification number: H03M13/2906 , G06F11/1048
Abstract: Method and apparatus for managing data in a memory. In accordance with some embodiments, a first data object and an associated first ECC data set are generated and stored in a non-volatile (NV) main memory responsive to a first set of data blocks having a selected logical address. A second data object and an associated second ECC data set are generated responsive to receipt of a second set of data blocks having the selected logical address. The second data object and the second ECC data set are subsequently stored in the in the NV main memory responsive to a mismatch between the first ECC data set and the second ECC data set.
Abstract translation: 用于管理存储器中的数据的方法和装置。 根据一些实施例，响应于具有所选逻辑地址的第一组数据块，生成第一数据对象和相关联的第一ECC数据集并将其存储在非易失性（NV）主存储器中。 响应于接收到具有所选逻辑地址的第二组数据块，产生第二数据对象和相关联的第二ECC数据集。 随后，第二数据对象和第二ECC数据集随后存储在NV主存储器中，以响应第一ECC数据集和第二ECC数据集之间的不匹配。
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公开(公告)号：US09001452B2
公开(公告)日：2015-04-07
申请号：US14063942
申请日：2013-10-25
Applicant: Seagate Technology LLC
Inventor： Antanas Daugela , Jon D. Trantham , Srinivas Tadepalli
CPC classification number: G11B5/6029 , G11B5/607 , G11B5/6076
Abstract: In one implementation, a method and apparatus is provided for determining an active fly height setting for a transducer head from samples collected from a proximity sensor during less than a single revolution of a disc. Implementations of the method and system use adaptive discrete wavelet transform parameters generated from the collected samples to determine an active fly height setting for a transducer head.
Abstract translation: 在一个实施方案中，提供了一种方法和装置，用于在盘的单次旋转期间从接近传感器收集的样品确定换能器头的主动飞行高度设置。 方法和系统的实现使用从采集的样本产生的自适应离散小波变换参数，以确定换能器头的主动飞行高度设置。
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