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公开(公告)号：US11417363B1
公开(公告)日：2022-08-16
申请号：US17358431
申请日：2021-06-25
发明人： Jianbin Nie , Duc H. Banh
摘要： A data storage device is disclosed comprising a head actuated over a disk surface by an actuator arm. The actuator is controlled to press the actuator arm against a crash stop in order to write a plurality of bursts on the disk surface each with a different write parameter setting. Each burst is read in order to measure a quality metric for each burst, and an operating setting for the write parameter is configured based on the measured quality metrics.
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2.发明授权Data storage device attenuating interference from first spiral track when reading second spiral track 有权数据存储设备在读取第二个螺旋轨道时会衰减第一个螺旋轨道的干扰公开(公告)号：US09208810B1
公开(公告)日：2015-12-08
申请号：US14560407
申请日：2014-12-04
CPC分类号： G11B5/59666 , G11B5/59661
摘要： A data storage device is disclosed comprising a disk surface comprising a first spiral track at least partially overwritten by a second spiral track, and a head actuated over the disk surface based on the second spiral track. The first spiral track comprises a periodic pattern written at a first frequency, and the second spiral track comprises a periodic pattern written at a second frequency different from the first frequency.
摘要翻译： 公开了一种数据存储装置，其包括盘表面，该盘表面包括至少部分地被第二螺旋形轨迹覆盖的第一螺旋轨道，以及基于第二螺旋轨道在盘表面上致动的头。 第一螺旋轨道包括以第一频率写入的周期性图案，并且第二螺旋轨道包括以与第一频率不同的第二频率写入的周期性图案。
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3.发明授权Disk drive writing radial offset spiral servo tracks by reading spiral seed tracks 有权磁盘驱动器通过读取螺旋种子轨迹写入径向偏移螺旋伺服轨道公开(公告)号：US09076490B1
公开(公告)日：2015-07-07
申请号：US13712905
申请日：2012-12-12
发明人： Jianbin Nie , Edgar D. Sheh , Siri S. Weerasooriya
CPC分类号： G11B5/5543 , G11B5/59638 , G11B5/59661
摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of spiral seed tracks. The head is positioned at a first radial location over the disk, and the head is servoed over the disk in response to the spiral seed tracks starting from the first radial location in order to write a first spiral servo track on the disk. The head is positioned at a second radial location over the disk different from the first radial location, and the head is servoed over the disk in response to the spiral seed tracks starting from the second radial location in order to write a second spiral servo track on the disk.
摘要翻译： 公开了一种磁盘驱动器，包括在包括多个螺旋种子轨道的盘上致动的磁头。 头部位于盘的第一径向位置，并且头部响应于从第一径向位置开始的螺旋种子轨迹而在盘上伺服，以便在盘上写入第一螺旋伺服轨迹。 头部位于不同于第一径向位置的盘上的第二径向位置处，并且头部响应于从第二径向位置开始的螺旋种子轨迹而在盘上被伺服，以便将第二螺旋伺服轨迹写入 磁盘。
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公开(公告)号：US20230317107A1
公开(公告)日：2023-10-05
申请号：US17693626
申请日：2022-03-14
发明人： Guoxiao Guo , Jianbin Nie , Triet Tieu , Duc H. Banh , Tianyu Jiang
IPC分类号： G11B5/55
CPC分类号： G11B5/5543 , G11B5/5565 , G11B5/5573
摘要： Various illustrative aspects are directed to a data storage device comprising: a voice coil motor (VCM) and one or more processing devices, configured to actuate the VCM, switch on measuring a back electromotive force (BEMF) from the VCM for intervals of an initial BEMF measurement that are free of spikes in the initial BEMF measurement, and process a measured BEMF signal from the intervals of the initial BEMF measurement that are free of spikes in a change of current term of the initial BEMF measurement.
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5.发明授权Disk drive measuring radial offset between heads by detecting a difference between ramp contact 有权磁盘驱动器通过检测斜坡接触之间的差异来测量头部之间的径向偏移公开(公告)号：US09064537B1
公开(公告)日：2015-06-23
申请号：US14040960
申请日：2013-09-30
发明人： Jianbin Nie , Edgar D. Sheh , Brian P. Rigney
CPC分类号： G11B5/59627 , G11B21/12
摘要： A disk drive is disclosed comprising a plurality of disk surfaces including a first disk surface and a second disk surface. The disk drive further comprises a plurality of heads including a first head actuated over the first disk surface, and a second head actuated over the second disk surface, as well as a ramp proximate an outer diameter of the disk surfaces. A first interval is measured while moving the first head toward the ramp until the first head contacts the ramp, and a second interval is measured while moving the second head toward the ramp until the second head contacts the ramp.
摘要翻译： 公开了一种磁盘驱动器，其包括包括第一盘表面和第二盘表面的多个盘表面。 磁盘驱动器还包括多个磁头，包括在第一磁盘表面上致动的第一磁头和在第二磁盘表面上致动的第二磁头以及靠近磁盘表面的外径的斜面。 测量第一间隔，同时朝向斜坡移动第一头，直到第一头接触斜坡，并且在将第二头朝向斜坡移动时测量第二间隔，直到第二头接触斜坡。
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6.发明授权Disk drive measuring spiral track error by measuring a slope of a spiral track across a disk radius 有权磁盘驱动器通过测量磁盘半径上的螺旋轨道的斜率来测量螺旋轨迹误差公开(公告)号：US09047901B1
公开(公告)日：2015-06-02
申请号：US13903197
申请日：2013-05-28
发明人： Jianbin Nie , Edgar D. Sheh , Siri S. Weerasooriya
CPC分类号： G11B5/59661
摘要： A disk drive is disclosed comprising a disk comprising at least one spiral track, a head, and an actuator operable to actuate the head over the disk. A slope of the spiral track is measured at a plurality of radial locations across the disk, and a spiral track error at each radial location is generated based on a difference between the measured slope and a target slope. The head is actuated over the disk based on the spiral track and the spiral track error.
摘要翻译： 公开了一种磁盘驱动器，其包括盘，该盘包括至少一个螺旋形轨道，头部和可操作以致动头部在盘上的致动器。 在跨越盘的多个径向位置处测量螺旋轨道的斜率，并且基于所测量的斜率与目标斜率之间的差异来生成每个径向位置处的螺旋轨道误差。 基于螺旋轨道和螺旋轨道误差，磁头在盘上被致动。
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公开(公告)号：US11798587B1
公开(公告)日：2023-10-24
申请号：US17693626
申请日：2022-03-14
发明人： Guoxiao Guo , Jianbin Nie , Triet Tieu , Duc H. Banh , Tianyu Jiang
IPC分类号： G11B5/55
CPC分类号： G11B5/5543 , G11B5/5565 , G11B5/5573
摘要： Various illustrative aspects are directed to a data storage device comprising: a voice coil motor (VCM) and one or more processing devices, configured to actuate the VCM, switch on measuring a back electromotive force (BEMF) from the VCM for intervals of an initial BEMF measurement that are free of spikes in the initial BEMF measurement, and process a measured BEMF signal from the intervals of the initial BEMF measurement that are free of spikes in a change of current term of the initial BEMF measurement.
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公开(公告)号：US11581012B1
公开(公告)日：2023-02-14
申请号：US17543209
申请日：2021-12-06
发明人： Jianbin Nie , Trung Trieu , Bryson Mitsui
摘要： Various illustrative aspects are directed to a data storage device. The data storage device comprises a first actuator; a second actuator; a first set of disks, comprising one or more disks configured to correspond with the first actuator; a second set of disks, comprising one or more disks configured to correspond with the second actuator; and one or more processing devices. The one or more processing devices are configured to: write final spirals on the first set of disks; determine a time delta to implement cross-actuator alignment between the first set of disks and the second set of disks; and apply the time delta in writing final spirals for the second set of disks.
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9.发明授权Data storage device measuring reader/writer offset by reading spiral track and concentric servo sectors 有权数据存储设备通过读取螺旋轨道和同心伺服扇区来偏移测量读取器/写入器公开(公告)号：US09245560B1
公开(公告)日：2016-01-26
申请号：US14642684
申请日：2015-03-09
CPC分类号： G11B5/59666 , G11B5/455 , G11B5/59661
摘要： A data storage device is disclosed comprising a disk comprising a spiral track, and a head actuated over the disk, wherein the head comprises a read element offset radially from a write element by a reader/writer offset. The spiral track is first read to write a plurality of concentric servo sectors on the disk that define at least one concentric servo track on the disk. The spiral track is second read and the concentric servo sectors are read to measure the reader/writer offset.
摘要翻译： 公开了一种数据存储装置，其包括盘，该盘包括螺旋轨道，以及在盘上致动的头，其中头部包括通过读/写器偏移从写入元件径向偏移的读取元件。 首先读取螺旋轨迹以在盘上写入多个同心伺服扇区，其在盘上限定至少一个同心伺服轨道。 第二次读取螺旋轨道，并读取同心伺服扇区以测量读/写偏移量。
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10.发明授权Disk drive opening spiral crossing window based on DC and AC spiral track error 有权基于直流和交流螺旋轨迹误差的磁盘驱动器开口螺旋交叉窗口公开(公告)号：US09053727B1
公开(公告)日：2015-06-09
申请号：US14293889
申请日：2014-06-02
发明人： Jianbin Nie , Brian P. Rigney , Edgar D. Sheh
CPC分类号： G11B5/59666 , G11B5/59661 , G11B5/59688 , G11B20/10009 , G11B20/10222 , G11B20/10481 , G11B2020/10916 , G11B2020/1281
摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of spiral tracks including a first spiral track. A DC spiral track error common to the spiral tracks is measured relative to an ideal slope for the spiral tracks, and an AC spiral track error is measured for each spiral track relative to the ideal slope. As the head approaches the first spiral track, a spiral crossing window is opened based on the measured DC spiral track error and the measured AC spiral track error for the first spiral track, and the first spiral track is detected after opening the spiral crossing window.
摘要翻译： 公开了一种磁盘驱动器，包括在包括第一螺旋磁道的多个螺旋轨道的盘上驱动的磁头。 相对于螺旋轨道的理想斜率测量螺旋轨道共有的DC螺旋轨道误差，并且针对每个螺旋轨道相对于理想斜率测量AC螺旋轨道误差。 当头部接近第一螺旋轨迹时，基于所测量的DC螺旋轨道误差和第一螺旋轨道的测量的AC螺旋轨道误差来打开螺旋交叉窗口，并且在打开螺旋交叉窗口之后检测第一螺旋轨道。
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