公开(公告)号：US08665546B1

公开(公告)日：2014-03-04

申请号：US12684045

申请日：2010-01-07

申请人： Hongchao Tim Zhao ,  Jiangang Liang ,  Yilin Cai ,  Don Brunnett

发明人： Hongchao Tim Zhao ,  Jiangang Liang ,  Yilin Cai ,  Don Brunnett

IPC分类号： G11B21/02

CPC分类号： G11B5/6076 ,  G11B5/607

摘要： A disk drive is disclosed comprising a disk, a head for writing data to the disk, and control circuitry coupled to the head. The control circuitry is operable to determine a first set of fly height values and determine a threshold based on the first set of fly height values. The control circuitry determines a second set of fly height values, adjusts the threshold based on the second set of fly height values, and detects a head characteristic based on the adjusted threshold. The head characteristic is detected by detecting a head touchdown event and/or detecting contamination related to the head based on the adjusted threshold.

摘要翻译： 公开了一种磁盘驱动器，其包括盘，用于将数据写入盘的头和耦合到头的控制电路。 控制电路可操作以确定第一组飞行高度值，并基于第一组飞行高度值确定阈值。 控制电路确定第二组飞行高度值，基于第二组飞行高度值来调整阈值，并且基于经调整的阈值检测头部特性。 通过基于经调整的阈值检测头部触地事件和/或检测与头部相关的污染物来检测头部特性。

公开(公告)号：US07630162B2

公开(公告)日：2009-12-08

申请号：US12025676

申请日：2008-02-04

申请人： Hongchao Tim Zhao ,  Jiangang Liang

发明人： Hongchao Tim Zhao ,  Jiangang Liang

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B5/5547 ,  G11B5/59661 ,  G11B5/6076

摘要： A method is disclosed for selecting a dynamic fly height (DFH) control setting for a head in a disk drive, the disk drive comprising a plurality of disk surfaces and plurality of respective heads. The method comprises servoing a first head over a first disk surface in response to servo data recorded on the first disk surface, adjusting a DFH control setting for a second head, and while servoing the first head over the first disk surface, detecting whether the second head has contacted a second disk surface.

摘要翻译： 公开了一种用于选择磁盘驱动器中的磁头的动态飞行高度（DFH）控制设置的方法，该磁盘驱动器包括多个磁盘表面和多个相应磁头。 该方法包括响应于记录在第一盘表面上的伺服数据，在第一盘表面上伺服第一头，调整第二头的DFH控制设置，以及在第一盘表面上伺服第一头，检测第二头 头已经接触到第二个磁盘表面。

公开(公告)号：US07974039B1

公开(公告)日：2011-07-05

申请号：US12486682

申请日：2009-06-17

申请人： Jianfeng Xu ,  Soo-Choon Kang ,  Kazuhiro Saito ,  Hongchao Tim Zhao

发明人： Jianfeng Xu ,  Soo-Choon Kang ,  Kazuhiro Saito ,  Hongchao Tim Zhao

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B5/6005 ,  G11B5/6064 ,  G11B5/6076

摘要： A disk drive to reduce head instability during disk drive manufacturing is disclosed. The disk drive comprises: a disk; a dynamic flying height (DFH) read/write head; a flying height actuator to control the spacing between the DFH read/write head and the disk; and a controller. The controller controls operations in the disk drive including applying a sloped increasing power between a first voltage and a second voltage to move the DFH read/write head towards the disk.

摘要翻译： 公开了一种在磁盘驱动器制造期间减少磁头不稳定性的磁盘驱动器。 磁盘驱动器包括：磁盘; 动态飞行高度（DFH）读/写头; 用于控制DFH读/写磁头和磁盘之间的间距的飞行高度执行器; 和控制器。 控制器控制磁盘驱动器中的操作，包括在第一电压和第二电压之间施加倾斜的增加功率，以将DFH读/写头朝向磁盘移动。

公开(公告)号：US20090195936A1

公开(公告)日：2009-08-06

申请号：US12025676

申请日：2008-02-04

申请人： HONGCHAO TIM ZHAO ,  JIANGANG LIANG

发明人： HONGCHAO TIM ZHAO ,  JIANGANG LIANG

IPC分类号： G11B5/54

CPC分类号： G11B5/5547 ,  G11B5/59661 ,  G11B5/6076

摘要： A method is disclosed for selecting a dynamic fly height (DFH) control setting for a head in a disk drive, the disk drive comprising a plurality of disk surfaces and plurality of respective heads. The method comprises servoing a first head over a first disk surface in response to servo data recorded on the first disk surface, adjusting a DFH control setting for a second head, and while servoing the first head over the first disk surface, detecting whether the second head has contacted a second disk surface.

摘要翻译： 公开了一种用于选择磁盘驱动器中的磁头的动态飞行高度（DFH）控制设置的方法，该磁盘驱动器包括多个磁盘表面和多个相应磁头。 该方法包括响应于记录在第一盘表面上的伺服数据，在第一盘表面上伺服第一头，调整第二头的DFH控制设置，以及在第一盘表面上伺服第一头，检测第二头 头已经接触到第二个磁盘表面。