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1. 发明授权

US09047907B2 Electronic device avoiding false detection of free fall event based on detected operating modes 有权
标题翻译：基于检测到的操作模式，电子设备避免错误检测自由落体事件
公开(公告)号：US09047907B2
公开(公告)日：2015-06-02
申请号：US13167532
申请日：2011-06-23
申请人： Jonathan V. Nguyen , Toviah N. Hirschberg , Hien T. Chu
发明人： Jonathan V. Nguyen , Toviah N. Hirschberg , Hien T. Chu
IPC分类号： G01N19/02 , G11B19/04 , G01P15/00 , G01P15/08 , G06F11/30
CPC分类号： G11B19/043 , G01P15/00 , G01P15/08 , G06F11/3013 , G06F11/3058 , G06F11/3093 , G11B19/042
摘要： An electronic device is disclosed comprising an acceleration sensor operable to generate an acceleration signal, and a free fall detector operable to detect a free fall event in response to the acceleration signal. A frequency response of the acceleration signal is measured, and the free fall detector is disabled when a magnitude of the frequency response within one of a plurality of frequency bands exceeds a threshold, wherein each frequency band corresponds to one of a plurality of normal operating modes.
摘要翻译：公开了一种电子设备，包括可操作以产生加速度信号的加速度传感器和可操作以响应于加速度信号检测自由落体事件的自由落体检测器。测量加速度信号的频率响应，并且当多个频带之一内的频率响应的幅度超过阈值时，自由落体检测器被禁用，其中每个频带对应于多个正常操作模式。

2. 发明授权

US07440214B1 Disk drive and method having cost-effective storage of the disk drive's internal program code 有权
标题翻译：磁盘驱动器和方法具有高性价比的存储磁盘驱动器的内部程序代码
公开(公告)号：US07440214B1
公开(公告)日：2008-10-21
申请号：US10427484
申请日：2003-04-30
申请人： Travis E. Ell , Hanan Kupferman , Hoa V. Le , Jonathan V. Nguyen , Saied Tamaddon-Dallal , Virat Thantrakul , Teik Ee Yeo
发明人： Travis E. Ell , Hanan Kupferman , Hoa V. Le , Jonathan V. Nguyen , Saied Tamaddon-Dallal , Virat Thantrakul , Teik Ee Yeo
IPC分类号： G11B15/18
CPC分类号： G11B5/5965
摘要： Disclosed is a disk drive having a disk, a masked read-only memory (ROM) device, a reprogrammable nonvolatile memory device, and a microprocessor for executing program code. The disk has a magnetic data storage surface with embedded servo wedges for defining data storage tracks including reserve tracks. The masked ROM device stores program code for implementing a spindle motor controller, program code for implementing a portion of a servo controller for track following along a data storage track, and program code for implementing a portion of a disk controller for controlling writing disk data to and reading disk data from the reserve tracks. The reprogrammable nonvolatile memory device stores data parameters relating to the disk drive's configuration. The reserve tracks store program code for implementing a cache control system for controlling caching of disk data in a cache memory.
摘要翻译：公开了一种具有盘的磁盘驱动器，掩蔽的只读存储器（ROM）器件，可再编程的非易失性存储器件以及用于执行程序代码的微处理器。磁盘具有带有嵌入式伺服楔的磁数据存储表面，用于定义包括备用轨道的数据存储轨迹。被屏蔽的ROM设备存储用于实现主轴电动机控制器的程序代码，用于实现沿着数据存储轨道跟踪的伺服控制器的一部分的程序代码，以及用于实现用于控制将盘数据写入的盘控制器的一部分的程序代码并从备用磁道读取磁盘数据。可编程非易失性存储器件存储与磁盘驱动器配置相关的数据参数。储备跟踪存储程序代码，用于实现用于控制高速缓冲存储器中的磁盘数据的高速缓存的高速缓存控制系统。

3. 发明授权

US07576941B1 Disk drive writing wedge RRO values in a butterfly pattern 失效
标题翻译：磁盘驱动器写入楔形RRO值为蝴蝶图案
公开(公告)号：US07576941B1
公开(公告)日：2009-08-18
申请号：US11924830
申请日：2007-10-26
申请人： Teddy T. C. Chen , Eugene Chun-Tsing Wu , John Yin Kwong Li , Jie Yu , Jonathan V. Nguyen , Tuong M. Vu , Guoxiao Guo
发明人： Teddy T. C. Chen , Eugene Chun-Tsing Wu , John Yin Kwong Li , Jie Yu , Jonathan V. Nguyen , Tuong M. Vu , Guoxiao Guo
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A disk drive is disclosed comprising a plurality of servo sectors that define a plurality of tracks, and a head comprising a read element radially offset from a write element. The read element is positioned over a first track, and the first track is read to generate first read wedge repeatable runout (WRRO) values. A first seek operation of the head positions the read element over a second track, and the second track is read to generate first write WRRO values. The first write WRRO values are used to write the first read WRRO values to the first track. A second seek operation of the head positions the read element over a third track, and the third track is read to generate second write WRRO values. The second write WRRO values are used to write the first write WRRO values to the second track.
摘要翻译：公开了一种磁盘驱动器，其包括限定多个磁道的多个伺服扇区，以及包括从写入元件径向偏移的读取元件的磁头。读取元件位于第一轨道上，并且读取第一轨迹以产生第一读取楔形可重复跳动（WRRO）值。头部的第一寻找操作将读取的元素定位在第二个轨道上，并且读取第二个轨迹以产生第一个写入WRRO值。第一次写入WRRO值用于将第一个读取的WRRO值写入第一个轨道。磁头的第二次搜索操作将读取元件定位在第三磁道上，并且读取第三磁道以产生第二写WRRO值。第二次写入WRRO值用于将第一个写WRRO值写入第二个轨道。

4. 发明授权

US06965966B1 Disk drive pre-computing seek parameters for a continuation track and a next command to facilitate continuing a read-ahead or aborting the read-ahead 失效
标题翻译：磁盘驱动器预先计算寻找连续轨道的参数和下一个命令，以便于继续预读或中止预读
公开(公告)号：US06965966B1
公开(公告)日：2005-11-15
申请号：US10286682
申请日：2002-10-31
申请人： Michael S. Rothberg , Jonathan V. Nguyen , Gregory B. Thelin
发明人： Michael S. Rothberg , Jonathan V. Nguyen , Gregory B. Thelin
IPC分类号： G06F12/00 , G06F12/08
CPC分类号： G06F12/0862 , G06F12/0866
摘要： A disk drive is disclosed which pre-computes first seek parameters to seek to a continuation track storing read-ahead data, and second seek parameters to seek to a target track of a next command. An abort window is also computed for aborting a read-ahead operation early in order to seek to the target track of the next command. If the head enters the abort window, the disk drive is programmed with the second seek parameters to seek to the target track of the next command. If the read-ahead operation requires a seek to the continuation track prior to the head entering the abort window, the disk drive is programmed with the first seek parameters to seek to the continuation track.
摘要翻译：公开了一种磁盘驱动器，其预先计算第一寻找参数以寻找存储预读数据的连续轨道，以及第二寻找参数以寻找下一个命令的目标轨道。还计算中止窗口以提前中止预读操作，以便寻找下一个命令的目标轨迹。如果磁头进入中止窗口，则使用第二个查找参数对磁盘驱动器进行编程，以寻找下一个命令的目标轨道。如果预读操作需要在头进入中止窗口之前寻求继续轨道，则用第一寻道参数来编程磁盘驱动器以寻求延续轨迹。

5. 发明授权

US07679854B1 Head switch operation for a disk drive 失效
标题翻译：磁头驱动器的磁头开关操作
公开(公告)号：US07679854B1
公开(公告)日：2010-03-16
申请号：US12260919
申请日：2008-10-29
申请人： Aswartha Narayana , John Yin Kwong Li , Gary Gaoxiang Zhu , Jonathan V. Nguyen , Duc T. Phan
发明人： Aswartha Narayana , John Yin Kwong Li , Gary Gaoxiang Zhu , Jonathan V. Nguyen , Duc T. Phan
IPC分类号： G11B15/12 , G11B21/02
CPC分类号： G11B5/5547
摘要： A disk drive for implementing a head switch operation is disclosed. The disk drive comprises: an actuator; a first head and a second head attached to the actuator; a disk having a plurality of tracks; and a processor. The processor controls operations in the disk drive including: executing a head switch command from the first head to the second head; determining that a sync-up operation is not successful for the second head at a first track; applying a torque to the actuator to move the second head to a second track; and determining that the sync-up operation is successful.
摘要翻译：公开了一种用于实现磁头开关操作的磁盘驱动器。磁盘驱动器包括：致动器; 附接到致动器的第一头部和第二头部; 具有多个轨道的盘; 和处理器。处理器控制磁盘驱动器中的操作，包括：执行从第一磁头到第二磁头的磁头开关命令; 确定第一磁道在第二磁头上的同步操作不成功; 向致动器施加扭矩以将第二头部移动到第二轨道; 并确定同步操作成功。

6. 发明授权

US07330323B1 Disk drive determining a head-switch preheat period used to format a disk 有权
标题翻译：确定用于格式化磁盘的磁头开关预热周期的磁盘驱动器
公开(公告)号：US07330323B1
公开(公告)日：2008-02-12
申请号：US11169038
申请日：2005-06-28
申请人： Dalwinder Singh , Gregory B. Thelin , Jonathan V. Nguyen
发明人： Dalwinder Singh , Gregory B. Thelin , Jonathan V. Nguyen
IPC分类号： G11B5/09
CPC分类号： G11B5/455 , G11B5/59688 , G11B5/6011 , G11B20/182
摘要： A disk drive is disclosed comprising a disk having a plurality of tracks, wherein each track comprises a plurality of data sectors. The disk drive further comprises a plurality of heads, such as a top head and a bottom head. Control circuitry within the disk drive determines a head-switch preheat period used to format the disk. The head-switch preheat period is calibrated by selecting one of the heads to write a test pattern to the disk, and then preheating the selected head for a preheat period prior to reading the test pattern from the disk to generate a read signal. The head-switch preheat period is determined for the selected head in response to the read signal.
摘要翻译：公开了一种磁盘驱动器，其包括具有多个磁道的磁盘，其中每个磁道包括多个数据扇区。磁盘驱动器还包括多个磁头，例如顶部磁头和底部磁头。磁盘驱动器内的控制电路决定了用于格式化磁盘的磁头开关预热周期。通过选择其中一个头来将测试图案写入盘，然后在从盘读取测试图案之前预热所选择的头部以预热时间段来校准头部开关预热周期，以产生读取信号。响应于读取信号，为所选择的头确定头部开关预热周期。

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