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1. 发明授权

US10649655B2 Data storage system with multimedia assets 有权
公开(公告)号：US10649655B2
公开(公告)日：2020-05-12
申请号：US15282837
申请日：2016-09-30
申请人： WESTERN DIGITAL TECHNOLOGIES, INC.
发明人： Jun Xu , Shaun Astarabadi , Grant C. Mackey , Junpeng Niu , Robin O'Neill , Jie Yu
IPC分类号： G06F3/06 , G06F12/02 , H04L29/06
摘要： Systems and methods are disclosed for storing multimedia assets (or other data objects) in a storage array. Portions of the multimedia asset may be stored on different chunks of the storage drives in the storage array based on an access frequency level for a portion, an importance level for the portion, a reliability score for a chunk, and a performance score for the chunk.

2. 发明申请

US20180095665A1 DATA STORAGE SYSTEM WITH MULTIMEDIA ASSETS 审中-公开
公开(公告)号：US20180095665A1
公开(公告)日：2018-04-05
申请号：US15282837
申请日：2016-09-30
申请人： WESTERN DIGITAL TECHNOLOGIES, INC.
发明人： Jun Xu , Shaun Astarabadi , Grant C. Mackey , Junpeng Niu , Robin O'Neill , Jie Yu
IPC分类号： G06F3/06
CPC分类号： G06F3/0604 , G06F3/061 , G06F3/0614 , G06F3/064 , G06F3/0644 , G06F3/067 , G06F3/0685 , G06F3/0688 , G06F3/0689 , H04L67/42
摘要： Systems and methods are disclosed for storing multimedia assets (or other data objects) in a storage array. Portions of the multimedia asset may be stored on different chunks of the storage drives in the storage array based on an access frequency level for a portion, an importance level for the portion, a reliability score for a chunk, and a performance score for the chunk.

3. 发明授权

US09142249B1 Disk drive using timing loop control signal for vibration compensation in servo loop 有权
标题翻译：磁盘驱动器使用定时回路控制信号进行伺服回路中的振动补偿
公开(公告)号：US09142249B1
公开(公告)日：2015-09-22
申请号：US14099886
申请日：2013-12-06
申请人： Western Digital Technologies, Inc.
发明人： Jianguo Zhou , Guoxiao Guo , Donald Brunnett , Min Chen , Wei Guo , Jie Yu
IPC分类号： G11B5/02 , G11B19/247 , G11B5/012 , G11B5/596 , G11B19/04
CPC分类号： G11B19/042 , G11B5/59622 , G11B5/59627 , G11B5/59694
摘要： A disk drive is disclosed comprising a timing loop configured to generate a clock synchronized to a rotation of a disk and a servo loop configured to control an actuator to actuate a head over the disk. A timing signal generated by the timing loop is filtered with a pre-compensation filter (PCF) comprising an inverse transfer function from a delta in a rotation velocity of the disk (Δω) due to a vibration affecting the disk drive to the timing signal, and the actuator is controlled to actuate the head over the disk based on an output of the PCF.
摘要翻译：公开了一种磁盘驱动器，其包括定时回路，其被配置为产生与盘的旋转同步的时钟和被配置为控制致动器来驱动盘上的磁头的伺服回路。由定时环产生的定时信号由于影响磁盘驱动器的振动到定时的滤波器（＆Dgr;ω），由包括逆传递函数的预补偿滤波器（PCF）进行滤波信号，并且致动器被控制以基于PCF的输出来驱动磁头上的磁头。

4. 发明授权

US09058826B1 Data storage device detecting free fall condition from disk speed variations 有权
标题翻译：数据存储装置从磁盘速度变化检测自由落体状态
公开(公告)号：US09058826B1
公开(公告)日：2015-06-16
申请号：US14194059
申请日：2014-02-28
申请人： Western Digital Technologies, Inc.
发明人： Wei Guo , Jianguo Zhou , Yiming Chen , Guoxiao Guo , Jie Yu
IPC分类号： G11B21/02 , G11B5/55 , G11B20/14
CPC分类号： G11B19/043 , G11B20/18 , G11B21/12
摘要： A data storage device is disclosed comprising a disk comprising data, and a head actuated over the disk. A timing signal is generated by reading the data from the disk, and a frequency generator is adjusted based on the timing signal to generate a disk locked clock substantially synchronized to a rotation speed of the disk. A free fall condition is detected based on the timing signal, and when the free fall condition is detected the head is parked.
摘要翻译：公开了一种数据存储装置，其包括包含数据的磁盘和在磁盘上启动的磁头。通过从盘读取数据来产生定时信号，并且基于定时信号调整频率发生器，以产生基本上与盘的转速同步的盘锁定时钟。基于定时信号检测到自由落体状态，并且当检测到自由落体状态时，头被停放。

5. 发明授权

US10289310B2 Hybrid data storage system with private storage cloud and public storage cloud 有权
公开(公告)号：US10289310B2
公开(公告)日：2019-05-14
申请号：US15635056
申请日：2017-06-27
申请人： Western Digital Technologies, Inc.
发明人： Jun Xu , Wei Xi , Guoxiao Guo , Eric Bjornson , Jie Yu , Ling Chih Wei
IPC分类号： G06F3/06 , G06F11/14 , G06F21/60 , G06F21/62 , H04L29/08
摘要： Systems and methods are disclosed for accessing data on a storage system. An apparatus, such as a data storage device or a computing device, may include a memory configured to store data. The apparatus is configured to receive a request for a file stored in a storage system. The storage system includes a private storage cloud and a set of public storage clouds. The apparatus is also configured to determine whether the file is retrievable from the set of public storage clouds. If the file is retrievable from the set of public storage clouds the apparatus may determine whether access to the set of public storage clouds is faster than access to the private storage cloud and may retrieve the file from one or more of the private storage cloud and the set of public storage clouds.

6. 发明授权

US08970982B1 Disk drive compensating for non-linearity of a head based on a fly height of the head 有权
标题翻译：磁盘驱动器基于磁头的飞行高度补偿磁头的非线性
公开(公告)号：US08970982B1
公开(公告)日：2015-03-03
申请号：US14100646
申请日：2013-12-09
申请人： Western Digital Technologies, Inc.
发明人： Jianguo Zhou , Abhishek Dhanda , Eugene C. Wu , Teddy T. Chen , Sanghoon Chu , Guoxiao Guo , Jie Yu
IPC分类号： G11B21/02 , G11B21/12
CPC分类号： G11B5/5547 , G11B5/6029 , G11B5/607
摘要： A disk drive is disclosed comprising a disk comprising a plurality of servo tracks, wherein each servo track comprises a plurality of servo sectors. A position of the head is measured based on the servo sectors, and a compensated position of the head is generated based on the measured position of the head and a fly height of the head. The head is actuated over the disk based on the compensated position of the head.
摘要翻译：公开了一种磁盘驱动器，包括包括多个伺服磁道的磁盘，其中每个伺服磁道包括多个伺服扇区。基于伺服扇区测量头的位置，并且基于测量的头部位置和头部的飞行高度来产生头部的补偿位置。基于头的补偿位置，头部被驱动到盘上。

7. 发明授权

US09053712B1 Data storage device reading servo sector while writing data sector 有权
标题翻译：数据存储设备读写伺服扇区同时写数据扇区
公开(公告)号：US09053712B1
公开(公告)日：2015-06-09
申请号：US14271770
申请日：2014-05-07
申请人： Western Digital Technologies, Inc.
发明人： Guoxiao Guo , Russ A. Quisenberry , Wei Guo , Michael Chang , Jie Yu
IPC分类号： G11B21/02 , G11B5/09
CPC分类号： G11B5/012 , G11B5/02 , G11B5/4886 , G11B5/59644
摘要： A data storage device is disclosed comprising a disk surface comprising a plurality of tracks, wherein each track comprises a plurality of data sectors and a plurality of servo sectors. The data storage device further comprises a head actuated over the disk surface, the head comprising at least one read element and at least one write element. Control circuitry is configured to use the head to write to a first data sector on the disk surface while simultaneously reading from a first servo sector on the disk surface.
摘要翻译：公开了一种数据存储装置，其包括包括多个轨道的盘表面，其中每个轨道包括多个数据扇区和多个伺服扇区。数据存储装置还包括在磁盘表面上致动的磁头，磁头包括至少一个读取元件和至少一个写入元件。控制电路被配置为使用磁头写入磁盘表面上的第一数据扇区，同时从盘表面上的第一伺服扇区读取。

8. 发明授权

US09013824B1 Data storage device comprising dual read sensors and dual servo channels to improve servo demodulation 有权
标题翻译：数据存储装置包括双读取传感器和双伺服信道，以改善伺服解调
公开(公告)号：US09013824B1
公开(公告)日：2015-04-21
申请号：US14295475
申请日：2014-06-04
申请人： Western Digital Technologies, Inc.
发明人： Guoxiao Guo , Jie Yu
IPC分类号： G11B21/02 , G11B5/58 , G11B5/596
CPC分类号： G11B5/59655
摘要： A data storage device is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors, wherein each servo sector comprises a plurality of servo bursts. A head comprises a first read sensor and a second read sensor separated from the first read sensor by a cross-track spacing. A first servo channel processes a first read signal emanating from the first read sensor to generate a first position signal based on at least two servo bursts read using the first read sensor. A second servo channel processes a second read signal emanating from the second read sensor to generate a second position signal based on at least two servo bursts read using the second read sensor. A position error signal (PES) is generated based on the first position signal and the second position signal, and the head is servoed over the disk based on the PES.
摘要翻译：公开了一种数据存储设备，其包括由伺服扇区定义的多个伺服轨道的盘，其中每个伺服扇区包括多个伺服脉冲串。头包括通过交叉轨道间隔与第一读取传感器分离的第一读取传感器和第二读取传感器。第一伺服通道处理从第一读取传感器发出的第一读取信号，以基于使用第一读取传感器读取的至少两个伺服突发来产生第一位置信号。第二伺服通道处理从第二读取传感器发出的第二读取信号，以基于使用第二读取传感器读取的至少两个伺服突发来产生第二位置信号。基于第一位置信号和第二位置信号产生位置误差信号（PES），并且基于PES将磁头驱动到磁盘上。

9. 发明授权

US08970979B1 Disk drive determining frequency response of actuator near servo sample frequency 有权
标题翻译：磁盘驱动器确定执行器在伺服采样频率附近的频率响应
公开(公告)号：US08970979B1
公开(公告)日：2015-03-03
申请号：US14133417
申请日：2013-12-18
申请人： Western Digital Technologies, Inc.
发明人： Qing Wei Jia , Hui Li , Shuyu Cao , Guoxiao Guo , Jie Yu
IPC分类号： G11B5/596
CPC分类号： G11B5/59622
摘要： A disk drive is disclosed comprising a servo control system configured to control an actuator for actuating a head over a disk. Servo sectors are sampled at a servo sample frequency fs to generate a position error signal PES(k) that is filtered with a compensator to generate a first control signal u1(k). A first discrete-time sinusoid comprising a sinusoid frequency of fs+Δf is added to the first control signal u1(k) to generate a second control signal u2(k). The second control signal u2(k) is applied to the actuator, and a frequency response of the actuator is determined at the frequency |Δf|. The frequency response of the actuator is determined at the frequency fs+Δf based at least in part on the frequency response of the actuator at the frequency |Δf| and a measured signal of the servo control system when applying the second control signal u2(k) to the actuator.
摘要翻译：公开了一种磁盘驱动器，其包括伺服控制系统，该伺服控制系统被配置为控制用于在盘上驱动磁头的致动器。伺服扇区以伺服采样频率fs采样，以产生用补偿器滤波以产生第一控制信号u1（k）的位置误差信号PES（k）。将包含fs +＆Dgr; f的正弦频率的第一离散时间正弦曲线相加到第一控制信号u1（k）以产生第二控制信号u2（k）。第二控制信号u2（k）被施加到致动器，并且以| | Dgr; f |的频率确定致动器的频率响应。致动器的频率响应至少部分地基于致动器在频率| | Dgr; f |的频率响应的频率fs +＆Dgr; f来确定。以及当对致动器施加第二控制信号u2（k）时伺服控制系统的测量信号。

10. 发明授权

US10733061B2 Hybrid data storage system with private storage cloud and public storage cloud 有权
公开(公告)号：US10733061B2
公开(公告)日：2020-08-04
申请号：US15635039
申请日：2017-06-27
申请人： Western Digital Technologies, Inc.
发明人： Jun Xu , Wei Xi , Guoxiao Guo , Eric Bjornson , Jie Yu , Ling Chih Wei
IPC分类号： G06F11/14 , G06F21/60 , G06F3/06 , G06F21/62 , H04L9/08 , H04L29/08 , G06F11/10
摘要： Systems and methods are disclosed for accessing data on a storage system. An apparatus, such as a data storage device or a computing device, may include a memory configured to store data. The apparatus is configured to determine an importance level for a file to be stored in the storage system. The data storage system includes one or more private storage clouds and one or more public storage clouds. The apparatus is also configured to generate a set of recovery data chunks based on the file and the importance level. The apparatus is further configured to store the set of recovery data chunks in the set of public storage clouds. The apparatus is further configured to store at least a portion of the file in the private storage cloud.

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