公开(公告)号：US08395857B2

公开(公告)日：2013-03-12

申请号：US12941482

申请日：2010-11-08

申请人： Kezhao Zhang ,  Jizhong He ,  Shanlin Duan ,  Jane Jie Zhang ,  Zhupei Shi

发明人： Kezhao Zhang ,  Jizhong He ,  Shanlin Duan ,  Jane Jie Zhang ,  Zhupei Shi

IPC分类号： G11B27/36 ,  G11B5/09

CPC分类号： G11B27/36 ,  G11B5/455 ,  G11B5/743 ,  G11B2220/2516

摘要： Approaches for a testing device for selecting a discrete track media (DTM) format for use with a particular head of a hard-disk drive (HDD). The testing device comprises a continuous magnetic-recording disk, rotatably mounted on a spindle, which stores data using a continuous media format. The testing device also comprises a testing module configured to simulate reading data, stored using a discrete track media (DTM) format, from the continuous magnetic-recording medium. Advantageously, testing time and cost is reduced as both discrete track media (DTM) disks and expensive discrete track media (DTM) recording testing hardware are not required to select the optimal a discrete track media (DTM) format for use with a particular head of a hard-disk drive (HDD). In addition, embodiments may be used to optimize features of the tracks of the DTM disk, such as the land to groove ratio.

摘要翻译： 用于选择与硬盘驱动器（HDD）的特定头部一起使用的离散轨道介质（DTM）格式的测试设备的方法。 测试装置包括可旋转地安装在主轴上的连续磁记录盘，其使用连续的媒体格式存储数据。 测试装置还包括被配置成模拟从连续磁记录介质中使用离散轨道介质（DTM）格式存储的读取数据的测试模块。 有利的是，测试时间和成本被降低，因为不需要离散轨道介质（DTM）盘和昂贵的离散轨道介质（DTM）记录测试硬件来选择最佳的离散轨道介质（DTM）格式，以用于特定的头 硬盘驱动器（HDD）。 此外，可以使用实施例来优化DTM盘的轨道的特征，例如陆地与凹槽之比。

公开(公告)号：US08174783B2

公开(公告)日：2012-05-08

申请号：US12508363

申请日：2009-07-23

申请人： Shanlin Duan ,  Zhen Jin ,  Jane Jie Zhang ,  Kezhao Zhang

发明人： Shanlin Duan ,  Zhen Jin ,  Jane Jie Zhang ,  Kezhao Zhang

IPC分类号： G11B27/36

CPC分类号： G11B5/607 ,  G11B5/455

摘要： Magnetic disk drive systems and associated methods are described for testing magnetic disk performance for certification with a plurality of magnetic disk drive systems prior to installation. The test system may position a slider at a first spacing between the magnetic disk in the slider and simulate the recording performance of a disk drive system with the magnetic disk at the first spacing. The disk drive test system may then transfer a control signal to a heating element in the slider to move the slider to a different spacing between the magnetic disk and the slider to simulate the recording performance of another disk drive system. The test system may, thus, use a single slider to certify a magnetic disk with a plurality of disk drive systems.

摘要翻译： 描述了磁盘驱动器系统和相关方法，用于在安装之前用多个磁盘驱动器系统测试用于认证的磁盘性能。 测试系统可以将滑块定位在滑块中的磁盘之间的第一间隔处，并以第一间距模拟磁盘驱动器系统的记录性能。 然后，磁盘驱动器测试系统可以将控制信号传送到滑块中的加热元件，以将滑块移动到磁盘和滑块之间的不同间隔，以模拟另一磁盘驱动器系统的记录性能。 因此，测试系统可以使用单个滑动器来证实具有多个磁盘驱动器系统的磁盘。

公开(公告)号：US20100118423A1

公开(公告)日：2010-05-13

申请号：US12266950

申请日：2008-11-07

申请人： Shanlin Duan ,  Zhupei Shi ,  Jane Jie Zhang ,  Kezhao Zhang

发明人： Shanlin Duan ,  Zhupei Shi ,  Jane Jie Zhang ,  Kezhao Zhang

IPC分类号： G11B27/036

CPC分类号： G11B27/36 ,  G11B5/4555 ,  G11B19/048 ,  G11B20/1816 ,  G11B20/182 ,  G11B2220/2516

摘要： Methods and test systems are disclosed for determining the quality of an erase process for perpendicular magnetic recording (PMR) disks. After performing an erase process on a PMR disk and before the PMR disk is assembled into a hard disk drive, a first test pattern of magnetization pulses is written to a region of the PMR disk. A second test pattern is subsequently read from the region of the PMR disk. The second pattern of magnetization pulses is analyzed in relation to the first test pattern and measured to determine the quality of the erase process.

摘要翻译： 公开了用于确定垂直磁记录（PMR）盘的擦除处理的质量的方法和测试系统。 在PMR磁盘上执行擦除处理之后，在将PMR磁盘组装到硬盘驱动器之前，将磁化脉冲的第一测试图形写入PMR磁盘的区域。 随后从PMR磁盘的区域读取第二测试模式。 相对于第一测试图案分析磁化脉冲的第二图案，并测量以确定擦除过程的质量。

公开(公告)号：US07529049B2

公开(公告)日：2009-05-05

申请号：US11515164

申请日：2006-09-01

申请人： Shanlin Duan ,  Zhupei Shi ,  Li Tang ,  Jane Jie Zhang

发明人： Shanlin Duan ,  Zhupei Shi ,  Li Tang ,  Jane Jie Zhang

IPC分类号： G11B27/36

CPC分类号： G11B19/048

摘要： Spinstand test improvement that measures Functional Byte Error Rate (F-BER) of a disk. The F-BER is correlated to the BER of a disk. The F-BER test is faster than a BER test. The F-BER test is incorporated into a spinstand tester or the software associated with a spinstand tester.

摘要翻译： Spinstand测试改进，用于测量磁盘的功能字节错误率（F-BER）。 F-BER与磁盘的BER相关。 F-BER测试比BER测试更快。 F-BER测试被并入到一个纺锤体测试仪或与一个纺锤体测试仪相关联的软件中。

公开(公告)号：US20080062549A1

公开(公告)日：2008-03-13

申请号：US11515164

申请日：2006-09-01

申请人： Shanlin Duan ,  Zhupei Shi ,  Li Tang ,  Jane Jie Zhang

发明人： Shanlin Duan ,  Zhupei Shi ,  Li Tang ,  Jane Jie Zhang

IPC分类号： G11B27/36 ,  G11B5/09

CPC分类号： G11B19/048

摘要： Spinstand test improvement that measures Functional Byte Error Rate (F-BER) of a disk. The F-BER is correlated to the BER of a disk. The F-BER test is faster than a BER test. The F-BER test is incorporated into a spinstand tester or the software associated with a spinstand tester.

摘要翻译： Spinstand测试改进，用于测量磁盘的功能字节错误率（F-BER）。 F-BER与磁盘的BER相关。 F-BER测试比BER测试更快。 F-BER测试被并入到一个纺锤体测试仪或与一个纺锤体测试仪相关联的软件中。

公开(公告)号：US07173415B1

公开(公告)日：2007-02-06

申请号：US11189594

申请日：2005-07-26

申请人： Shanlin Duan ,  Jizhong He ,  Zhupei Shi ,  Jane Jie Zhang

发明人： Shanlin Duan ,  Jizhong He ,  Zhupei Shi ,  Jane Jie Zhang

IPC分类号： G01R33/12

CPC分类号： G01R33/1207 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/4555 ,  G11B2005/001 ,  G11B2005/0021

摘要： A magnetic test module runs on a spin stand to detect amplitude decay and noise evolution at the same time. Signal-to-noise ratio (SNR) decay is directly measured. The recording performance is correlated better with SNR instead of signal only. The thermal stability of the system is evaluated more accurately with this SNR decay method. A heater is placed under the media disk, and a remote sensing thermometer and temperature controller form a subsystem to set up desired environmental temperature. The heater creates a heated band and the read/write head flies above the heated band. The temperature control system may be removed when SNR decay measurement is performed under room temperature.

摘要翻译： 磁性测试模块在旋转架上运行，以同时检测振幅衰减和噪声演变。 直接测量信噪比（SNR）衰减。 记录性能与SNR而不是仅信号相关性更好。 采用这种SNR衰减方法，更准确地评估了系统的热稳定性。 将加热器放置在介质盘下方，并且遥感温度计和温度控制器形成子系统以建立所需的环境温度。 加热器产生加热带，读/写头飞过加热带。 当在室温下进行SNR衰减测量时，可以去除温度控制系统。

公开(公告)号：US20110019298A1

公开(公告)日：2011-01-27

申请号：US12508363

申请日：2009-07-23

申请人： Shanlin Duan ,  Zhen Jin ,  Jane Jie Zhang ,  Kazhao Zhang

发明人： Shanlin Duan ,  Zhen Jin ,  Jane Jie Zhang ,  Kazhao Zhang

IPC分类号： G11B27/36

CPC分类号： G11B5/607 ,  G11B5/455

摘要： Magnetic disk drive systems and associated methods are described for testing magnetic disk performance for certification with a plurality of magnetic disk drive systems prior to installation. The test system may position a slider at a first spacing between the magnetic disk in the slider and simulate the recording performance of a disk drive system with the magnetic disk at the first spacing. The disk drive test system may then transfer a control signal to a heating element in the slider to move the slider to a different spacing between the magnetic disk and the slider to simulate the recording performance of another disk drive system. The test system may, thus, use a single slider to certify a magnetic disk with a plurality of disk drive systems.

摘要翻译： 描述了磁盘驱动器系统和相关方法，用于在安装之前用多个磁盘驱动器系统测试用于认证的磁盘性能。 测试系统可以将滑块定位在滑块中的磁盘之间的第一间隔处，并以第一间距模拟磁盘驱动器系统的记录性能。 然后，磁盘驱动器测试系统可以将控制信号传送到滑块中的加热元件，以将滑块移动到磁盘和滑块之间的不同间隔，以模拟另一磁盘驱动器系统的记录性能。 因此，测试系统可以使用单个滑动器来证实具有多个磁盘驱动器系统的磁盘。

公开(公告)号：US20120113538A1

公开(公告)日：2012-05-10

申请号：US12941482

申请日：2010-11-08

申请人： Kezhao Zhang ,  Jizhong He ,  Shanlin Duan ,  Jane Jie Zhang ,  Zhupei Shi

发明人： Kezhao Zhang ,  Jizhong He ,  Shanlin Duan ,  Jane Jie Zhang ,  Zhupei Shi

IPC分类号： G11B27/36

CPC分类号： G11B27/36 ,  G11B5/455 ,  G11B5/743 ,  G11B2220/2516

摘要： Approaches for a testing device for selecting a discrete track media (DTM) format for use with a particular head of a hard-disk drive (HDD). The testing device comprises a continuous magnetic-recording disk, rotatably mounted on a spindle, which stores data using a continuous media format. The testing device also comprises a testing module configured to simulate reading data, stored using a discrete track media (DTM) format, from the continuous magnetic-recording medium. Advantageously, testing time and cost is reduced as both discrete track media (DTM) disks and expensive discrete track media (DTM) recording testing hardware are not required to select the optimal a discrete track media (DTM) format for use with a particular head of a hard-disk drive (HDD). In addition, embodiments may be used to optimize features of the tracks of the DTM disk, such as the land to groove ratio.

摘要翻译： 用于选择与硬盘驱动器（HDD）的特定头部一起使用的离散轨道介质（DTM）格式的测试设备的方法。 测试装置包括可旋转地安装在主轴上的连续磁记录盘，其使用连续的媒体格式存储数据。 测试装置还包括被配置成模拟从连续磁记录介质中使用离散轨道介质（DTM）格式存储的读取数据的测试模块。 有利的是，测试时间和成本被降低，因为不需要离散轨道介质（DTM）盘和昂贵的离散轨道介质（DTM）记录测试硬件来选择最佳的离散轨道介质（DTM）格式，以用于特定的头 硬盘驱动器（HDD）。 此外，可以使用实施例来优化DTM盘的轨道的特征，例如陆地与凹槽之比。

公开(公告)号：US07271967B2

公开(公告)日：2007-09-18

申请号：US10975259

申请日：2004-10-28

申请人： Zhupei Shi ,  Li Tang ,  Jane Jie Zhang ,  Shanlin Duan

发明人： Zhupei Shi ,  Li Tang ,  Jane Jie Zhang ,  Shanlin Duan

IPC分类号： G11B27/36 ,  G11B5/02

CPC分类号： G11B19/04 ,  G11B5/4555 ,  G11B20/1816

摘要： A method for determining whether a spike in a read back signal from a read head positioned over a perpendicular recording disk having a magnetically soft underlayer (SUL) is caused by a defect in the SUL or by a thermal asperity (TA). A first read back signal with the spike is obtained in the absence of a local magnetic field near the read head. Then, a permanent magnet or electromagnet is used to induce a small local magnetic field by the read head, and a second signal is obtained. If the signals are substantially similar, a thermal asperity is indicated. Otherwise a defect in the 13 magnetically soft underlayer of the disk is indicated.

摘要翻译： 一种用于确定来自位于具有磁软底层（SUL）的垂直记录盘上的读头的回读信号中的尖峰是否由SUL中的缺陷或由热凹凸（TA）引起的方法。 在读磁头附近没有局部磁场的情况下获得具有尖峰的第一回读信号。 然后，使用永磁体或电磁体通过读取头来引起小的局部磁场，并获得第二信号。 如果信号基本相似，则表示热不均匀性。 否则表示磁盘的13个软磁性底层的缺陷。

公开(公告)号：US08102613B2

公开(公告)日：2012-01-24

申请号：US12567262

申请日：2009-09-25

申请人： Shanlin Duan ,  Zhen Jin ,  Jane Jie Zhang ,  Kezhao Zhang

发明人： Shanlin Duan ,  Zhen Jin ,  Jane Jie Zhang ,  Kezhao Zhang

IPC分类号： G11B27/36

CPC分类号： G11B20/10009 ,  G11B5/012 ,  G11B20/10305 ,  G11B20/1049 ,  G11B2020/1238 ,  G11B2020/1298 ,  G11B2220/2516

摘要： Track pitch in a hard disk drive is selected to satisfy the requirements of both off-track capacity (OTC) and adjacent track interference (ATI). The invention separately measures the track pitch requirements for OTC and ATI. The track pitch for the drive is set with the larger of the OTC and ATI track pitches. The OTC track pitch is measured with a 747 curve, and the ATI track pitch is measured by the positions of adjacent tracks at which the on-track error rate is not worse than a given value after the targeted number of adjacent track writes in the ATI requirement.

摘要翻译： 选择硬盘驱动器中的音高以满足偏离轨道容量（OTC）和相邻轨道干扰（ATI）的要求。 本发明分别测量OTC和ATI的轨道间距要求。 驱动器的轨道间距用OTC和ATI轨道间距较大设置。 使用747曲线测量OTC轨道间距，并且通过在ATI中的目标数量的相邻轨道写入之后轨道误差率不比给定值更差的相邻轨道的位置来测量ATI轨道间距 需求。