公开(公告)号：US20040252401A1

公开(公告)日：2004-12-16

申请号：US10801403

申请日：2004-03-16

申请人： FUJITSU LIMITED

发明人： Yukio Abe ,  Shigenori Yanagi

IPC分类号： G11B021/02 ,  G11B027/36 ,  G11B019/04

CPC分类号： G11B27/36 ,  G11B5/5582 ,  G11B19/04 ,  G11B21/083

摘要： A shock detection device can detect a slight shock without mis-detection of shocks due to noise in a shock sensor signal. The shock detection device is adapted to output a shock detection signal for stopping writing into a disk medium when a shock applied to the disk medium satisfies a prescribed condition. The shock detection device includes a shock sensor that detects a shock applied to the disk medium and outputs a corresponding shock sensor signal, a variable shock detection slice value setting part that sets a threshold for the shock sensor signal based on a position error signal, a shock sensor signal correction part that outputs, as a new shock sensor signal, a signal by removing noise generated in synchronization with writing from the shock sensor signal, and a shock determining part that outputs a shock detection signal when the shock sensor signal exceeds the variable shock detection slice value.

摘要翻译： 冲击检测装置可以检测到轻微的冲击，而不会由于冲击传感器信号中的噪声而误检。 冲击检测装置适用于当施加到盘介质的冲击满足规定条件时输出用于停止写入盘介质的冲击检测信号。 冲击检测装置包括：震动传感器，其检测施加到盘介质的冲击并输出相应的震动传感器信号;可变冲击检测切片值设定部，其基于位置误差信号设定冲击传感器信号的阈值; 冲击传感器信号校正部分，通过去除与冲击传感器信号的写入同步产生的噪声作为新的冲击传感器信号输出信号;以及冲击确定部，其在冲击传感器信号超过变量时输出冲击检测信号 休克检测切片值。

公开(公告)号：US20040212361A1

公开(公告)日：2004-10-28

申请号：US10421241

申请日：2003-04-23

发明人： FongKheon Chong ,  Edward YinKong Hew ,  SanYuan Liew ,  CheeFong Oh ,  YoiSeng Yee

IPC分类号： G01R033/12 ,  G11B027/36

CPC分类号： G11B27/36 ,  G11B5/455 ,  G11B2005/001

摘要： A method and apparatus produce a read signal using a read head. A variable gain value is set that is used by a variable gain amplifier to amplify the read signal. The variable gain value is used to determine whether the head is functioning properly.

摘要翻译： 方法和装置使用读取头产生读取信号。 设置可变增益值，可变增益放大器用于放大读取信号。 可变增益值用于确定磁头是否正常工作。

公开(公告)号：US20040179288A1

公开(公告)日：2004-09-16

申请号：US10753601

申请日：2004-01-08

申请人： International Business Machines Corporation

发明人： Naoyuki Kagami ,  Masayuki Kanamaru ,  Shunichiroh Ohta ,  Akira Tokizono ,  Toshihiko Tsunokawa

IPC分类号： G11B005/09 ,  G11B027/36

CPC分类号： G11B5/012 ,  G11B5/41 ,  G11B5/54 ,  G11B21/22 ,  G11B33/14 ,  G11B33/1446

摘要： A method and apparatus for use with a rotating storage device. The rotating storage device includes a storage medium driven to rotate, a head for reading and writing information on the storage medium and a ramped loading mechanism in which the head is stored. In accordance with the method of the present invention, the head is loaded from the ramped loading mechanism onto the storage medium. Next, location information stored in said storage medium via said head is read. A location of the head is then retained for a predetermined period above a track of a region other than a valid storage region of said storage medium after successfully reading the location information.

摘要翻译： 一种与旋转存储装置一起使用的方法和装置。 旋转存储装置包括被驱动旋转的存储介质，用于在存储介质上读取和写入信息的磁头以及其中存储磁头的倾斜加载机构。 根据本发明的方法，将头从斜坡加载机构装载到存储介质上。 接下来，读取通过所述头存储在所述存储介质中的位置信息。 在成功读取位置信息之后，头部的位置被保持在除了所述存储介质的有效存储区域之外的区域的轨道上方的预定时段。

公开(公告)号：US20040085670A1

公开(公告)日：2004-05-06

申请号：US10425996

申请日：2003-04-29

申请人： Seagate Technology LLC

发明人： Xinwei Li ,  Huan Tang ,  Jing Gui

IPC分类号： G11B021/02 ,  G11B027/36

CPC分类号： G11B27/36 ,  G11B5/012 ,  G11B5/105 ,  G11B5/3133 ,  G11B5/39 ,  G11B5/40 ,  G11B5/455 ,  G11B5/4886 ,  G11B5/58 ,  G11B2005/001 ,  G11B2005/0021

摘要： Disclosed is a method measuring the height of a magneto-resistive element (MRE) on a padded slider in a disc drive based on a change in the resistance of the MRE. During operation of the disc drive a biasing current is applied to the MRE head. Next a resistance value of the MRE head is calculated by determining the voltage drop across the MRE head. The resistance of the MRE head is dependent upon its temperature. The temperature of the MRE lowers as its proximity to the disc increases, as the cooler disc surface acts as a conduit drawing heat away from the MRE. This measured resistance value is compared to a threshold value. The threshold value is based upon the resistance of the MRE head at a threshold temperature, which corresponds to a specific distance away from the disc surface. If the measured resistance is lower than the threshold resistance the method outputs an indication to a user that the drive is in danger of failing.

摘要翻译： 公开了一种基于MRE的电阻的变化来测量盘驱动器中的垫片滑块上的磁阻元件（MRE）的高度的方法。 在磁盘驱动器的操作期间，偏置电流被施加到MRE磁头。 接下来，通过确定跨越MRE头的电压降来计算MRE磁头的电阻值。 MRE头的电阻取决于其温度。 随着冷却盘表面作为将热量从MRE拉出的管道，MRE的温度随着其靠近盘的速度而降低。 将该测量的电阻值与阈值进行比较。 阈值基于MRE头在阈值温度下的电阻，其对应于远离盘表面的特定距离。 如果测量的电阻低于阈值电阻，则该方法向用户输出指示变频器有故障危险的指示。

公开(公告)号：US20040075936A1

公开(公告)日：2004-04-22

申请号：US10651044

申请日：2003-08-29

申请人： Samsung Electronics Co., Ltd.

发明人： Jae-Sung Lee

IPC分类号： G11B005/596 ,  G11B027/36

CPC分类号： G11B20/1816 ,  G11B5/012 ,  G11B20/10

摘要： A method of reproducing data and a control device using a controllable dummy read gate. In the method of reproducing data, at least one of a pulse width, a pulse generating location and a number of pulses is controlled so that a dummy read gate is generated. Then, a read gate for reproducing a target sector is generated, and data is reproduced using the read gate. According to the method, the pulse width of the dummy read gate is generated, a location of the defect sector is avoided and error estimation is decreased. Further, in a case where it is determined that the defect sector or signal distortion exists, the read error is prevented by adjusting the pulse generating location of the dummy read gate.

摘要翻译： 一种再现数据的方法和使用可控虚读门的控制装置。 在再现数据的方法中，控制脉冲宽度，脉冲产生位置和脉冲数中的至少一个，从而产生伪读取门。 然后，生成用于再现目标扇区的读取门，并且使用读取门再现数据。 根据该方法，生成伪读取门的脉冲宽度，避免缺陷扇区的位置，降低误差估计。 此外，在确定存在缺陷扇区或信号失真的情况下，通过调整虚拟读取门的脉冲产生位置来防止读取错误。

公开(公告)号：US20040032681A1

公开(公告)日：2004-02-19

申请号：US10219893

申请日：2002-08-15

申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

发明人： Gordon James Smith ,  Molly Smith

IPC分类号： G11B027/36 ,  G11B021/02

CPC分类号： G11B27/36 ,  G11B5/40 ,  G11B5/6029 ,  G11B21/21 ,  G11B2220/20

摘要： A method and apparatus are provided for implementing in situ low flyheight warning in a direct access storage device (DASD). For each head in the DASD, a readback amplitude ratio is identified from two different disk radii. The initial ratio value is stored for each head in the DASD. During operation of the DASD, readback amplitude is monitored and an operating readback amplitude ratio is identified from two different disk radii. A change between the initial ratio value and the operating readback ratio is calculated and compared with a threshold value to identify a low-flying slider. A warning is generated responsive to the change value being greater than the threshold value.

摘要翻译： 提供了一种用于在直接存取存储设备（DASD）中实现原位低飞行高度警告的方法和装置。 对于DASD中的每个头，从两个不同的磁盘半径识别回读振幅比。 为DASD中的每个头存储初始比率值。 在DASD的操作期间，监视回读幅度，并从两个不同的磁盘半径识别运行的回读幅度比。 计算初始比值与运行回读比之间的变化，并将其与阈值进行比较以识别低飞行滑块。 响应于变化值大于阈值产生警告。

公开(公告)号：US20030223141A1

公开(公告)日：2003-12-04

申请号：US10313537

申请日：2002-12-05

申请人： Hitachi, Ltd.

发明人： Kenmei Masuda ,  Shigeru Yamazaki ,  Hidekazu Takeda ,  Hideki Maruyama ,  Toshio Tsuchiya

IPC分类号： G11B027/36 ,  G11B005/09

CPC分类号： G11B27/36 ,  G11B5/0086 ,  G11B5/035 ,  G11B5/09 ,  G11B5/455 ,  G11B15/087 ,  G11B20/10009 ,  G11B20/1816 ,  G11B2005/0018 ,  G11B2220/90

摘要： It is desirable to set an optimum bias current of an MR head in accordance with changes in MR head height, the wear difference of an MR element and the characteristics of the magnetic tape. In the present invention, test track 3 is provided in a beginning-of-tape position of a magnetic tape for setting a bias current for each of MR heads 11 and 12. A test signal is recorded on and reproduced from the test track before recording or reproducing data on/from data track 2. After detecting an error rate or a waveform asymmetry, the bias current is set in such a manner as to set the error rate or the waveform asymmetry in a predetermined range. The optimum current value is stored in memory 24, and the stored value is read out to set a bias current in a subsequent recording or reproduction.

摘要翻译： 期望根据MR磁头高度的变化，MR元件的磨损差和磁带的特性来设置MR磁头的最佳偏置电流。 在本发明中，测试轨道3设置在用于设置每个MR磁头11和12的偏置电流的磁带的磁头位置。测试信号在记录之前被记录在测试轨道上并从测试轨道再现 或在数据轨道2上再现数据。在检测到错误率或波形不对称之后，偏置电流被设置为将错误率或波形不对称设置在预定范围内。 将最佳电流值存储在存储器24中，并且读出存储的值以在随后的记录或再现中设置偏置电流。

公开(公告)号：US20030218815A1

公开(公告)日：2003-11-27

申请号：US10405873

申请日：2003-04-02

发明人： David Loh ,  SanYuan Liew ,  Myint Ngwe ,  FongKheon Chong ,  EngHock Lim

IPC分类号： G11B027/36 ,  G11B021/02

CPC分类号： G11B5/6005 ,  G11B5/58 ,  G11B27/36

摘要： A method for monitoring a data storage medium is provided in which a virtual head fly profile is measured. In addition, a data storage device for implementing the monitoring method is provided.

摘要翻译： 提供了一种用于监视数据存储介质的方法，其中测量虚拟头部飞行剖面。 另外，提供了一种用于实现监视方法的数据存储装置。

公开(公告)号：US20030214745A1

公开(公告)日：2003-11-20

申请号：US10150676

申请日：2002-05-17

发明人： Ming Ho Lau

IPC分类号： G11B019/02 ,  G11B027/36

CPC分类号： G11B5/00813 ,  G11B5/4893 ,  G11B15/62 ,  G11B2005/001

摘要： A thinfilm magnetic head for tape drives that enables onsite, real time temperature monitoring of the head-media interface. The head includes a media interface contacting a data bearing surface of the tape. A thinfilm, read-write element and a thinfilm sensor of a thermosensor are positioned on the head-media interface. The thermosensor generates a signal based on the temperature of the media interface. The media interface includes an active island and an optional inactive island positioned transverse to the tape travel path with the read-write element in the active island. The sensor may be placed on the inactive island or on the active island adjacent the read-write element. In one embodiment, a plurality of read-write elements and thermosensors are provided and sensors of the thermosensors are positioned on the inactive island and/or the active island among or between the read-write elements or adjacent an end element.

摘要翻译： 用于磁带驱动器的薄膜磁头，可实现头对媒体接口的现场实时温度监控。 头部包括接触带的数据承载表面的介质接口。 热敏传感器的薄膜，读写元件和薄膜传感器位于头 - 介质界面上。 热敏传感器基于介质接口的温度产生信号。 媒体接口包括活动岛和可选的不活动岛，其横向于磁带行进路径，读写元件位于活动岛中。 传感器可以放置在非活动岛上或邻近读写元件的有源岛上。 在一个实施例中，提供多个读写元件和热敏传感器，并且热敏传感器的传感器位于读写元件之间或相邻于端元件之间或之间的无源岛和/或有源岛上。

公开(公告)号：US20030189776A1

公开(公告)日：2003-10-09

申请号：US10407423

申请日：2003-04-07

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Osamu Iwasaki

IPC分类号： G11B005/02 ,  G11B027/36

CPC分类号： G11B5/78 ,  G11B5/00813 ,  G11B27/36 ,  G11B2005/001

摘要： The evaluation reference tape includes at least one recess formed on a magnetic recording layer of a magnetic tape by processing the magnetic recording layer. In the method and apparatus for manufacturing the magnetic recording layer, at least one recess is formed on the magnetic recording layer of the magnetic tape by a laser beam or laser beams in a visible region, an ultraviolet region or both which is incident on the magnetic recording layer of the magnetic tape while the magnetic tape is transported in the longitudinal direction. The evaluation reference tape can perform sensitivity correction of a dropout testing apparatus in accordance with a depth or size of a defect of the magnetic tape and evaluation of the recording/replaying system of the magnetic tape without destroying the evaluation reference tape itself. The method and apparatus can efficiently manufacture the evaluation reference tape.