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31. 发明申请

US20050069298A1 System and method for writing data to HDD in bands 失效
标题翻译：将数据写入磁带的系统和方法
公开(公告)号：US20050069298A1
公开(公告)日：2005-03-31
申请号：US10674093
申请日：2003-09-29
申请人： Prakash Kasiraj , Richard New , Jorge de Souza , Mason Williams
发明人： Prakash Kasiraj , Richard New , Jorge de Souza , Mason Williams
IPC分类号： G11B5/09 , G11B20/10 , G11B20/12 , G11B27/11 , H04N5/781 , G11B5/02
CPC分类号： G11B27/11 , G11B5/012 , G11B20/1217 , G11B2020/1238 , G11B2020/1298 , G11B2220/2516 , G11B2220/65
摘要： Data is written to a hard disk drive using shingled writing principles, i.e., each data track is partially overwritten when an immediately contiguous data track is written. Two or more contiguous data tracks establish a band, and a band may store data from one and only one file, such as an AV file.
摘要翻译：数据被写入硬盘驱动器，使用着色的写入原理，即当紧紧连续的数据磁道被写入时，每个数据磁道被部分重写。两个或更多个连续的数据轨道建立一个频带，并且频带可以存储来自一个文件（例如AV文件）的数据。

32. 发明授权

US06259583B1 Laminated yoke head with a domain control element 失效
标题翻译：具有域控制元件的层叠轭头
公开(公告)号：US06259583B1
公开(公告)日：2001-07-10
申请号：US09154527
申请日：1998-09-16
申请人： Robert Edward Fontana, Jr. , Yimin Hsu , Prakash Kasiraj , Mason Lamar Williams
发明人： Robert Edward Fontana, Jr. , Yimin Hsu , Prakash Kasiraj , Mason Lamar Williams
IPC分类号： G11B5147
CPC分类号： G11B5/3153 , G11B5/3113 , G11B5/3156
摘要： The present invention is a magnetic head which has a preferably planar pole member having a yoke and a tip with a first planar pole P1 and a second planar pole P2 positioned above pole P1. The pole member is built up of two types of layers: a first type of layer with high magnetic permeability &mgr; and low anisotropy Hk, with the easy axis oriented substantially perpendicular to the flux propagation direction to ensure rapid response, and a second layer type which is non-magnetic. The magnetic head also has a domain control element whose magnetization in the vicinity of the pole tip P2 and in the absence of applied field is aligned along the length of the element so as to facilitate the conduction of flux between poles P1 and P2. The domain control element can be a non-laminated element made of a material with high saturation magnetization MS such as NiFe, Ni80Fe20, Ni45Fe55, NiFeCo, FeCo, CoZrNb, FeAlN and FeTaN and proper dimensioning of the element further increases the flux conduction efficiency.
摘要翻译：本发明是一种磁头，其具有优选的具有磁轭的平面磁极部件和具有位于磁极P1上方的第一平面磁极P1和第二平面磁极P2的末端。极构件由两种类型的层构成：具有高磁导率μm和低各向异性H k的第一类型的层，易轴定向为基本上垂直于磁通传播方向，以确保快速响应，以及第二层类型是非磁性的。磁头还具有域控制元件，其磁极尖端P2附近的磁化和不存在施加磁场的磁化沿着元件的长度排列，以便于磁极P1和P2之间的磁通传导。域控制元件可以是由诸如NiFe，Ni80Fe20，Ni45Fe55，NiFeCo，FeCo，CoZrNb，FeAlN和FeTaN的高饱和磁化MS的材料制成的非层叠元件，并且元件的适当尺寸进一步增加了通量传导效率。

33. 发明授权

US6137644A Method for adaptive formatting and track traversal in data storage devices 失效
标题翻译：数据存储设备中自适应格式化和跟踪遍历的方法
公开(公告)号：US6137644A
公开(公告)日：2000-10-24
申请号：US081735
申请日：1998-05-19
申请人： Steven R. Hetzler , Prakash Kasiraj , Richard M. H. New
发明人： Steven R. Hetzler , Prakash Kasiraj , Richard M. H. New
IPC分类号： G11B5/012 , G11B5/55 , G11B20/12 , G11B5/09
CPC分类号： G11B20/1258 , G11B20/18 , G11B2020/10916 , G11B2020/1238 , G11B2220/2516 , G11B5/012 , G11B5/5547
摘要： A method for adaptively formatting the multiple surfaces of data storage devices such as hard drives. The method ensures that all the drives have the same total data capacity and that the capacity in each data rate is the same from drive to drive. The method includes the step of dividing the data surfaces into warm and cold surfaces using a surface quality measurement. All cold surfaces are formatted with a predetermined cold format and all warm surfaces are formatted with a predetermined warm format. The cold and warm formats have different data capacities by means of different zone layouts, a different number of error correction code bytes per data block, or different track pitches. A second embodiment uses one of three different formats for each surface: cold, nominal, or hot. The cold and hot formats are designed to be mutually compensating in terms of data capacity and each drive has an equal number of cold and hot surfaces. Therefore, each drive has a total data capacity equal to a drive having only nominally formatted surfaces. Preferably, one surface is formatted cold, and one surface is formatted hot, with the rest formatted according to a nominal format. Also disclosed is a method of traversing the tracks of a drive formatted according to the invention. The traversal method uses cylinder access mode or zone access mode traversal for each group of like-formatted surfaces, thus minimizing seek times.
摘要翻译：一种用于自适应地格式化数据存储设备（例如硬盘驱动器）的多个表面的方法。该方法确保所有驱动器具有相同的总数据容量，并且每个数据速率的容量从驱动器到驱动器都相同。该方法包括使用表面质量测量将数据表面分成温和冷表面的步骤。所有冷表面均以预定的冷格式进行格式化，所有暖面都以预定的温格格式进行格式化。冷和暖格式通过不同的区域布局，每个数据块的不同数量的纠错码字节或不同的轨道间距具有不同的数据容量。第二实施例对于每个表面使用三种不同格式之一：冷，标称或热。冷和热格式被设计为在数据容量方面相互补偿，并且每个驱动器具有相同数量的冷热表面。因此，每个驱动器的总数据容量等于仅具有标称格式的表面的驱动器。优选地，一个表面被格式化为冷，并且一个表面被格式化为热，其余表格根据标称格式格式化。还公开了一种遍历根据本发明格式化的驱动器的轨道的方法。遍历方法使用圆柱体访问模式或区域访问模式遍历每组相似格式的表面，从而最小化查找时间。

34. 发明授权

US5777815A Disk drive with shock detection based on thermoresistive signal from magnetoresistive head 失效
标题翻译：基于磁阻头的耐热信号的磁盘驱动器
公开(公告)号：US5777815A
公开(公告)日：1998-07-07
申请号：US664960
申请日：1996-06-13
申请人： Prakash Kasiraj , Steven Wayne Meeks , Timothy Clark Reiley
发明人： Prakash Kasiraj , Steven Wayne Meeks , Timothy Clark Reiley
IPC分类号： G11B19/00 , G11B5/55 , G11B21/21 , G11B21/02
CPC分类号： G11B5/5582
摘要： A magnetic recording disk drive with a magnetoresistive (MR) read sensor or head has a shock and vibration detection circuitry responsive to a thermoresistive signal contained in the signal from the head. The MR head is heated by an electrical bias current and is supported on the head carrier near the surface of the disk. External shock or vibration to the disk drive alters the spacing between the carrier and the disk, which causes fluctuations in the head temperature due to cooling of the heated head by the disk. These temperature fluctuations are reflected in the signal from the head as a thermoresistive signal comprising modulation of a baseline voltage level. The shock detection circuitry compares positive and negative excursions of this thermoresistive signal with a predetermined threshold voltage level. When the threshold is exceeded, indicating an external shock or vibration in excess of an allowable limit, writing of data is inhibited.
摘要翻译：具有磁阻（MR）读取传感器或磁头的磁记录盘驱动器具有响应于来自磁头的信号中包含的热电阻信号的冲击和振动检测电路。 MR头由电偏置电流加热，并被支撑在靠近盘表面的头托架上。对磁盘驱动器的外部冲击或振动会改变载体和磁盘之间的间距，这会导致磁头温度波动，这是由于加热磁头由磁盘冷却。这些温度波动反映在来自头部的信号中，作为包括基线电压电平调制的热电阻信号。冲击检测电路将该热阻信号的正偏移和负偏移与预定的阈值电压水平进行比较。当超过阈值时，表示超出允许极限的外部冲击或振动，禁止写入数据。

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