公开(公告)号：US20170004849A1

公开(公告)日：2017-01-05

申请号：US15260115

申请日：2016-09-08

Applicant: International Business Machines Corporation

Inventor： Robert G. Biskeborn ,  Jason Liang ,  Calvin S. Lo ,  Andrew C. Ting

IPC: G11B5/255

CPC classification number: G11B5/265 ,  G11B5/0083 ,  G11B5/11 ,  G11B5/1871 ,  G11B5/255 ,  G11B5/29 ,  G11B5/3109 ,  G11B5/3912 ,  G11B5/3967 ,  G11B5/4893 ,  G11B5/60

Abstract: An apparatus according to one embodiment includes a module having a substrate, read and write transducers positioned towards a media facing side of the module, and a closure. The write transducers include write poles having media facing sides with negative, zero or near-zero recession from a plane extending along the media facing side of a substrate of the module. The read transducers each have two shields. Media facing sides of the two shields are recessed a same amount from the plane, and are more recessed from the plane than the write poles.

Abstract translation: 根据一个实施例的装置包括具有基板的模块，朝向模块的面向介质侧的读取和写入换能器以及闭合件。 写入传感器包括写入磁极，其具有面向介质的侧面，从沿着模块的基板的面向介质的一侧延伸的平面的负零，零或近零退磁。 读取传感器每个都有两个屏蔽。 两个屏蔽物的面向介质的侧面从平面凹入相同的量，并且比平面写入电极更凹陷。

公开(公告)号：US20160180871A1

公开(公告)日：2016-06-23

申请号：US14908772

申请日：2013-07-31

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Brian Brong ,  Mike Alan Holmberg ,  Charles Calvin Brooks Partee ,  Paul W Poorman ,  Mike Sharrock ,  Geoff Spratt ,  Scott Swanbeck

IPC: G11B5/40 ,  G11B5/008

CPC classification number: G11B5/40 ,  G11B5/00813 ,  G11B5/0083 ,  G11B5/3106

Abstract: Techniques for protecting tape heads from wear are provided. In an example, a method includes forming a coating over elements on the magnetic tape head, wherein the elements can comprise read elements, write elements, or both and wherein the coating does not extend over adjacent tape bearing surfaces.

Abstract translation: 提供了保护磁头免受磨损的技术。 在一个示例中，一种方法包括在磁带头上的元件上形成涂层，其中元件可以包括读取元件，写入元件或两者，并且其中涂层不在相邻的带承载表面上延伸。

公开(公告)号：US08937777B2

公开(公告)日：2015-01-20

申请号：US14228167

申请日：2014-03-27

Applicant: International Business Machines Corporation

Inventor： Nhan X. Bui ,  Kevin B. Judd ,  Tomoko Taketomi

IPC: G11B27/36 ,  G11B20/10

CPC classification number: G11B5/00817 ,  G11B5/0083 ,  G11B5/09 ,  G11B5/584 ,  G11B20/10388 ,  G11B27/36

Abstract: In one embodiment, a method includes updating a standard deviation or a variance based on a current position error signal sample, where a smoothing factor applied to a subsequent calculation of the standard deviation or variance is dynamically altered based at least in part on whether a current value of the standard deviation or the variance is above or below a specified value. A determination is made as to whether the standard deviation or the variance exceeds a predetermined threshold. A stopwrite threshold is determined based on the standard deviation or the variance when the standard deviation or the variance exceeds the predetermined threshold. A determination is made as to whether the current position error signal sample exceeds the stopwrite threshold. Writing is disabled when the current position error signal sample exceeds the stopwrite threshold. Writing is enabled when the current position error signal sample does not exceed the stopwrite threshold.

Abstract translation: 在一个实施例中，一种方法包括基于当前位置误差信号样本来更新标准偏差或方差，其中至少部分地基于当前位置误差信号样本的应用于随后的标准偏差或方差的计算的平滑因子被动态地改变 标准偏差或方差的值高于或低于规定值。 确定标准偏差或方差是否超过预定阈值。 当标准偏差或方差超过预定阈值时，基于标准偏差或方差确定阻止阈值。 确定当前位置误差信号样本是否超过阻止写入阈值。 当当前位置错误信号样本超过了停止写入阈值时，写入被禁止。 当当前位置错误信号采样不超过限制写入阈值时，写入被使能。

公开(公告)号：US20140268403A1

公开(公告)日：2014-09-18

申请号：US14284231

申请日：2014-05-21

Applicant: International Business Machines Corporation

Inventor： Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

IPC: G11B15/46 ,  G11B5/008

CPC classification number: G11B15/46 ,  G11B5/00813 ,  G11B5/0083 ,  G11B5/40 ,  G11B5/60 ,  G11B15/467 ,  G11B15/52 ,  G11B15/62

Abstract: According to one embodiment, a method includes determining whether a primary velocity is valid and/or in a steady state; averaging a velocity error over a predetermined time period upon determining the primary velocity is valid and/or in a steady state; and calculating a new friction value based on the averaged velocity error.

Abstract translation: 根据一个实施例，一种方法包括确定主速度是否有效和/或处于稳定状态; 在确定一次速度有效和/或处于稳定状态时，在预定时间段内平均速度误差; 并基于平均的速度误差计算新的摩擦值。

公开(公告)号：US08810960B2

公开(公告)日：2014-08-19

申请号：US10727804

申请日：2003-12-04

Applicant: Richard H. Dee

Inventor： Richard H. Dee

IPC: G11B5/29 ,  G11B5/265 ,  G11B5/008

CPC classification number: G11B5/0083 ,  G11B5/29

Abstract: A plurality of read/write heads is disclosed for a magnetic media storage system, such as, for example a magnetic tape drive. Each head can include a plurality of data channels. In addition to enhancing data throughput, the plurality of read/write heads can be aligned to read or write bands of tracks on a magnetic tape with only one positioning mode (e.g., without coarse position actuation and control), and also obtain optimum yield and crosstalk values.

Abstract translation: 公开了用于磁介质存储系统（例如磁带驱动器）的多个读/写头。 每个头可以包括多个数据通道。 除了增强数据吞吐量之外，多个读/写头可以对准以仅一个定位模式（例如，没有粗略的位置驱动和控制）来读取或写入磁带上的磁道带，并且还获得最佳的产量和 串扰值。

公开(公告)号：US20140211335A1

公开(公告)日：2014-07-31

申请号：US14228167

申请日：2014-03-27

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Nhan X. Bui ,  Kevin B. Judd ,  Tomoko Taketomi

IPC: G11B20/10 ,  G11B27/36

CPC classification number: G11B5/00817 ,  G11B5/0083 ,  G11B5/09 ,  G11B5/584 ,  G11B20/10388 ,  G11B27/36

Abstract: In one embodiment, a method includes updating a standard deviation or a variance based on a current position error signal sample, where a smoothing factor applied to a subsequent calculation of the standard deviation or variance is dynamically altered based at least in part on whether a current value of the standard deviation or the variance is above or below a specified value. A determination is made as to whether the standard deviation or the variance exceeds a predetermined threshold. A stopwrite threshold is determined based on the standard deviation or the variance when the standard deviation or the variance exceeds the predetermined threshold. A determination is made as to whether the current position error signal sample exceeds the stopwrite threshold. Writing is disabled when the current position error signal sample exceeds the stopwrite threshold. Writing is enabled when the current position error signal sample does not exceed the stopwrite threshold.

Abstract translation: 在一个实施例中，一种方法包括基于当前位置误差信号样本更新标准偏差或方差，其中至少部分地基于当前位置误差信号样本的应用于随后的标准偏差或方差的计算的平滑因子是否动态地改变 标准偏差或方差的值高于或低于规定值。 确定标准偏差或方差是否超过预定阈值。 当标准偏差或方差超过预定阈值时，基于标准偏差或方差确定阻止阈值。 确定当前位置误差信号样本是否超过阻止写入阈值。 当当前位置错误信号样本超过了停止写入阈值时，写入被禁止。 当当前位置错误信号采样不超过限制写入阈值时，写入被使能。

公开(公告)号：US08743492B2

公开(公告)日：2014-06-03

申请号：US13554966

申请日：2012-07-20

Applicant: Nhan X. Bui ,  Kevin B. Judd ,  Tomoko Taketomi

Inventor： Nhan X. Bui ,  Kevin B. Judd ,  Tomoko Taketomi

IPC: G11B27/36

CPC classification number: G11B5/00817 ,  G11B5/0083 ,  G11B5/09 ,  G11B5/584 ,  G11B20/10388 ,  G11B27/36

Abstract: In one embodiment, a data storage system includes a head; a drive mechanism for passing a medium over the head; a controller electrically coupled to the head; logic encoded in or available to the controller for: periodically determining a stopwrite threshold based on a standard deviation or a variance at a current position error signal sample, wherein a smoothing factor applied to a subsequent calculation of the standard deviation or variance is altered based at least in part on a current magnitude of the standard deviation or the variance; determining whether the current position error signal sample exceeds the stopwrite threshold; disabling writing when the current position error signal sample exceeds the stopwrite threshold; and enabling writing when the current position error signal sample does not exceed the stopwrite threshold. Other systems, methods, and computer program products are described according to more embodiments.

Abstract translation: 在一个实施例中，数据存储系统包括头部; 用于使介质通过头部的驱动机构; 控制器电耦合到头部; 编码在或可用于控制器的逻辑，用于：基于当前位置误差信号样本的标准偏差或方差周期性地确定停止写入阈值，其中应用于随后的标准偏差或方差的计算的平滑因子基于 至少部分地基于当前的标准偏差或方差的大小; 确定当前位置误差信号样本是否超过限制写入阈值; 当当前位置错误信号样本超过限制写入阈值时禁止写入; 并且当当前位置误差信号采样不超过限制写入阈值时使能写入。 根据更多实施例描述其它系统，方法和计算机程序产品。

公开(公告)号：US20140118856A1

公开(公告)日：2014-05-01

申请号：US13660303

申请日：2012-10-25

Applicant: ORACLE INTERNATIONAL CORPORATION

Inventor： Daniel W. Underkofler

IPC: G11B19/02 ,  G11B5/008

CPC classification number: G11B5/584 ,  G11B5/00817 ,  G11B5/0083 ,  G11B15/602

Abstract: A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to dynamically adjust a lateral and/or angular position of tape to enhance tape drive performance (e.g., the ability of a tape head assembly to precisely follow one or more data and/or servo tracks on the tape). In one arrangement, the PESs and/or PES metrics are used as feedback into the system to steer the tape by moving one or more tape path guides until subsequently generated PESs or PES metrics have been optimized or have at least moved back into an acceptable range or to acceptable levels. The disclosed control system facilitates achieving increased stringencies on PES minimization that come with increased tape drive magnetic track densities.

Abstract translation: 一种用于磁带驱动器的控制系统，其利用由带驱动器的磁头组件产生的位置误差信号（PES），该磁带驱动器在磁带通过驱动器的纵向运动期间动态地调整磁带的横向和/或角度位置以增强磁带驱动 性能（例如，磁头组件精确地跟随磁带上的一个或多个数据和/或伺服磁道的能力）。 在一种布置中，PES和/或PES度量用作系统的反馈，以通过移动一个或多个磁带路径引导件来引导磁带，直到随后生成的PES或PES度量已经被优化或至少被移回到可接受的范围内 或达到可接受的水平。 所公开的控制系统有助于实现随着磁带驱动磁道密度增加而带来的PES最小化的增加的严格性。

公开(公告)号：US20120307389A1

公开(公告)日：2012-12-06

申请号：US13459367

申请日：2012-04-30

Applicant: Roy D. Cideciyan ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

Inventor： Roy D. Cideciyan ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

IPC: G11B5/02 ,  G11B5/008

CPC classification number: G11B5/0083 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/10259 ,  G11B20/1833 ,  G11B2220/956 ,  H03M13/09 ,  H03M13/27 ,  H03M13/2909 ,  H03M13/2945 ,  H03M13/6561 ,  H04L1/0042

Abstract: A method for randomizing data to mitigate false VFO detection is described. In one embodiment, such a method includes simultaneously receiving multiple input data streams. Each input data stream is associated with a different track on a magnetic tape medium. The input data streams are simultaneously scrambled to produce multiple randomized data streams. The input data streams are scrambled such that different bit patterns are produced in the randomized data streams even where corresponding bit patterns in the input data streams are identical. The randomized data streams are simultaneously written to their associated data tracks on the magnetic tape medium.

Abstract translation: 描述用于随机化数据以减轻虚假VFO检测的方法。 在一个实施例中，这种方法包括同时接收多个输入数据流。 每个输入数据流与磁带介质上的不同轨道相关联。 输入数据流被同时加扰以产生多个随机数据流。 输入数据流被加扰，使得在随机数据流中产生不同的位模式，即使输入数据流中相应的位模式是相同的。 随机数据流被同时写入到磁带介质上的相关联的数据轨道上。

公开(公告)号：US08139318B2

公开(公告)日：2012-03-20

申请号：US12686689

申请日：2010-01-13

Applicant: Robert G. Biskeborn

Inventor： Robert G. Biskeborn

IPC: G11B5/29

CPC classification number: G11B5/0083 ,  G11B5/3977

Abstract: A planar bidirectional tape head with planar read and write elements for reading and writing data on a magnetic recording tape includes a substrate, a tape bearing surface for engaging the magnetic tape, one or more write element arrays formed on the substrate, and one or more read element arrays formed on the substrate. The one or more write element arrays and the one or more read element arrays comprise plural thin film layers oriented in generally parallel relationship with the tape bearing surface.

Abstract translation: 具有用于在磁记录带上读取和写入数据的平面读和写元件的平面双向磁带头包括基板，用于接合磁带的磁带支承表面，形成在基板上的一个或多个写元件阵列，以及一个或多个 在衬底上形成的读取元件阵列。 一个或多个写入元件阵列和一个或多个读取元件阵列包括多个薄膜层，其定向为与带承载表面大致平行的关系。