公开(公告)号：US5068757A

公开(公告)日：1991-11-26

申请号：US433977

申请日：1989-11-09

申请人： Timothy C. Hughes ,  Steven P. Georgis

发明人： Timothy C. Hughes ,  Steven P. Georgis

IPC分类号： G11B5/588 ,  G11B15/467

CPC分类号： G11B5/588

摘要： In a servo tracking method and apparatus, a servo head (S) of a helical scan recorder (30) endeavors to travel equidistant between two servo signal-bearing stripes recorded on the tape (32). The recorder (30) determines a reference-crossing time at which the servo head (S) begins to cross a horizontal reference line (606) drawn with respect to the beginning of a stripe on the tape (32). The servo head (S) samples the amplitude of a servo signal provided on the tape (32) at a plurality of predetermined times after the reference-crossing time. A servo tracking circuit (175) uses the amplitude of the servo signal at the predetermined sampling times to determine how to adjust the position of said head (S) relative to the pitch of said stripe.

摘要翻译： 在伺服跟踪方法和装置中，螺旋扫描记录器（30）的伺服头（S）在记录在带子（32）上的两个伺服信号承载条带之间等距移动。 记录器（30）确定伺服头（S）开始穿过相对于带（32）上的条纹开头绘制的水平参考线（606）的参考交叉时间。 伺服头（S）在参考交叉时间之后的多个预定时间对提供在带（32）上的伺服信号的振幅进行采样。 伺服跟踪电路（175）使用在预定采样时间的伺服信号的振幅来确定如何调节所述磁头（S）相对于所述磁条间距的位置。

公开(公告)号：US5680269A

公开(公告)日：1997-10-21

申请号：US337620

申请日：1994-11-10

申请人： Steven P. Georgis ,  James Zweighaft ,  Timothy C. Hughes

发明人： Steven P. Georgis ,  James Zweighaft ,  Timothy C. Hughes

IPC分类号： G11B5/584 ,  G11B5/008 ,  G11B5/53 ,  G11B15/02 ,  G11B15/087 ,  G11B15/12 ,  G11B15/14 ,  G11B15/18 ,  G11B15/32 ,  G11B15/43 ,  G11B15/467 ,  G11B15/52 ,  G11B21/04 ,  G11B27/30

CPC分类号： G11B15/32 ,  G11B15/026 ,  G11B15/087 ,  G11B15/125 ,  G11B15/14 ,  G11B15/1875 ,  G11B15/43 ,  G11B15/4678 ,  G11B15/52 ,  G11B21/04 ,  G11B27/3027 ,  G11B5/534 ,  G11B5/0086

摘要： In a helical scan system for recording information on a storage media in a series of helical tracks, servo information written on the tracks is used to control linear velocity of the media during a write operation. Helical scan system includes a rotating drum upon which write heads and read heads circumferentially are mounted. The write heads and the read heads are positioned on the drum so that during a drum revolution a read head reads servo information recorded on a track at least 1.5 track pitches upstream from the most recently recorded track. A servo controller analyzes, during the recording operation, servo information read back by the read head subsequent to recording thereof by write head. Servo controller uses the servo information read by the read head to generate a signal for application to a motor for controlling linear velocity of the media during the write operation.

摘要翻译： 在用于在一系列螺旋轨道中的存储介质上记录信息的螺旋扫描系统中，使用写在轨道上的伺服信息来在写入操作期间控制介质的线速度。 螺旋扫描系统包括旋转鼓，圆盘上安装有写入头和读头。 写头和读头位于鼓上，使得在滚筒革命期间，读取头读取记录在轨道上的伺服信息，其中最近记录的轨道上游至少有1.5个轨距。 伺服控制器在记录操作期间分析由读写头在通过写入头记录之后由读取头读回的伺服信息。 伺服控制器使用由读取头读取的伺服信息来产生用于在写入操作期间控制介质的线速度的电动机的信号。

公开(公告)号：US5142422A

公开(公告)日：1992-08-25

申请号：US670404

申请日：1991-03-15

申请人： Christopher P. Zook ,  Robert Bordasch ,  Steven P. Georgis ,  Alireza Atai-Azimi ,  Christopher Pisciotta ,  Steve E. Haughland ,  Timothy C. Hughes

发明人： Christopher P. Zook ,  Robert Bordasch ,  Steven P. Georgis ,  Alireza Atai-Azimi ,  Christopher Pisciotta ,  Steve E. Haughland ,  Timothy C. Hughes

IPC分类号： G11B5/008 ,  G11B5/09 ,  G11B20/12 ,  G11B20/18

CPC分类号： G11B20/1883 ,  G11B20/1209 ,  G11B5/00865 ,  G11B5/09 ,  G11B2020/183 ,  G11B2220/90

摘要： A dual channel helical scan recording system (30) includes a rotating dum (36) having sets of heads (W1, W2) (R1, R2) mounted on its peripheral surface (56). A set of write heads (W1, W2) is situated on an opposite side of the drum (36) from a set of read heads (R1, R2). The write heads (W1, W2) simultaneously write two adjaent tracks (T1, T2), which are read for verification 180 detrees later by corresponding read heads (R1, R2). The heads (W1, W2, R1, R2) are strategically mounted on the drum (36) with respect to angular and axial placement, and have selected head widths and azimuthal angles. Should a block of data (317) written to tape (32) be determined, during readback, to be bad block, that bad block is subsequently rewritten on the tape (32) in the course of writing good blocks and amongst other good blocks. The rewritten block is recorded at a row position on the tape which is sufficiently displaced from the row position of a previous writing to avoid media defects occuring on the tape. In addition, a block written by a first write head (W1) and perceived as having been written as a bad block must be written by a second write head (W2) before that block is rewritten a predetermined number of times.

摘要翻译： 双通道螺旋扫描记录系统（30）包括具有安装在其外周表面（56）上的一组头（W1，W2）（R1，R2）的旋转转台（36）。 一组写头（W1，W2）位于鼓（36）的与一组读头（R1，R2）相反的一侧。 写入头（W1，W2）同时写入两个相邻磁道（T1，T2），后者由对应的读取头（R1，R2）进行读取。 头部（W1，W2，R1，R2）相对于角度和轴向布置策略地安装在滚筒（36）上，并且具有选择的头部宽度和方位角。 如果写入磁带（32）的数据块（317）在回读期间被确定为坏块，那么在编写好块和其它好的块之间，该坏块随后被重写在磁带（32）上。 重写的块被记录在磁带上的行位置，该行位置从先前写入的行位置充分移位，以避免磁带上出现介质缺陷。 此外，由第一写入头（W1）写入并且被感知为被写入坏块的块必须在该块被重写预定次数之前由第二写入头（W2）写入。

公开(公告)号：US5065261A

公开(公告)日：1991-11-12

申请号：US434008

申请日：1989-11-09

申请人： Timothy C. Hughes ,  Steven P. Georgis

发明人： Timothy C. Hughes ,  Steven P. Georgis

IPC分类号： G11B15/467 ,  G11B20/10 ,  G11B20/12 ,  G11B27/10 ,  G11B27/30

CPC分类号： G11B20/1209 ,  G11B20/10 ,  G11B27/10 ,  G11B27/3027 ,  G11B2220/90

摘要： Method and apparatus are provided for developing a digital timing signal indicative of when a head of a helical scan recorder (30) is positioned over a recorded stripe on magnetic tape (32). The method involves rotating a drum (36) upon which a head is mounted while the magnetic tape (32) is transported past the drum at a speed greater than the nominal speed at which stripes were recorded on the tape. Given the geometry of the system and format of the tape, the head is eventually able to recognize a pattern of digital data. The timing of the recognition of the pattern of digital data is used to determine the precise time, relative to each rotation of the drum (36), that the head ceases to traverse a stripe and the precise time during each rotation of the drum that the head begins to traverse a stripe. The determination of the edges of the digital timing signal is repeated upon every rotation of the drum (36). A servo timing signal for a servo head (also mounted on the drum) is generated in ninty (90) degree phase relationship to the digital timing signal.

摘要翻译： 提供了用于开发数字定时信号的方法和装置，该数字定时信号指示螺旋扫描记录器（30）的头部何时位于磁带（32）上的记录条纹上方。 该方法包括在磁带（32）以大于记录条带的标称速度的速度传送通过滚筒的情况下旋转安装有磁头的磁鼓（36）。 给定系统的几何形状和磁带的格式，磁头最终能够识别数字数据的模式。 识别数字数据图形的时间被用于确定相对于滚筒（36）的每次旋转的精确时间，头部停止穿过条纹，并且滚筒的每次旋转期间的精确时间 头开始穿过条纹。 在滚筒（36）的每次旋转时重复确定数字定时信号的边缘。 用于伺服头（也安装在滚筒上）的伺服定时信号与数字定时信号以90度相位关系产生。

公开(公告)号：US4864511A

公开(公告)日：1989-09-05

申请号：US7047

申请日：1987-01-27

申请人： Michael E. Moy ,  Stuart W. Bray ,  Paul Kummli ,  Kelly J. Beavers ,  Frank Goodknight ,  James R. Baer ,  Timothy C. Hughes ,  John L. Seabury ,  Steven F. Nugent ,  Thomas J. Studebaker ,  Eugene Kutasy ,  Richard G. Sellke

发明人： Michael E. Moy ,  Stuart W. Bray ,  Paul Kummli ,  Kelly J. Beavers ,  Frank Goodknight ,  James R. Baer ,  Timothy C. Hughes ,  John L. Seabury ,  Steven F. Nugent ,  Thomas J. Studebaker ,  Eugene Kutasy ,  Richard G. Sellke

IPC分类号： G06F3/06 ,  G11B15/68 ,  G11B27/00 ,  G11B27/36

CPC分类号： G06F3/0601 ,  G11B15/688 ,  G11B27/002 ,  G11B27/36 ,  G06F2003/0698 ,  G11B2220/41 ,  G11B2220/90

摘要： A storage and retrieval subsystem in a data processing system includes a plurality of magnetic tape cartridges, a host computer, and a library storage module storing the plurality of magnetic tape cartridges in substantially upright positions. The library storage module includes a first cylindrical array of storage cells centered about a vertical axis, a second cylindrical array concentrically arranged about the first array, and a library tape unit including a plurality of tape drives, each of the tape drives being adapted to receive one of the magnetic tape cartridges in a substantially horizontal transducing position. A robot within the library storage module is used to transfer selected ones of the magnetic tape cartridges between their substantially upright positions and the substantially horizontal transducing positions at a selected tape drive. A first controller outboard the channel communicating with the host computer is adapted to receive commands from the host computer for interfacing between the host computer and the library storage module, and a second controller inboard of the channel is adapted to receive commands from the outboard controller for interfacing between the outboard controller and the robot.

公开(公告)号：US07158338B2

公开(公告)日：2007-01-02

申请号：US10854078

申请日：2004-05-24

申请人： John A. Koski ,  Timothy C. Hughes

发明人： John A. Koski ,  Timothy C. Hughes

IPC分类号： G11B5/584 ,  G11B21/02

CPC分类号： G11B5/584 ,  G11B27/107 ,  G11B27/3027 ,  G11B2220/90

摘要： Methods and systems for sensing a position of a transducer head with respect to a storage medium. One method includes generating a read signal from a servo track stored on a magnetic storage medium. The servo track includes servo frames of magnetic flux transitions forming detectable servo marks, the servo marks forming a tone field of repeating servo marks oriented at a first azimuth angle and a mid-frame synchronization mark incorporated within the tone field, wherein the tone field provides a metric reference for dimensional measurements between features within the servo frame(s). The number of servo marks in the tone field of each servo frame along a longitudinal direction of the servo track before the mid-frame synchronization mark and after the mid-frame synchronization mark varies with lateral position.

公开(公告)号：US06985323B2

公开(公告)日：2006-01-10

申请号：US10131499

申请日：2002-04-25

申请人： Steven L. Magnusson ,  Timothy C. Hughes

发明人： Steven L. Magnusson ,  Timothy C. Hughes

IPC分类号： G11B15/14

CPC分类号： G11B5/0086 ,  G11B5/531 ,  G11B5/534 ,  G11B15/125 ,  G11B15/14 ,  G11B15/6655 ,  G11B15/6656

摘要： A helical scan tape recorder (30) comprises a rotatable scanner (85) upon which is mounted a first set of plural transducing heads (W1, W3) and a second set of transducing heads (W2, W4). A transport system transports magnetic tape (31) proximate the rotatable scanner in a manner so that information is transduced by at least one of the transducing heads during a revolution of the scanner. The sets of transducing heads are so mounted on the scanner with respect to azimuthal orientation of the transducing heads that all tracks transduced by the transducing heads have a desired width regardless of an error in physical distance separating the sets of transducing heads. In one aspect, the first set of plural transducing heads comprises a first head (W1) and a third head (W3), and the second set of plural transducing heads comprises a second head (W2) and a fourth head (W4). The sets of transducing heads are mounted on the scanner so the first head and the third head transduce respective tracks during a first angular phase of the rotation of the scanner, and so that the second head and the fourth head transduce, during a second angular phase of the rotation of the scanner, respective tracks which partially overlap a previously-transduced track. The tracks on the tape alternate according to differing azimuthal orientation.

摘要翻译： 螺旋扫描磁带录像机（30）包括可旋转的扫描器（85），其上安装有第一组多个换能头（W1，W2）和第二组换能头（W 2，W 4）。 传送系统以可旋转扫描器的方式传送磁带（31），使得信息在扫描仪的转动期间由至少一个传感头传导。 传感头组相对于转换头的方位取向安装在扫描仪上，所有的传感头转向的轨道都具有所需的宽度，而不考虑分离传感头组的物理距离的误差。 一方面，第一组多个转换头包括第一头（W 1）和第三头（W 3），并且第二组多个换能头包括第二头（W 2）和第四头（W 4）。 传感头组安装在扫描器上，使得第一头部和第三头部在扫描器的旋转的第一角度相位期间转换相应的轨道，并且使得第二头部和第四头部在第二角度相位 扫描仪旋转的各个轨道与先前转换的轨道部分重叠。 磁带上的轨道根据不同的方位取向交替。

公开(公告)号：US4577811A

公开(公告)日：1986-03-25

申请号：US706553

申请日：1985-02-28

申请人： Stuart W. Bray ,  Timothy C. Hughes ,  Susan E. Ariniello

发明人： Stuart W. Bray ,  Timothy C. Hughes ,  Susan E. Ariniello

IPC分类号： G11B15/08 ,  G11B15/67 ,  G03B1/04 ,  G11B15/32

CPC分类号： G11B15/67 ,  G11B15/08

摘要： Apparatus and methods are disclosed for properly positioning the machine reel in a magnetic tape drive containing an automatic tape threading mechanism, wherein the file reel consists of a tape cartridge with tape attached to a leader block. The automatic threading mechanism connects to the leader block and pulls the tape through the tape path to insert the leader block into the hub of the machine reel. However, before the leader block can be inserted into the machine reel hub, the machine reel must be properly aligned to receive the leader block. The present invention provides apparatus and methods for properly aligning the machine reel to receive the tape leader block. The disclosure also provides a means to detect when the last wrap of tape is being removed from the machine reel hub during an unload operation and stop the machine reel at the proper angular location so that the tape leader block can be removed from the hub without damage to the hub or the leader block.

摘要翻译： 公开了用于将机器卷盘正确地定位在包含自动带穿线机构的磁带驱动器中的装置和方法，其中文件卷筒由附接到引导块的带的带盒组成。 自动穿线机构连接到引导块，并通过磁带路径拉动磁带，将引导块插入机器卷轴的轮毂。 然而，在引导块可以插入机器卷轴毂之前，机器卷轴必须正确对齐以接收引导块。 本发明提供了用于使机器卷轴正确对准以接收带引导块的装置和方法。 本公开还提供了一种方法，用于检测在卸载操作期间胶带的最后卷绕何时从机器卷轴轮毂移除，并将机器卷轴停止在适当的角度位置，使得带引导块可以从轮毂移除而不损坏 到枢纽或领导块。

公开(公告)号：US07245453B2

公开(公告)日：2007-07-17

申请号：US11602871

申请日：2006-11-20

申请人： John A. Koski ,  Timothy C. Hughes

发明人： John A. Koski ,  Timothy C. Hughes

IPC分类号： G11B5/584

CPC分类号： G11B5/584 ,  G11B27/107 ,  G11B27/3027 ,  G11B2220/90

摘要： Methods and systems for sensing a position of a transducer head with respect to a storage medium. One method includes generating a read signal from a servo track stored on a magnetic storage medium. The servo track includes servo frames of magnetic flux transitions forming detectable servo marks, the servo marks forming a tone field of repeating servo marks oriented at a first azimuth angle and a mid-frame synchronization mark incorporated within the tone field, wherein the tone field provides a metric reference for dimensional measurements between features within the servo frame(s). The number of servo marks in the tone field of each servo frame along a longitudinal direction of the servo track before the mid-frame synchronization mark and after the mid-frame synchronization mark varies with lateral position.

公开(公告)号：US5973875A

公开(公告)日：1999-10-26

申请号：US842669

申请日：1997-04-15

申请人： Timothy C. Hughes ,  Fadi Y. Abou-Jaoude

发明人： Timothy C. Hughes ,  Fadi Y. Abou-Jaoude

IPC分类号： G11B5/027 ,  G11B5/008 ,  G11B5/48 ,  G11B5/53 ,  G11B5/588 ,  G11B15/02 ,  G11B15/18 ,  G11B15/20 ,  G11B15/467 ,  G11B15/473 ,  G11B15/60 ,  G11B27/032 ,  G11B27/036 ,  G11B27/13 ,  G11B27/36 ,  G11B33/10 ,  G11B5/584

CPC分类号： G11B15/1875 ,  G11B15/026 ,  G11B15/20 ,  G11B15/4671 ,  G11B15/4672 ,  G11B15/4673 ,  G11B15/4677 ,  G11B15/4678 ,  G11B15/4736 ,  G11B15/602 ,  G11B27/036 ,  G11B27/13 ,  G11B27/36 ,  G11B33/10 ,  G11B5/0086 ,  G11B5/4893 ,  G11B5/531 ,  G11B5/534 ,  G11B2220/90 ,  G11B27/032

摘要： Methods of calibrating a helical scan recorder include transporting a storage media past a drum at a controlled linear velocity and recording tracks on the media using a write head. During a read-after-write operation, servo signals recorded on the tracks are read. The servo signals from the tracks are used to determine an axial offset variance of the write head and a read head on the drum. In one mode, calibration is achieved for a first helical scan recorder which does not have a capstan, by installing a drum of the recorder in a second helical scan recorder, using the second recorder to record servo signals on two tracks, reading the servo signals from those two tracks in the second recorder, using the servo signals to determine axial offset variance, and storing a value indicative of axial offset variance in a memory of the first recorder. The axial offset variance is used in a write splice operation and, in one mode, to determine linear velocity of the media.

摘要翻译： 校准螺旋扫描记录器的方法包括以受控的线速度运送存储介质通过滚筒并使用写入头在介质上记录轨道。 在读写操作期间，读取记录在轨道上的伺服信号。 来自轨迹的伺服信号用于确定写头和滚筒上的读头的轴向偏移方差。 在一种模式中，通过在第二螺旋扫描记录器中安装记录器的滚筒，使用第二记录器在两个磁道上记录伺服信号，读取伺服信号，对不具有绞盘的第一螺旋扫描记录器进行校准 从第二记录器中的这两条轨道，使用伺服信号来确定轴向偏移方差，并将指示轴偏移方差的值存储在第一记录器的存储器中。 轴向偏移方差用于写接头操作，并且在一种模式下用于确定介质的线速度。