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    POWER-OFF MOTOR DECELERATION CONTROL SYSTEM
    22.
    发明申请
    POWER-OFF MOTOR DECELERATION CONTROL SYSTEM 审中-公开
    断电电机减速控制系统

    公开(公告)号：WO1995013650A1

    公开(公告)日：1995-05-18

    申请号：PCT/US1994012920

    申请日：1994-11-10

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  ZWEIGHAFT, James

    IPC: H02P05/04

    CPC classification number: H02P29/025 ,  G11B15/026 ,  G11B15/1808 ,  G11B15/48 ,  H02P6/34 ,  Y10S388/904

    Abstract: A system (20) for controlling deceleration of a motor (22) during an abrupt power-off condition includes a processor (40), a motor control circuit (50), and a secondary power source (70). During normal power-on operation and based on currently prevailing operation parameters, processor (40) routinely generates a contingent motor-governing deceleration signal for potential use in governing motor (22) should the power-off condition occur. In response to the occurence of a power-off condition, motor control circuit (50) controls motor (22) in accordance with the contingent motor-governing deceleration signal to achieve orderly deceleration. Secondary power supply circuit (70) provides power to motor control circuit (50) during the power-off condition.

    Abstract translation: 用于在突然断电状态期间控制电动机（22）减速的系统（20）包括处理器（40），电机控制电路（50）和次级电源（70）。 在正常上电操作期间，并且基于当前主要的操作参数，处理器（40）如果发生掉电状况，则常规地产生用于控制电动机（22）中的潜在用途的或有的电动机控制减速信号。 响应于断电状态的发生，马达控制电路（50）根据马达控制减速信号来控制马达（22），以实现有序的减速。 次级电源电路（70）在电源关闭状态期间向电动机控制电路（50）供电。

    METHOD AND APPARATUS FOR CONTROLLING MEDIA LINEAR SPEED IN A HELICAL SCAN RECORDER
    23.
    发明申请
    METHOD AND APPARATUS FOR CONTROLLING MEDIA LINEAR SPEED IN A HELICAL SCAN RECORDER 审中-公开
    用于控制在线扫描记录仪中的媒体线性速度的方法和装置

    公开(公告)号：WO1995013615A1

    公开(公告)日：1995-05-18

    申请号：PCT/US1994012933

    申请日：1994-11-10

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  GEORGIS, Steven, P. ,  ZWEIGHAFT, James

    IPC: G11B21/04

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

    Abstract: In a helical scan system (20) 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 (22) during a write operation. Helical scan system (20) includes a rotating drum (30) upon which write heads (W1, W2) and read heads (R1, R2) circumferentially are mounted. The read heads (R1, R2) are positioned on the drum (30) opposite and offset from the write heads (W1, W2) such that as the tape (22) is moved, the read heads (R1, R2) read data that was written by the write heads at least 1.5 rotations of the drum previously. A servo zone read controller (100) digitizes the amplitude of the servo signals read by the read head (R1). Control microprocessor (66) calculates a speed correction value based on that information for application to one or both of the reel motors (50, 52).

    Abstract translation: 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（20）中，使用写在轨道上的伺服信息来控制在写操作期间介质（22）的线速度。 螺旋扫描系统（20）包括旋转鼓（30），周边安装有写入头（W1，W2）和读取头（R1，R2）。 读头（R1，R2）位于与写入头（W1，W2）相对并偏移的鼓（30）上，使得当磁带（22）移动时，读取头（R1，R2）读取数据， 是由写头写的至少1.5圈以前的鼓。 伺服区读取控制器（100）数字化由读取头（R1）读取的伺服信号的幅度。 控制微处理器（66）基于用于应用于一个或两个卷轴电动机（50,52）的信息来计算速度校正值。

    METHOD AND APPARATUS FOR DETERMINING AND USING HEAD PARAMETERS IN A HELICAL SCAN RECORDER
    24.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING AND USING HEAD PARAMETERS IN A HELICAL SCAN RECORDER 审中-公开
    用于确定和使用螺旋扫描记录仪中的头参数的方法和装置

    公开(公告)号：WO1995013606A1

    公开(公告)日：1995-05-18

    申请号：PCT/US1994012932

    申请日：1994-11-10

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  HUGUES, Timothy, C. ,  ABOU-JAOUDE, Fadi, Y.

    IPC: G11B05/00

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

    Abstract: Methods of calibrating a helical scan recorder (20, 20') include transporting a storage media (22, 22') past a drum (30, 30') at a controlled linear velocity and recording tracks on the media using a write head (W2, W2'). During a read-after-write operation, servo signals recorded on the traks are read. The servo signals from the tracks are used to determine an axial offset variance (AOV) of the write head (W2, W2') and a read head (R2, R2') on the drum. In one mode, calibration is achieved for a helical scan recorder (20') having a capstan (142') and wherein the tracks are read back within 180 degrees of recordation. In another mode, calibration is achieved for a helical scan recorder which does not have a capstan, and wherein the tracks are read back at least 540 degrees after recordation. The axial offset variance is used in a write splice operation and, in one mode, to determine linear velocity of the media.

    Abstract translation: 校准螺旋扫描记录器（20,20'）的方法包括以受控的线速度传送存储介质（22,22'）经过滚筒（30,30'），并使用写入头（W2 ，W2'）。 在读写操作期间，读取记录在轨道上的伺服信号。 来自轨道的伺服信号用于确定磁头上的写头（W2，W2'）和读头（R2，R2'）的轴向偏移方差（AOV）。 在一种模式中，对于具有绞盘（142'）的螺旋扫描记录器（20'）实现了校准，并且其中轨迹在180度记录中被读回。 在另一种模式中，对于不具有绞盘的螺旋扫描记录器实现了校准，并且其中轨迹在记录之后至少回读540度。 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。

    CARTRIDGE TRANSPORT ASSEMBLY AND METHOD OF OPERATION THEREOF
    25.
    发明申请
    CARTRIDGE TRANSPORT ASSEMBLY AND METHOD OF OPERATION THEREOF 审中-公开
    卡特彼勒运输组件及其运行方法

    公开(公告)号：WO1990005362A1

    公开(公告)日：1990-05-17

    申请号：PCT/US1989004884

    申请日：1989-11-07

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  HERGER, Zoltan, L. ,  NEJEZCHLEB, Vladimir ,  SILLS, Richard, E.

    IPC: G11B15/68

    CPC classification number: G11B15/6835

    Abstract: An automated magnetic tape cartridge library system includes a cabinet (24) having a door (26) removable and pivotally connected thereto. The cabinet (24) houses a plurality of tape drives (56A-56E) a plurality of racks (70) wherein magnetic tape cartridges are stored. A cartridge transport assembly (100) serves to retrieve a cartridge from a rack (70) and to load the cartridge into a target tape drive (56), and vice versa. Movement of the cartridge transport assembly (100) along X, Y, and Z rectangular coordinate axes is effected by X, Y, and Z displacement systems (104, 106, 108). The cartridge transport assembly (100) and the X, Y, and Z displacement systems (104, 106, 108) are all mounted on the removable, pivotal door (26). The cartridge transport assembly (100) includes a pair of engagement fingers (402A, 402B) which engage a selected cartridge upon contact with the cartridge. In an engagement mode, engagement fingers (402A, 402B) are configured and oriented to engage notches provided on opposite edges of standard 8 mm magnetic tape cartridge such that, upon engagement, the cartridge is locked between the fingers (402A, 402B) without the need of further locking mechanisms. Portions of the linkage means of the cartridge transport assembly (100) dually function as ram elements (452A, 452B) for closing a tape drive door (60) once a cartridge is loaded into a target tape drive (56).

    Abstract translation: 一种自动磁带盒库系统包括具有可拆卸并可枢转地连接到其上的门（26）的机柜（24）。 机柜（24）容纳多个磁带驱动器（56A-56E），其中存储有磁带盒的多个机架（70）。 盒输送组件（100）用于从架（70）取回盒并将盒装载到目标带驱动器（56）中，反之亦然。 盒X输送组件（100）沿X，Y和Z的直角坐标轴的移动由X，Y和Z位移系统（104,106,108）实现。 盒传送组件（100）和X，Y和Z移动系统（104,106,108）都安装在可拆卸的枢转门（26）上。 盒输送组件（100）包括一对接合指状物（402A，402B），其在与盒体接触时接合所选择的盒。 在接合模式中，接合指状物（402A，402B）被构造和定向成接合设置在标准8mm磁带盒的相对边缘上的凹口，使得在接合时，盒被锁定在指状物（402A，402B）之间，而没有 需要进一步的锁定机制。 一旦盒被装载到目标磁带驱动器（56）中，盒运输组件（100）的连接装置的部分双重地用作用于关闭磁带驱动器门（60）的冲击元件（452A，452B）。

    METHOD AND APPARATUS FOR ERROR CORRECTION
    26.
    发明申请
    METHOD AND APPARATUS FOR ERROR CORRECTION 审中-公开
    用于错误校正的方法和装置

    公开(公告)号：WO1988010032A1

    公开(公告)日：1988-12-15

    申请号：PCT/US1988001696

    申请日：1988-05-27

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  ZOOK, Christopher, P.

    IPC: H03M13/00

    CPC classification number: H03M13/15 ,  H03M13/033

    Abstract: For decoding a Reed-Solomon codeword with (n-K) check characters an error/erasure locator (32) executes a codeword cycle comprising (n-K) ''coefficient'' iterations followed by (n-K) ''modified syndrome'' iterations. The error/erasure locator (32) includes a bank (52) of simultaneously loadable syndrome registers and a bank (56) of coefficient registers. The syndrome registers are connected to one another in a circular shift path (91). The error/erasure locator (32) further includes a cascading arrangement of PISO multipliers (54), a SIPO multiplier (60), and PISO multipliers (61). The PISO multipliers (54) operate upon the contents of the syndrome registers (52) (expressed in a conventional basis representation) and the contents of the coefficient register (56) (expressed in dual basis representation) to obtain a serial current discrepancy dn. The SIPO multiplier (60) multiplies the serial current discrepancy dn by a parallel-formatted multiplicative inverse dm-1betai of a prior discrepancy (expressed in dual basis representation) to obtain in one set of clock cycles, the product dndm-1. During a second set of clock cycles the discrepancy product dndm-1 is further multiplied using a second bank (61) of PISO multipliers by the contents of corresponding auxiliary registers (62) to obtain a serial product useful for updating the coefficient registers (56). The syndrome registers (52) perform the dual purpose of storing the original syndromes during the coefficient iteration and of storing the modified syndromes produced during the modified syndrome iteration.

    TRACKING SYSTEM AND METHOD FOR HELICAL SCAN RECORDING DEVICES
    27.
    发明申请
    TRACKING SYSTEM AND METHOD FOR HELICAL SCAN RECORDING DEVICES 审中-公开
    跟踪记录装置的跟踪系统和方法

    公开(公告)号：WO1988009029A1

    公开(公告)日：1988-11-17

    申请号：PCT/US1988001440

    申请日：1988-05-09

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  GEORGIS, Steven, P. ,  BEAVERS, Kelly, J. ,  HAUGHLAND, Steve, E.

    IPC: G11B05/588

    CPC classification number: G11B15/4675

    Abstract: A tracking system and method are disclosed for a helical-scan recording device to automatically maintain the recording/playback heads (16A, 16C) in alignment with the stripes of recorded information (18A-18D) on the magnetic tape (12). Each stripe on the magnetic tape includes a servo signal area having four distinct zones (Z1-Z4). An analog servo signal at a preselected frequency is recorded on one of the four zones on each stripe and is recorded at different ones of the four zones in succession on each group of four adjacent stripes. The servo signal recorded on the stripes is detected during playback and processed to maintain the desired head positioning relative to the stripes on the tape. The servo head (16B) is preferably maintained between adjacent stripes on the magnetic tape and signals detected from each of the adjacent stripes maintain head alignment by shifting the positioning of the head in either direction as needed.

    MAGNETIC TAPE DRIVE WITH END-OF-TRACK BLOCK DIRECTORY
    30.
    发明申请
    MAGNETIC TAPE DRIVE WITH END-OF-TRACK BLOCK DIRECTORY 审中-公开
    磁带驱动器，带有尾部块导向

    公开(公告)号：WO1995019622A1

    公开(公告)日：1995-07-20

    申请号：PCT/US1995000387

    申请日：1995-01-12

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  KLOMP, Charles, B. ,  AYRES, Mark, R. ,  CANTERBURY, Daniel, J.

    IPC: G11B15/18

    CPC classification number: G11B27/328 ,  G11B15/005 ,  G11B15/026 ,  G11B15/087 ,  G11B15/602 ,  G11B27/107 ,  G11B27/11 ,  G11B27/3027 ,  G11B2220/65 ,  G11B2220/90 ,  G11B2220/95

    Abstract: A magnetic tape drive system (20) records a directory block (CL) at a predetermined position on tape (22). The directory includes a data block number of the data block recorded at an end of each track. Upon receipt of a command to locate a target data block recorded on tape (22), a processor (102) directs a transport controller (82) to position a read element (30R) at the predetermined position on tape (22) for reading the directory. The processor (102) compares the target block numers with the data block numbers stored and in response thereto causes a positioner (74) to position the read element with respect to the tape (22) width so as to read the track upon which the data block having the target data block number is recorded.

    Abstract translation: 磁带驱动系统（20）将目录块（CL）记录在磁带（22）上的预定位置。 目录包括记录在每个轨道的末端的数据块的数据块号。 在接收到用于定位记录在磁带（22）上的目标数据块的命令时，处理器（102）引导传送控制器（82）将读取元件（30R）定位在磁带（22）上的预定位置，以读取 目录。 处理器（102）将目标块编号与存储的数据块号进行比较，并且响应于此，定位器（74）相对于带（22）的宽度定位读取元件，以便读取其上的数据 记录具有目标数据块号的块。

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