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    APPARATUS AND METHOD FOR DISTORTED TRACK DATA RECOVERY
    3.
    发明申请
    APPARATUS AND METHOD FOR DISTORTED TRACK DATA RECOVERY 审中-公开
    用于失真跟踪数据恢复的装置和方法

    公开(公告)号：WO1994029855A1

    公开(公告)日：1994-12-22

    申请号：PCT/US1994005737

    申请日：1994-05-23

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  KAUFFMAN, Gerald, C. ,  HUGHES, Timothy, C. ,  HEINS, Don ,  SLOVACEK, Patricia ,  ABOU-JAOUDE, Fadi

    IPC: G11B05/09

    CPC classification number: G11B27/3027 ,  G11B15/026 ,  G11B15/087 ,  G11B15/1875 ,  G11B15/4673 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/005 ,  G11B27/107 ,  G11B2020/183 ,  G11B2220/90

    Abstract: A helical drive system (10) reads tracks (18) on a storage medium (12), including tracks which appear as distorted tracks. Each track (18) comprises a plurality of blocks of data, with each block having unique block-identifying information. A read head (16C) traverses predetermined original azimuthal paths (P0) across the storage medium (12) for reading the blocks recorded along each of the original azimuthal paths (P0). A controller (50) uses the block-identifying information to determine whether any blocks expected to be read during the traversal of the original azimuthal paths (P0) were not read. If expected blocks were not read, the controller (50) rewinds or otherwise reverses the direction of travel of the storage medium (12); sends a signal to a tape transport drive (81) to slow the speed of the medium (12); and, directs that the medium (12) be re-read at a slower tape re-read speed. During the slow re-read attempt, the read head (16C) traverses modified azimuthal paths (P1, P2, P3,... P10) which are separated from one another by a distance less than the track pitch, thereby providing opportunities to read blocks which would not otherwise be read due to distortion of the tracks (18).

    Abstract translation: 螺旋驱动系统（10）读取存储介质（12）上的轨道（18），包括显示为失真轨道的轨道。 每个轨道（18）包括多个数据块，每个块具有唯一的块识别信息。 读头（16C）穿过存储介质（12）的预定的原始方位路径（P0），用于读取沿着每个原始方位路径（P0）记录的块。 控制器（50）使用块识别信息来确定是否未读取在原始方位路径（P0）遍历期间期望被读取的块。 如果预期的块未被读取，则控制器（50）倒回或以其它方式颠倒存储介质（12）的行进方向; 向磁带传送驱动器（81）发送信号以减慢介质（12）的速度; 并且指示以更慢的磁带重新读取速度重新读取介质（12）。 在缓慢的重新读取尝试期间，读取头（16C）穿过彼此分开距离小于轨道间距的修改的方位角路径（P1，P2，P3，... P10），从而提供阅读的机会 由于轨道（18）的失真而不会读取的块。

    METHOD AND APPARATUS FOR DATA BUFFER MANAGEMENT
    4.
    发明申请
    METHOD AND APPARATUS FOR DATA BUFFER MANAGEMENT 审中-公开
    数据缓存管理的方法和设备

    公开(公告)号：WO1989000312A1

    公开(公告)日：1989-01-12

    申请号：PCT/US1988001697

    申请日：1988-05-27

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  BEAVERS, Kelly, J. ,  PISCIOTTA, E., Christopher

    IPC: G06F03/00

    CPC classification number: G06F3/0601 ,  G06F11/1435 ,  G06F11/16 ,  G06F2003/0691

    Abstract: A data buffer management system (10) supervises the transmission of blocks of data between a first device (21), a data buffer (24), and a second device (26). In a write mode, blocks are transmitted to the second device (26) in an originally-intended sequence. If the second device (26) determines that a bad block was written thereto, the management system (10) rewrites the block in an alternate sequence. In a read mode, the management system (10) ignores bad blocks and duplicate blocks acquired from the second device (26) to transmit blocks of data to the first device (21) in the proper sequence.

    Abstract translation: 数据缓冲器管理系统（10）监督在第一设备（21），数据缓冲器（24）和第二设备（26）之间传输数据块。 在写入模式中，以原始预期的顺序将块发送到第二设备（26）。 如果第二设备（26）确定写入了坏块，则管理系统（10）以替代顺序重写块。 在读取模式中，管理系统（10）忽略从第二设备（26）获得的坏块和重复块，以适当的顺序向第一设备（21）发送数据块。

    METHOD AND APPARATUS FOR VIRTUAL EDGE DETECTION OF MAGNETIC TAPE
    5.
    发明申请
    METHOD AND APPARATUS FOR VIRTUAL EDGE DETECTION OF MAGNETIC TAPE 审中-公开
    用于虚拟边缘检测磁带的方法和装置

    公开(公告)号：WO1996007180A1

    公开(公告)日：1996-03-07

    申请号：PCT/US1995008058

    申请日：1995-06-23

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  AYRES, Mark, R.

    IPC: G11B21/02

    CPC classification number: G11B5/5508 ,  G11B15/026 ,  G11B15/087 ,  G11B15/602

    Abstract: A virtual edge of magnetic tape (22) is located by successively moving a head unit (28) toward a physical edge (22EB) of tape and, at each of a plurality of transverse locations, recording a pattern P of digital information. By either successive read-back or rewind followed by reading, sensing of a read-back or acquisition signal is attempted at each location. In connection with the reading operation, a pattern is acquired from the acquisition signal using a method of amplitude invariant data recovery such as peak detection, the pattern acquired being invariant regardless of any overall amplitude envelope variations. A virtual edge of tape is determined when an acquired pattern derived from the acquisition signal does not match a predetermined pattern of information which was recorded as a corresponding pattern of flux directional transitions.

    Abstract translation: 通过将头单元（28）朝向带的物理边缘（22EB）连续移动并且在多个横向位置中的每一个处记录数字信息的图案P来定位磁带（22）的虚拟边缘。 通过连续回读或倒带，随后读取，在每个位置尝试检测回读或采集信号。 结合读取操作，使用诸如峰值检测的幅度不变数据恢复方法从采集信号获取模式，所获取的模式不考虑任何总体幅度包络变化。 当从获取信号导出的获取的图案与记录为通量方向转换的相应图案的预定信息模式不匹配时，确定磁带的虚拟边缘。

    HEAD POSITIONING IN A MULTI-TRACK MAGNETIC TAPE RECORDER/PLAYER
    6.
    发明申请
    HEAD POSITIONING IN A MULTI-TRACK MAGNETIC TAPE RECORDER/PLAYER 审中-公开
    多轨磁带录音机/播放机头部定位

    公开(公告)号：WO1996001469A1

    公开(公告)日：1996-01-18

    申请号：PCT/US1995008124

    申请日：1995-06-28

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  AYRES, Mark, R. ,  DAKROUB, Housan

    IPC: G11B05/54

    CPC classification number: G11B5/5508 ,  G11B5/5504

    Abstract: A method of positioning the read/write head onto a desired data track (344) in a multi-track record/player utilizes a plurality of registration stripes (381, 382, 383) to find the central axis of a data track. In one embodiment, each registration stripe has associated with it a recorded identification pattern or tone which may be sensed and used for identification purposes. Then, based upon the read amplitude output of the read head (103), the appropriate edge of a registration stripe (382) is detected and, from there, the read/write head (103) is moved directly onto the desired data track without any subsequent open loop movement. In an alternative embodiment, multiple edges are sensed and used in a calculation to determine the lateral displacement associated with the longitudinal centerline of a desired data track.

    Abstract translation: 将读/写头定位到多轨记录/播放器中的期望数据轨道（344）上的方法利用多个配准条（381,382,383）来找到数据轨道的中心轴。 在一个实施例中，每个注册条带与其相关联的记录的识别模式或音调可被感测并用于识别目的。 然后，基于读取头（103）的读取幅度输出，检测注册条带（382）的适当边缘，并且从那里读/写头（103）直接移动到期望的数据轨道上，而没有 任何随后的开环运动。 在替代实施例中，在计算中感测并使用多个边缘以确定与期望数据轨道的纵向中心线相关联的横向位移。

    HELICAL SCAN METHOD AND APPARATUS FOR READING NON-NATIVE FORMATS
    7.
    发明申请
    HELICAL SCAN METHOD AND APPARATUS FOR READING NON-NATIVE FORMATS 审中-公开
    用于阅读非本体格式的螺旋扫描方法和装置

    公开(公告)号：WO1995013613A1

    公开(公告)日：1995-05-18

    申请号：PCT/US1994012934

    申请日：1994-11-10

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  HUGUES, Timothy, C.

    IPC: G11B15/46

    CPC classification number: G11B15/4673 ,  G11B15/026 ,  G11B15/087 ,  G11B15/1875 ,  G11B20/10 ,  G11B20/12

    Abstract: A helical scan system determines whether media-to-be read is non-native formatted media and controls operating parameters (e.g., tape speed) (214) so that non-native formatted media can be read without resort to embedded servo information in the non-native media. The helical scan system reals the media (200) in a manner to obtain format-indicative information therefrom, and then determines whether the media is non-native formatted (206). If the media is non-native formatted, a controller determines operating parameters required by the system to read the non-native formatted media (212) and generates signals corresponding to the required operating parameters. The media is preferably read in a slow speed mode (204) in order to obtain format-indicative information therefrom, and block header information obtained from the media is analyzed (206) to determine whether the media is non-native formatted.

    Abstract translation: 螺旋扫描系统确定要被读取的媒体是否是非本地格式的媒体，并且控制操作参数（例如，磁带速度）（214），使得非本地格式化的媒体可以被读取而不需要在非非本地格式化媒体中嵌入的伺服信息 - 媒体。 螺旋扫描系统以从其中获得格式指示信息的方式发送媒体（200），然后确定媒体是否是非本地格式化的（206）。 如果媒体是非本地格式化的，则控制器确定系统所需的操作参数以读取非本地格式化媒体（212）并产生对应于所需操作参数的信号。 优选地以低速模式（204）读取媒体，以便从中获得格式指示信息，并且分析从媒体获取的块头信息（206）以确定媒体是否是非本地格式化的。

    HIGH PERFORMANCE POWER AMPLIFIER
    8.
    发明申请
    HIGH PERFORMANCE POWER AMPLIFIER 审中-公开
    高性能功率放大器

    公开(公告)号：WO1995013571A1

    公开(公告)日：1995-05-18

    申请号：PCT/US1994012935

    申请日：1994-11-10

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  ZWEIGHAFT, James ,  BAUMANN, Dallas

    IPC: G05B11/18

    CPC classification number: H03F3/3061 ,  G05B11/28 ,  G11B15/32 ,  H03F3/72 ,  Y10S388/91

    Abstract: A power amplifier (18) for driving a brushless DC motor (22) includes a processor (40) which receives a signal indicative of motor situational usage and generates a mode state signal indicative of which one of a plurality of amplification modes is to be implemented in response to the received signal. The amplification modes include a linear mode and a switching mode, with the switching mode including a two quadrant switching mode and a four quadrant switching mode. The amplifier (18) further includes a controller (50) which, in response to the mode state signal, generates control signals for each of coil drive circuits (26) associated with the motor. Further, in response to a signal indicative of motor situational usage, processor (40) generates a power state signal which causes controller (50) to connect coil drive circuits (26) to a suitable one of plurality of differing voltage sources (21, 23). The power amplifier (18) has particular employment for a reel motor (22S, 22T) for a helical scan recorder (100) which records information on magnetic tape (102).

    Abstract translation: 用于驱动无刷直流电动机（22）的功率放大器（18）包括处理器（40），其接收指示电机情况使用的信号，并产生指示要实现多个放大模式中的哪一个的模式状态信号 响应于所接收的信号。 放大模式包括线性模式和开关模式，开关模式包括两象限切换模式和四象限切换模式。 放大器（18）还包括控制器（50），其响应于模式状态信号为与电动机相关联的每个线圈驱动电路（26）产生控制信号。 此外，响应于指示电机情况使用的信号，处理器（40）产生电源状态信号，其使得控制器（50）将线圈驱动电路（26）连接到多个不同电压源（21,23）中适当的一个 ）。 功率放大器（18）对于在磁带（102）上记录信息的螺旋扫描记录器（100）的卷轴电动机（22S，22T）具有特别的用途。

    CARTRIDGE LOADING APPARATUS AND METHOD
    9.
    发明申请
    CARTRIDGE LOADING APPARATUS AND METHOD 审中-公开
    卡车装载和方法

    公开(公告)号：WO1991007750A1

    公开(公告)日：1991-05-30

    申请号：PCT/US1990006348

    申请日：1990-11-07

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  MARLOWE, Christian, Paul

    IPC: G11B17/04

    CPC classification number: G11B17/032 ,  G11B17/0407

    Abstract: An apparatus (20) and method is provided for front loading of cartridge (100) of magnetic information storage medium into a read/write relationship with a read/write unit (32). The apparatus includes a cartridge-supporting tray (24) which is accommodated in a frame (22). A door (26) is pivotally connected to the frame (22) for enclosing the cartridge in a cavity (30) defined by the frame (22). The frame (22) has a pair of guide slots (62, 63) provided on opposing frame sidewalls. Orientation pins (60, 61) provided on the tray (24) extend through the guide slots (62, 63). The guide slots (62, 63) define a path of travel for the tray (24) and the cartridge that includes counterclokwise motion about a first pivot point (64) followed by clockwise motion about a second pivot point (66). The drive door (26) has a linkage (70) which engages the tray orientation pins (60), whereby closing and opening the drive door (26) causes the dual pivoting action of the cartridge and tray into a fully loaded position.

    SERVO TRACKING FOR HELICAL SCAN RECORDER
    10.
    发明申请
    SERVO TRACKING FOR HELICAL SCAN RECORDER 审中-公开
    伺服跟踪记录仪

    公开(公告)号：WO1991007746A1

    公开(公告)日：1991-05-30

    申请号：PCT/US1990006324

    申请日：1990-11-06

    Applicant: EXABYTE CORPORATION

    Inventor： EXABYTE CORPORATION ,  HUGHES, Timothy, C. ,  GEORGIS, Steven, Philip ,  ZWEIGHAFT, James

    IPC: G11B05/584

    CPC classification number: G11B5/588

    Abstract: 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 amplitudes 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.

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