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    • 2. 发明申请
    • TAPE DRIVE, TAPE DRIVE RECORDING SYSTEM, AND METHOD FOR SELECTING IMPROVED TAPE SPEED IN RESPONSE TO INTERMITTENT READ REQUESTS
    • 磁带驱动器,磁带驱动器记录系统以及用于选择改进的磁带速度以响应于间接读取请求的方法
    • US20120290784A1
    • 2012-11-15
    • US13560990
    • 2012-07-27
    • Takashi KatagiriHirokazu NakayamaMotoko OeYutaka Oishi
    • Takashi KatagiriHirokazu NakayamaMotoko OeYutaka Oishi
    • G06F12/00
    • G11B15/46G11B15/32
    • A tape drive, tape drive recording system, and method are provided for improving tape speed selection during data transfer. The tape drive includes a buffer, a tape for recording the data to be temporarily stored in the buffer, and a read head. The tape drive further includes a reading controller that initially sets a tape speed such that a drive transfer rate matches a host transfer rate as closely as possible and that drives the tape at the tape speed. To address backhitching caused by one or more host transfer halts, the reading controller subsequently adjusts the tape speed such that the drive transfer rate is lower than the host transfer rate by recalculating the host transfer rate in consideration of the host transfer and the host transfer halt and setting the tape speed such that the drive transfer rate matches the recalculated host transfer rate as closely as possible.
    • 提供磁带驱动器,磁带驱动器记录系统和方法,用于在数据传输期间提高磁带速度选择。 磁带驱动器包括缓冲器,用于记录要临时存储在缓冲器中的数据的磁带和读取头。 磁带驱动器还包括读取控制器,该读取控制器最初设置磁带速度,使得驱动器传送速率尽可能接近主机传送速率,并以磁带速度驱动磁带。 为了解决由一个或多个主机传送暂停引起的后跳,读取控制器随后调整磁带速度,使得考虑到主机传输和主机传输中止重新计算主机传输速率,驱动器传输速率低于主机传输速率 并且设置磁带速度使得驱动器传送速率尽可能接近于重新计算的主机传输速率。
    • 5. 发明授权
    • Avoiding a part of tape where error occurs by computing a number of records and a number of boundary marks included in an error data unit
    • 通过计算包含在错误数据单元中的多个记录和多个边界标记来避免出现错误发生的一部分磁带
    • US08037346B2
    • 2011-10-11
    • US12189593
    • 2008-08-11
    • Takashi KatagiriEiji TosakaKatsumi Yoshimura
    • Takashi KatagiriEiji TosakaKatsumi Yoshimura
    • G06F11/00
    • G11B20/1201G06F3/0617G06F3/0659G06F3/0682G11B20/1883G11B27/3027G11B27/34G11B27/36G11B2220/90
    • A system for processing a data read error from a tape medium in one embodiment includes a reading section for reading data in data units from a tape medium; a reading control section for controlling said reading section to read data, and on condition that if an error occurs in reading one of said data units, the data unit where the error occurs is considered an error data unit and the reading control section issues an instruction to skip the error data unit and read the next readable data unit immediately after the error data unit; a computation section for computing a number of records and a number of boundary marks included in the error data unit where said error occurs from information about the records and boundary marks included in the data unit preceding the error data unit that is read immediately before said error occurs, and information about the records and boundary marks included in the data unit next to said error data unit, the boundary marks indicating the boundary of a record block; and a communication section for outputting the number information about said computed number of records and said computed number of boundary marks.
    • 在一个实施例中,用于处理来自磁带介质的数据读取错误的系统包括用于从磁带介质读取数据单元的数据的读取部分; 用于控制所述读取部分读取数据的读取控制部分,并且在如果在读取所述数据单元之一中发生错误的情况下,发生错误的数据单元被认为是错误数据单元,并且读取控制部分发出指令 跳过错误数据单元并在错误数据单元之后立即读取下一个可读数据单元; 计算部分,用于计算包括在错误数据单元中的记录数量和边界标记的数量,所述错误数据单元中的所述错误发生自关于在所述错误之前立即读取的错误数据单元之前的数据单元中的记录和边界标记的信息 以及关于包含在所述错误数据单元旁边的数据单元中的记录和边界标记的信息,指示记录块的边界的边界标记; 以及通信部分,用于输出关于所述计算的记录数量和所计算的边界标记数量的数量信息。
    • 10. 发明申请
    • APPARATUS AND METHOD FOR WRITING AND READING DATA TO AND FROM TAPE MEDIUM
    • 用于从带状介质写入和读取数据的装置和方法
    • US20090180212A1
    • 2009-07-16
    • US12348776
    • 2009-01-05
    • Takashi KatagiriToshiyuki Shiratori
    • Takashi KatagiriToshiyuki Shiratori
    • G11B19/02G11B5/78
    • G11B5/584G11B5/00817G11B20/00833G11B2020/1099G11B2220/90
    • The present invention enhances the capability to specify a recorded position of designated data, even when a tape medium is run at high speed. A controller of a tape drive includes: a data set generator for generating a data set; a metadata generator for generating metadata including the number of records in the data set and the like; and a writing unit for writing the data set to the tape medium with a high recording density, and writing the metadata to the tape medium with a low recording density. The controller also includes: a movement controller for receiving a record number of a designated record; a reading unit for obtaining the number of records and the like included in the metadata read by running the tape medium at high speed; and a comparison unit for determining whether or not to read the data set by lowering the speed of the tape medium to R/W speed, in comparison with the record number received by the movement controller and the number of records and the like obtained by the reading unit.
    • 即使当磁带介质高速运行时,本发明增强了指定数据的记录位置的能力。 磁带驱动器的控制器包括:数据组发生器,用于产生数据集; 用于生成包括数据集中的记录数等的元数据的元数据生成器; 以及用于将数据集写入具有高记录密度的磁带介质的写入单元,并将元数据写入具有低记录密度的磁带介质。 所述控制器还包括:移动控制器,用于接收指定记录的记录号; 读取单元,用于通过高速运行磁带介质来获得包含在元数据中的记录数等; 以及比较单元,用于通过将所述带介质的速度降低到R / W速度来确定是否读取所述数据集,与由所述移动控制器接收的记录号和由所述移动控制器获得的记录数相比较 阅读单位