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    DETECTING MEDIA DEFECTS
    1.
    发明申请
    DETECTING MEDIA DEFECTS 审中-公开

    公开(公告)号：US20180102141A1

    公开(公告)日：2018-04-12

    申请号：US15629629

    申请日：2017-06-21

    申请人： International Business Machines Corporation

    发明人： Robert G. Biskeborn

    IPC分类号： G11B20/18 ,  G11B5/008

    CPC分类号： G11B20/1816 ,  G11B5/00813 ,  G11B5/00817 ,  G11B5/313 ,  G11B20/1886 ,  G11B2020/1823 ,  G11B2020/1826

    摘要： A computer program product, according to one embodiment, includes a computer readable storage medium having program instructions embodied therewith. The computer readable storage medium is not a transitory signal per se. Moreover, the program instructions readable and/or executable by a processor to cause the processor to perform a method which includes: instructing, by the processor, a drive to detect a written signal burst on a magnetic tape; and searching, by the processor, a surface of the magnetic tape proximate to the written signal burst for a defect. A computer-implemented method, according to another embodiment, includes: moving a magnetic tape to an approximate location of a defect, detecting a written signal burst on the magnetic tape, and stopping movement of the magnetic tape in response to detecting the written signal burst. Other systems, methods, and computer program products are described in additional embodiments.

    Track defect map for a disk drive data storage system
    4.
    发明授权
    Track defect map for a disk drive data storage system 有权
    跟踪磁盘驱动器数据存储系统的缺陷映射

    公开(公告)号：US08854758B2

    公开(公告)日：2014-10-07

    申请号：US11419279

    申请日：2006-05-19

    申请人： Walter Allen ,  Robert Alan Reid

    发明人： Walter Allen ,  Robert Alan Reid

    IPC分类号： G11B5/09 ,  G11B20/18

    CPC分类号： G11B20/1833 ,  G11B2020/1826 ,  G11B2220/2516

    摘要： A method and apparatus for storing a disk drive media defect table or list. Defect table entries for a subject disk track are stored on the subject track and retrieved for determining defective sectors only when the subject track is accessed for a data read or write operation.

    摘要翻译： 一种用于存储磁盘驱动器介质缺陷表或列表的方法和装置。 目标磁盘轨道的缺陷表条目被存储在主题轨道上，并且只有当对象轨道被访问用于数据读取或写入操作时才被检索用于确定缺陷扇区。

    Information recording medium, information recording method, information recording apparatus, information reproducing method and information reproducing apparatus
    7.
    发明授权
    Information recording medium, information recording method, information recording apparatus, information reproducing method and information reproducing apparatus 有权
    信息记录介质，信息记录方法，信息记录装置，信息再现方法和信息再现装置

    公开(公告)号：US08369197B2

    公开(公告)日：2013-02-05

    申请号：US13085565

    申请日：2011-04-13

    申请人： Yoshihisa Takahashi ,  Motoshi Ito

    发明人： Yoshihisa Takahashi ,  Motoshi Ito

    IPC分类号： G11B7/00

    CPC分类号： G11B20/1883 ,  G11B2020/1826 ,  G11B2220/20 ,  G11B2220/2541 ,  G11B2220/2562

    摘要： If a defective cluster in a spare area is managed with a defect entry, the size of a DFL will increase as the size of the spare area increases with an increase in the number of recording layers stacked in a disc. An information recording medium according to the present invention has pointer information indicating the location of the next available cluster in each spare area, and restricts the direction in which the spare area is used. Also, a defect entry indicating a defective cluster in the spare area is registered with the DFL. Thus, even if the size of the spare area 15 increases, the size of the DFL 21 can be kept relatively small. Furthermore, even after physical reformatting is done, a defective cluster, if any, in the spare area 15 can still be recognized as a defect and the control operation can be performed so that a replacement cluster is not re-allocated to that defective cluster (i.e., the defective cluster is not used).

    摘要翻译： 如果利用缺陷条目管理备用区中的有缺陷的簇，则随堆叠在盘中的记录层的数量的增加，随着备用区的大小的增加，DFL的大小将增加。 根据本发明的信息记录介质具有指示每个备用区域中下一可用簇的位置的指针信息，并且限制使用备用区的方向。 另外，用DFL登记表示备用区域中的缺陷簇的缺陷项。 因此，即使备用区域15的尺寸增加，DFL 21的尺寸也可以保持相对较小。 此外，即使在物理重新格式化之后，备用区域15中的缺陷簇（如果有的话）仍然可以被识别为缺陷，并且可以执行控制操作，使得替换簇不被重新分配给该缺陷簇（ 即不使用有缺陷的集群）。

    METHOD AND SYSTEM FOR DYNAMICALLY EXPANDABLE SOFTWARE BASED BAD BLOCK MANAGEMENT
    8.
    发明申请
    METHOD AND SYSTEM FOR DYNAMICALLY EXPANDABLE SOFTWARE BASED BAD BLOCK MANAGEMENT 审中-公开
    基于动态可扩展软件的边框管理方法与系统

    公开(公告)号：US20120262815A1

    公开(公告)日：2012-10-18

    申请号：US13087723

    申请日：2011-04-15

    申请人： Kapil Sundrani

    发明人： Kapil Sundrani

    IPC分类号： G11B5/09

    CPC分类号： G11B20/18 ,  G06F11/1076 ,  G11B2020/1826 ,  G11B2220/415

    摘要： A method and system for tracking a sequence of bad blocks in a RAID system by storing the logical block address of the first bad block and the number of bad blocks in the sequence is disclosed. The method and system may also track multiple sequences of bad blocks by storing a memory pointer to the next sequence in each previous sequence in an expandable linked list configuration.

    摘要翻译： 公开了通过存储第一坏块的逻辑块地址和序列中的坏块的数量来跟踪RAID系统中的坏块序列的方法和系统。 该方法和系统还可以通过将存储器指针存储到可扩展链接列表配置中的每个先前序列中的下一个序列来跟踪多个不良块序列。

    Storage media defect detection
    9.
    发明授权
    Storage media defect detection 有权
    存储介质缺陷检测

    公开(公告)号：US08274871B2

    公开(公告)日：2012-09-25

    申请号：US13291017

    申请日：2011-11-07

    申请人： Haitao Xia ,  Yenyu Hsieh ,  Bac Pham

    发明人： Haitao Xia ,  Yenyu Hsieh ,  Bac Pham

    IPC分类号： G11B20/18

    CPC分类号： G11B20/18 ,  G11B20/10037 ,  G11B20/10222 ,  G11B27/36 ,  G11B2020/1826 ,  G11B2220/2516

    摘要： Detecting a defect on a storage device is disclosed. Detecting includes receiving a signal read from a storage device, sampling the signal to obtain a set of signal samples, wherein the sampling starts at an arbitrary time, computing a defect value for a defect type using the set of signal samples, comparing the defect value with a threshold associated with the defect type, determining whether there is a defect of the defect type based at least in part on the comparison, and in the event that a defect is detected, outputting an indication associated with the defect.

    摘要翻译： 公开了检测存储设备上的缺陷。 检测包括接收从存储设备读取的信号，对信号进行采样以获得一组信号样本，其中采样在任意时间开始，使用该组信号样本计算缺陷类型的缺陷值，比较缺陷值 具有与缺陷类型相关联的阈值，至少部分地基于比较来确定是否存在缺陷类型的缺陷，并且在检测到缺陷的情况下，输出与缺陷相关联的指示。