Monitoring of extent of writing of unobscured data to improve erase performance on a magnetic medium
    3.
    发明授权
    Monitoring of extent of writing of unobscured data to improve erase performance on a magnetic medium 有权
    监控视野数据的写入程度,以提高磁介质上的擦除性能

    公开(公告)号:US08799612B2

    公开(公告)日:2014-08-05

    申请号:US13551512

    申请日:2012-07-17

    摘要: A system according to one embodiment includes a processor; logic in the processor and/or a memory configured to determine a furthest physical position on a magnetic medium that unobscured data has been written to; and logic configured to store an indicator of the furthest physical position on at least one of the magnetic medium and a memory coupled thereto. A system according to another embodiment includes a processor; logic in the processor and/or a memory configured to receive an instruction to obscure data on a magnetic medium; logic configured to read an indicator of a furthest physical position on the magnetic medium that unobscured data has been written to; and logic configured to cause obscuring of the unobscured data on the magnetic medium, and terminating the obscuring upon reaching the physical position in the indicator.

    摘要翻译: 根据一个实施例的系统包括处理器; 处理器中的逻辑和/或被配置为确定已经写入数据的磁性介质上的最远物理位置的存储器; 以及逻辑,其被配置为存储所述磁介质和与其耦合的存储器中的至少一个上的最远物理位置的指示符。 根据另一实施例的系统包括处理器; 处理器中的逻辑和/或被配置为接收用于遮蔽磁介质上的数据的指令的存储器; 被配置为读取已读取数据已被写入的磁介质上最远物理位置的指示符的逻辑; 以及逻辑,其被配置为引起所述磁性介质上的所述不可视数据的模糊,并且在到达所述指示器中的所述物理位置时终止所述模糊。

    MONITORING OF EXTENT OF WRITING OF UNOBSCURED DATA TO IMPROVE ERASE PERFORMANCE ON A MAGNETIC MEDIUM
    4.
    发明申请
    MONITORING OF EXTENT OF WRITING OF UNOBSCURED DATA TO IMPROVE ERASE PERFORMANCE ON A MAGNETIC MEDIUM 有权
    监测未知数据的写入范围,以提高磁性介质的擦除性能

    公开(公告)号:US20140025885A1

    公开(公告)日:2014-01-23

    申请号:US13551512

    申请日:2012-07-17

    IPC分类号: G06F12/00

    摘要: A system according to one embodiment includes a processor; logic in the processor and/or a memory configured to determine a furthest physical position on a magnetic medium that unobscured data has been written to; and logic configured to store an indicator of the furthest physical position on at least one of the magnetic medium and a memory coupled thereto. A system according to another embodiment includes a processor; logic in the processor and/or a memory configured to receive an instruction to obscure data on a magnetic medium; logic configured to read an indicator of a furthest physical position on the magnetic medium that unobscured data has been written to; and logic configured to cause obscuring of the unobscured data on the magnetic medium, and terminating the obscuring upon reaching the physical position in the indicator.

    摘要翻译: 根据一个实施例的系统包括处理器; 处理器中的逻辑和/或被配置为确定已经写入数据的磁性介质上的最远物理位置的存储器; 以及逻辑,其被配置为存储所述磁介质和与其耦合的存储器中的至少一个上的最远物理位置的指示符。 根据另一实施例的系统包括处理器; 处理器中的逻辑和/或被配置为接收用于遮蔽磁介质上的数据的指令的存储器; 被配置为读取已读取数据已被写入的磁介质上最远物理位置的指示符的逻辑; 以及逻辑,其被配置为引起所述磁性介质上的所述不可视数据的模糊,并且在到达所述指示器中的所述物理位置时终止所述模糊。

    Method for reordering access to reduce total seek time on tape media
    5.
    发明授权
    Method for reordering access to reduce total seek time on tape media 有权
    重新排序访问的方法可减少磁带介质上的总搜索时间

    公开(公告)号:US09021175B2

    公开(公告)日:2015-04-28

    申请号:US12862198

    申请日:2010-08-24

    IPC分类号: G06F13/00 G06F13/28 G06F3/06

    摘要: A method, system and computer-usable medium are disclosed for reordering User Data Segment (UDS) lists to reduce seek times when accessing data stored on tape media. A host application sends a list of UDSs to a target tape drive and requests the tape drive to reorder the list to provide better performance. An ordered list of target User data Segments to retrieve from a target tape media is received. Information related to the location of each UDS on the target media is processed to determine its corresponding physical position on the tape media. The resulting physical positions are then processed to generate a reordered UDS list, where the order of the User Data Segments is reordered according to their physical location on the target tape media. The reordered list of User Data Segments is then used to perform seek, reposition and read operations to read User Data Segments from the tape media.

    摘要翻译: 公开了一种用于重新排序用户数据段(UDS)列表的方法,系统和计算机可用介质,以减少访问存储在磁带介质上的数据时的查找时间。 主机应用程序将UDS列表发送到目标磁带机,并请求磁带机重新排列列表以提供更好的性能。 目标用户数据的有序列表接收到从目标磁带介质检索的段。 处理与目标介质上的每个UDS的位置有关的信息,以确定其在磁带介质上的对应的物理位置。 然后处理所产生的物理位置以产生重新排序的UDS列表,其中用户数据段的顺序根据其在目标磁带介质上的物理位置重新排序。 然后,用户数据段的重新排序列表用于执行搜索,重新定位和读取操作,以从磁带介质读取用户数据段。

    Method for Reordering Access to Reduce Total Seek Time on Tape Media
    6.
    发明申请
    Method for Reordering Access to Reduce Total Seek Time on Tape Media 有权
    重新排序访问方法可减少磁带介质上的总寻求时间

    公开(公告)号:US20120054428A1

    公开(公告)日:2012-03-01

    申请号:US12862198

    申请日:2010-08-24

    IPC分类号: G06F12/00

    摘要: A method, system and computer-usable medium are disclosed for reordering User Data Segment (UDS) lists to reduce seek times when accessing data stored on tape media. A host application sends a list of UDSs to a target tape drive and requests the tape drive to reorder the list to provide better performance. An ordered list of target User data Segments to retrieve from a target tape media is received. Information related to the location of each UDS on the target media is processed to determine its corresponding physical position on the tape media. The resulting physical positions are then processed to generate a reordered UDS list, where the order of the User Data Segments is reordered according to their physical location on the target tape media. The reordered list of User Data Segments is then used to perform seek, reposition and read operations to read User Data Segments from the tape media.

    摘要翻译: 公开了一种用于重新排序用户数据段(UDS)列表的方法,系统和计算机可用介质,以减少访问存储在磁带介质上的数据时的查找时间。 主机应用程序将UDS列表发送到目标磁带机,并请求磁带机重新排列列表以提供更好的性能。 目标用户数据的有序列表接收到从目标磁带介质检索的段。 处理与目标介质上的每个UDS的位置有关的信息,以确定其在磁带介质上的对应的物理位置。 然后处理所产生的物理位置以产生重新排序的UDS列表,其中用户数据段的顺序根据其在目标磁带介质上的物理位置重新排序。 然后,用户数据段的重新排序列表用于执行搜索,重新定位和读取操作,以从磁带介质读取用户数据段。

    Detecting a servo error on a magnetic tape and identifying extent and
location of the detected servo error by linked control marks
    7.
    发明授权
    Detecting a servo error on a magnetic tape and identifying extent and location of the detected servo error by linked control marks 失效
    检测磁带上的伺服误差,并通过链接的控制标识识别检测到的伺服误差的程度和位置

    公开(公告)号:US5394280A

    公开(公告)日:1995-02-28

    申请号:US75622

    申请日:1993-06-14

    摘要: A magnetic tape drive simultaneously senses on a magnetic tape three evenly spaced-apart servo track areas for servoing a multi-track magnetic head to follow a concurrent set of data tracks on the magnetic tape. The data tracks are arranged into a plurality of track groups. Each track group has a first and second subgroup of data tracks. The first subgroup of tracks are scanned in a first relative motion of the magnetic tape and magnetic head as a forward direction (tape is being spooled from a supply tape reel). The second subgroup of tracks are scanned in a second relative motion of the magnetic tape and magnetic head that is opposite in direction to the first relative direction and is a forward direction of scanning. While writing data in any one of the plural track groups, a servo dropout affecting most of the servo track areas is detected and indicated as a servo error. Writing is aborted. The relative position of the magnetic tape and head is detected at both longitudinal ends of the servo dropout. A servo dropout block (SDB), a tape control block, is written at each longitudinal end of the servo dropout only in the group of tracks in which data are being written. The tape space between the two SDBs is termed a limited portion of the tape in which no recording is permitted.

    摘要翻译: 磁带驱动器同时在磁带上感测三个均匀间隔开的伺服磁道区域,用于伺服多轨磁头以跟随磁带上的一组数据轨道。 数据轨道被布置成多个轨道组。 每个轨道组具有第一和第二子数据轨道子组。 轨道的第一子组以磁带和磁头作为向前方向的第一相对运动扫描(磁带从供带卷轴卷绕)。 轨道的第二子组以与第一相对方向相反的磁带和磁头的第二相对运动扫描,并且是扫描的正向。 当在多个磁道组中的任何一个中写入数据时,检测到影响大多数伺服磁道区域的伺服压差,并将其表示为伺服误差。 写作中止。 在伺服脱落的两个纵向端处检测磁带和磁头的相对位置。 只有在正在写入数据的磁道组中,伺服压差块(SDB)(磁带控制块)被写入伺服压差的每个纵向端。 两个SDB之间的磁带空间被称为不允许记录的磁带的有限部分。

    Apparatus and method to erase a magnetic tape
    8.
    发明授权
    Apparatus and method to erase a magnetic tape 失效
    擦除磁带的装置和方法

    公开(公告)号:US06906881B2

    公开(公告)日:2005-06-14

    申请号:US10186309

    申请日:2002-06-27

    摘要: A method to erase a magnetic tape, where the magnetic tape is first mounted in a magnetic tape in a tape drive, where that magnetic tape includes a physical beginning of tape (“PBOT”), a physical end of tape (“PEOT”), and information written thereon between the PBOT and the PEOT. The method then establishes one or more critical areas located on the magnetic tape, attempts to erase the information, and determines if each of the one or more critical areas have been erased. In the event each of said one or more critical areas have not been erased, Applicants' method provides an error message.

    摘要翻译: 一种擦除磁带的方法,其中磁带首先安装在磁带驱动器中的磁带中,其中磁带包括磁带的物理开始(“PBOT”),磁带的物理端(“PEOT”) ,以及在PBOT和PEOT之间写入的信息。 然后,该方法建立位于磁带上的一个或多个关键区域,尝试擦除信息,并确定一个或多个关键区域中的每一个是否已经被擦除。 在所述一个或多个关键区域中的每个尚未被擦除的情况下,申请人的方法提供错误消息。

    Method and system for preprocessing data block headers during access of
data in a data storage system
    9.
    发明授权
    Method and system for preprocessing data block headers during access of data in a data storage system 失效
    在数据存储系统中数据访问期间预处理数据块头的方法和系统

    公开(公告)号:US5539914A

    公开(公告)日:1996-07-23

    申请号:US77164

    申请日:1993-06-14

    摘要: A method and system are disclosed for efficiently reading and processing multiple data blocks stored in a removable data storage medium within a data storage system, wherein each data block includes a header portion containing selected parameters necessary to identify and process an associated data block, and a data portion. Each data block is accessed within the removable data storage medium utilizing track logic circuitry and then coupled to a data block buffer for temporary storage. A header processing logic circuit is interposed between the track logic circuitry and the data block buffer and is utilized to initiate processing of only the header portion of each data block prior to storage of the data block within the data block buffer. After completion of processing of the header portion of a data block and completion of storage of that data block within the data block buffer, the data block is efficiently processed utilizing selected parameters contained within the header portion. In this manner, data blocks may be efficiently transferred, processed or coupled to an error recovery procedure from the data block buffer without the delay associated with processing each header portion of a data block after storage of that data block within the data block buffer.

    摘要翻译: 公开了一种用于有效地读取和处理存储在数据存储系统内的可移动数据存储介质中的多个数据块的方法和系统,其中每个数据块包括包含识别和处理关联的数据块所必需的所选参数的报头部分,以及 数据部分。 利用轨道逻辑电路在可移动数据存储介质内访问每个数据块,然后耦合到数据块缓冲器进行临时存储。 标题处理逻辑电路被插入在轨道逻辑电路和数据块缓冲器之间,并且在数据块在数据块缓冲器中存储之前被用于仅开始处理每个数据块的头部部分。 在完成对数据块的报头部分的处理和数据块缓冲器中的该数据块的存储完成之后,利用包含在报头部分内的所选参数来有效地处理数据块。 以这种方式,数据块可以被有效地传送,处理或耦合到来自数据块缓冲器的错误恢复过程,而没有与在数据块缓冲器中存储该数据块之后处理数据块的每个报头部分相关联的延迟。

    Dynamic buffer reallocation
    10.
    发明授权
    Dynamic buffer reallocation 失效
    动态缓冲区重新分配

    公开(公告)号:US4603382A

    公开(公告)日:1986-07-29

    申请号:US584053

    申请日:1984-02-27

    IPC分类号: G06F12/08 G06F3/00 G06F12/00

    CPC分类号: G06F12/08

    摘要: A peripheral data storage system employing a data buffer connected to a plurality of data storage devices, such as tape recorders, dynamically reallocates data buffer storage segments among the various data storage devices. A normalized elapsed-time period is established based upon the number of accesses to the data storage devices. When the number of accesses reaches a threshold the need for dynamic reallocation is examined. During the elapsed-time period the system monitors which of the allocated buffer segments have any data transfer activity at all and also measures the intensity of the activity for the respective buffer segments. In a peripheral system, the intensity is indicated by the number of channel command retries submitted to a connected host processor for the respective allocated buffer segment. Based upon the allocation status of the buffer segments and intensity of activities of the respective buffer segments, the buffer allocations are selectively reallocated among the data storage devices.

    摘要翻译: 采用数据缓冲器的外围数据存储系统,连接到多个数据存储装置,例如磁带录音机,动态地重新分配各种数据存储装置之间的数据缓冲存储段。 基于对数据存储装置的访问次数建立归一化的经过时间段。 当访问次数达到阈值时,将检查对动态重新分配的需求。 在经过时间段期间,系统监视哪个分配的缓冲区段完全具有任何数据传输活动,并且还测量相应缓冲区段的活动强度。 在外设系统中,强度由对相应分配的缓冲区段提交给连接的主机处理器的通道命令重试次数指示。 基于缓冲区段的分配状态和相应缓冲区段的活动强度,缓冲区分配被选择性地重新分配在数据存储设备中。