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1. 发明授权

US5394280A Detecting a servo error on a magnetic tape and identifying extent and location of the detected servo error by linked control marks 失效
标题翻译：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
申请人： Alex Chliwnyj , David C. Graves , Scott M. Fry , Pamela R. Nylander-Hill , Habib M. Torab , Will A. Wright
发明人： Alex Chliwnyj , David C. Graves , Scott M. Fry , Pamela R. Nylander-Hill , Habib M. Torab , Will A. Wright
IPC分类号： G11B20/12 , G11B5/008 , G11B5/584 , G11B15/04 , G11B15/087 , G11B20/18 , G11B21/08 , G11B5/09 , G11B5/596
CPC分类号： G11B21/088 , G11B15/04 , G11B15/087 , G11B5/00817 , G11B5/584
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。

2. 发明授权

US5539914A Method and system for preprocessing data block headers during access of data in a data storage system 失效
标题翻译：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
申请人： Scott M. Fry , Habib M. Torab
发明人： Scott M. Fry , Habib M. Torab
IPC分类号： G06F3/06 , G11B15/087 , G11B20/10 , G06F13/00 , G06F13/20
CPC分类号： G06F3/0601 , G11B15/087 , G11B20/10 , G06F2003/0698
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。

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