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1. 发明申请

WO2014012177A1 VARIABLE STOPWRITE THRESHOLD WITH VARIABLE SMOOTHING FACTOR 审中-公开
标题翻译：具有可变平滑因子的可变停止门限
公开(公告)号：WO2014012177A1
公开(公告)日：2014-01-23
申请号：PCT/CA2013/050484
申请日：2013-06-21
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM CANADA LIMITED-IBM CANADA LIMITEE
发明人： BUI, Nhan X. , JUDD, Kevin B. , TAKETOMI, Tomoko
IPC分类号： G11B5/02 , G11B5/008
CPC分类号： G11B5/00817 , G11B5/0083 , G11B5/09 , G11B5/584 , G11B20/10388 , G11B27/36
摘要： In one embodiment, a data storage system includes a head; a drive mechanism for passing a medium over the head; a controller electrically coupled to the head; logic encoded in or available to the controller for: periodically determining a stopwrite threshold based on a standard deviation or a variance at a current position error signal sample, wherein a smoothing factor applied to a subsequent calculation of the standard deviation or variance is altered based at least in part on a current magnitude of the standard deviation or the variance; determining whether the current position error signal sample exceeds the stopwrite threshold; disabling writing when the current position error signal sample exceeds the stopwrite threshold; and l enabling writing when the current position error signal sample does not exceed the stopwrite threshold. Other systems, methods, and computer program products are described according to more embodiments.
摘要翻译：在一个实施例中，数据存储系统包括头部; 用于使介质通过头部的驱动机构; 控制器电耦合到头部; 编码在或可用于控制器的逻辑，用于：基于当前位置误差信号样本的标准偏差或方差周期性地确定停止写入阈值，其中应用于随后的标准偏差或方差的计算的平滑因子基于至少部分地基于当前的标准偏差或方差的大小; 确定当前位置误差信号样本是否超过限制写入阈值; 当当前位置错误信号样本超过限制写入阈值时禁止写入; 以及当当前位置误差信号样本不超过限制写入阈值时，使能写入。根据更多实施例描述其它系统，方法和计算机程序产品。

2. 发明申请

WO2014008589A1 DETERMINING A SKEW ERROR SIGNAL (SES) OFFSET USED TO DETERMINE AN SES TO ADJUST HEADS IN A DRIVE UNIT 审中-公开
标题翻译：确定用于确定驱动单元中调整头的SKEW错误信号（SES）偏移量
公开(公告)号：WO2014008589A1
公开(公告)日：2014-01-16
申请号：PCT/CA2013/050479
申请日：2013-06-21
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM CANADA LIMITED-IBM CANADA LIMITEE
发明人： BUI, Nhan Xuan , PANTAZI, Angeliki , TAKETOMI, Tomoko , TSURUTA, Kazuhiro
IPC分类号： G11B15/18 , G11B5/008 , G11B5/09
CPC分类号： G11B5/588 , G11B5/584 , G11B20/10009 , G11B20/10305 , G11B20/10398 , G11B2220/90
摘要： Provided are a computer program product, system, and method for determining a skew error signal (SES) offset used to determine an SES to adjust heads in a drive unit. A determination is made of a first difference in a first orientation with respect to a direction of movement of the recordable storage media based on first and second position information read by first and second servo read elements on a first head. A determination is made of a second difference in a second orientation with respect to the direction of movement of the recordable storage media based on third and fourth position information read by the first servo read element and a third servo read element on a second head. An offset, calculated based on the determined first and second difference, is used to generate an error signal to adjust the first and second heads.
摘要翻译：提供了一种用于确定用于确定SES以调整驱动单元中的磁头的偏斜误差信号（SES）偏移的计算机程序产品，系统和方法。基于在第一头上的第一和第二伺服读取单元读取的第一和第二位置信息，确定相对于可记录存储介质的移动方向的第一方位的第一差异。基于由第一伺服读取元件读取的第三和第四位置信息和第二头部上的第三伺服读取元件，确定相对于可记录存储介质的移动方向的第二取向的第二差异。基于所确定的第一和第二差异计算的偏移量用于产生误差信号以调整第一和第二磁头。

3. 发明申请

WO2018235011A1 TAPE TRANSPORT CONTROL WITH SUPPRESSION OF TIME-VARYING TENSION DISTURBANCES 审中-公开
公开(公告)号：WO2018235011A1
公开(公告)日：2018-12-27
申请号：PCT/IB2018/054539
申请日：2018-06-20
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM (CHINA) INVESTMENT COMPANY LTD. , IBM DEUTSCHLAND GMBH
发明人： PANTAZI, Angeliki , CHERUBIN, Giovanni , TAKETOMI, Tomoko , BUI, Nhan Xuan , LANTZ, Mark Alfred
IPC分类号： G11B15/43
摘要： Embodiments of the present invention provide a tape transport control system with enhanced regulation of tape tension and velocity over the entire length of the tape. The tape transport control system comprises of circuitry adapted to output and circuitry adapted to receive one or more signals representing a tape velocity, at least one radius of either the first tape reel or the second tape reel, and a tape tension, and based on the received signals, generate at least one control signal to control at least one of the first reel motor or the second reel motor so as to reduce a tension disturbance at a minimum, one frequency corresponding to a time-varying reel-rotation frequency, based on controller parameters that depend on the tape velocity and on the at least one radius of either the first tape reel or the second tape reel.

4. 发明申请

WO2014032458A1 DYNAMICALLY CONTROLLING TAPE VELOCITY 审中-公开
标题翻译：动态控制磁带速度
公开(公告)号：WO2014032458A1
公开(公告)日：2014-03-06
申请号：PCT/CN2013/077610
申请日：2013-06-21
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM (CHINA) CO., LIMITED
发明人： JUDD, Kevin Bruce , JUSTO, Roger Javier , BUI, Nhan Xuan , TAKETOMI, Tomoko , NAKAYAMA, Hirokazu
IPC分类号： G11B21/10
CPC分类号： G11B15/06 , G11B5/584 , G11B15/20 , G11B15/46 , G11B15/52
摘要： A maximum velocity is dynamically determined during a tape drive operation to obtain a statistical standard deviation of a position error signal (PES) that yields an amount of stopwrite (SW) operations that avoids backhitching. The tape velocity is adjusted to the maximum velocity.
摘要翻译：在磁带驱动操作期间动态地确定最大速度，以获得产生避免后向干扰的停止写（SW）操作量的位置误差信号（PES）的统计标准偏差。磁带速度被调整到最大速度。

5. 发明申请

WO2012163251A1 SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR FAST RECOVERY TO WRITE STATE 审中-公开
标题翻译：系统，方法和计算机程序产品快速恢复到写状态
公开(公告)号：WO2012163251A1
公开(公告)日：2012-12-06
申请号：PCT/CN2012/076094
申请日：2012-05-25
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM (CHINA) CO., LIMITED , BUI, Nhan X. , HANCOCK, Reed A. , TAKETOMI, Tomoko
发明人： BUI, Nhan X. , HANCOCK, Reed A. , TAKETOMI, Tomoko
IPC分类号： G11B20/18
CPC分类号： G11B5/56 , G11B5/00817 , G11B5/584 , G11B15/602 , G11B20/10388 , G11B2220/93
摘要： In one embodiment, a tape drive system includes a magnetic head having at least one servo sensor for track-following at least one defined servo track of a longitudinal tape, a tape motion controller configured to move the longitudinal tape past the magnetic head, a compound actuator configured to translate the magnetic head laterally with respect to the longitudinal tape, and a control configured to track-follow the at least one defined servo track by reducing a position error between the magnetic head and a desired position, transition from a write state to a monitor state when the position error is greater than a threshold, transition from the monitor state to a stop write state when the position error is greater than the threshold for a first period, and transition from the monitor state to the write state when the position error is less than the threshold for a second period.
摘要翻译：在一个实施例中，磁带驱动系统包括具有至少一个伺服传感器的磁头，该伺服传感器跟踪至少一个所定义的纵向磁带的伺服磁道，配置成使纵向磁带移动通过磁头的磁带运动控制器，致动器被配置为相对于纵向带横向地平移磁头;以及控制器，其被配置为通过减小磁头与期望位置之间的位置误差跟踪至少一个定义的伺服轨迹，控制器从写入状态转换到当位置误差大于阈值时的监视状态，当位置误差大于第一周期的阈值时从监视状态转变到停止写入状态，以及当位置误差大于阈值时从监视状态转变到写入状态错误小于第二个周期的阈值。

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