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1. 发明授权

US10650853B2 Tape damage detection 有权
公开(公告)号：US10650853B2
公开(公告)日：2020-05-12
申请号：US16289389
申请日：2019-02-28
申请人： International Business Machines Corporation
发明人： Nhan X. Bui , Randy C. Inch , David L. Swanson , Tomoko Taketomi
IPC分类号： G11B15/43 , G11B5/588 , G11B5/584 , G11B5/008 , G11B5/02
摘要： In one general embodiment, a method includes calculating a differential position value based on readback signals from at least two servo readers of a magnetic head reading servo tracks of a magnetic recording tape. The differential position value is compared to a previously-calculated differential position value. An action is performed in response to determining that the difference between the differential position value and the previously-calculated differential position value is in a predefined range. In another general embodiment, an apparatus includes a magnetic head having at least two servo readers, and a controller in communication with the servo readers. The controller is configured to detect a sudden change in a width of a magnetic recording tape based on a differential position value derived from relatively more current servo readback data and a second differential position value derived from relatively older servo readback data.

2. 发明申请

US20160260449A1 MEASUREMENT AND CORRECTION OF MAGNETIC WRITER OFFSET ERROR 有权
标题翻译：磁性写入偏移的测量和校正
公开(公告)号：US20160260449A1
公开(公告)日：2016-09-08
申请号：US14641185
申请日：2015-03-06
申请人： International Business Machines Corporation
发明人： Said A. Ahmad , Ernest S. Gale , David L. Swanson
IPC分类号： G11B5/584 , G11B5/008 , G11B20/12
CPC分类号： G11B5/584 , G11B5/00813 , G11B5/00826 , G11B20/1201 , G11B20/18
摘要： A method, according to one embodiment, includes writing a plurality of shingled tracks using an array of writers, determining first and second positions of an array of readers relative to the shingled tracks, the first and second positions being above and/or beyond track edges of the shingled tracks, repositioning the array of readers to various locations between the first and second positions and reading data from the shingled tracks, determining a read offset point where read performance is about the highest during the reading performed when repositioning the array of readers between the first and second positions, and computing, using the read offset point, data describing a lateral writing position to use during writing such that shingled tracks are written in a location specified by a format. Other systems, methods, and computer program products are described in additional embodiments.
摘要翻译：根据一个实施例的方法包括使用写入器阵列来写入多个带状光的轨道，确定读取器阵列相对于带状光轨的第一和第二位置，第一和第二位置在轨迹边缘之上和/或之上将读取器阵列重新定位在第一和第二位置之间的各个位置，并且从带有纹理轨迹读取数据，确定读取偏移点，其中在读取读取器阵列重新定位时读取性能是最高的第一和第二位置，并且使用读取的偏移点来计算描述在写入期间使用的横向写入位置的数据，使得带状轨迹被写入由格式指定的位置。在另外的实施例中描述了其他系统，方法和计算机程序产品。

3. 发明申请

US20160196846A1 DYNAMICALLY OPTIMIZING READ PERFORMANCE BY ADJUSTING SERVO-BASED HEAD LOCATION 有权
标题翻译：通过调整基于伺服器头部位置的动态优化阅读性能
公开(公告)号：US20160196846A1
公开(公告)日：2016-07-07
申请号：US15068462
申请日：2016-03-11
申请人： International Business Machines Corporation
发明人： Ernest S. Gale , Randy C. Inch , Kevin B. Judd , David L. Swanson
IPC分类号： G11B5/584 , G11B5/008
CPC分类号： G11B5/584 , G11B5/00813 , G11B5/012 , G11B27/36 , G11B2220/956
摘要： A computer-implemented method includes: determining a reading performance of a head positioned at a commanded lateral reading location based on one or more metrics; adjusting a lateral reading location of the head relative to a medium by moving the head in a lateral direction away from the commanded lateral reading location to an adjusted lateral reading location; determining a reading performance of the head after the adjusting; comparing the reading performance after the adjusting to the reading performance before the adjusting for determining whether the reading performance has improved; and selecting an optimal lateral reading location based on the comparing. The one or more metrics are selected from a group consisting of C1 error correction rate, and C2 error correction rate. Corresponding systems and computer program products are also disclosed.
摘要翻译：计算机实现的方法包括：基于一个或多个度量来确定位于命令的横向阅读位置的头部的阅读性能; 通过使头部在远离所指示的侧向读取位置的横向方向上移动到调整的侧向读取位置来调节头部相对于介质的横向读取位置; 确定调整后头部的阅读性能; 将调整后的读取性能与调整前的读取性能进行比较，以确定读取性能是否改善; 并且基于所述比较来选择最佳侧向读取位置。一个或多个度量是从由C1纠错率和C2纠错率组成的组中选出的。还公开了相应的系统和计算机程序产品。

4. 发明申请

US20170032817A1 TAPE DAMAGE DETECTION 审中-公开
标题翻译：胶带损伤检测
公开(公告)号：US20170032817A1
公开(公告)日：2017-02-02
申请号：US14815901
申请日：2015-07-31
申请人： International Business Machines Corporation
发明人： Nhan X. Bui , Randy C. Inch , David L. Swanson , Tomoko Taketomi
IPC分类号： G11B20/18 , G11B5/008 , G11B5/56
CPC分类号： G11B5/584 , G11B5/00826 , G11B5/02
摘要： In one general embodiment, a method includes calculating a differential position value based on readback signals from at least two servo readers of a magnetic head reading servo tracks of a magnetic recording tape. The differential position value is compared to a previously-calculated differential position value. An action is performed in response to determining that the difference between the differential position value and the previously-calculated differential position value is in a predefined range. In another general embodiment, an apparatus includes a magnetic head having at least two servo readers, and a controller in communication with the servo readers. The controller is configured to detect a sudden change in a width of a magnetic recording tape based on a differential position value derived from relatively more current servo readback data and a second differential position value derived from relatively older servo readback data.
摘要翻译：在一个一般实施例中，一种方法包括基于来自磁记录带的磁头读取伺服磁道的至少两个伺服读取器的回读信号来计算差分位置值。将差分位置值与先前计算出的差分位置值进行比较。响应于确定差分位置值和先前计算的差分位置值之间的差异在预定范围内来执行动作。在另一个一般实施例中，一种装置包括具有至少两个伺服读取器的磁头和与伺服读取器通信的控制器。控制器被配置为基于从相对较多的当前伺服回读数据导出的差分位置值和从相对较旧的伺服回读数据导出的第二差分位置值来检测磁记录带的宽度的突然变化。

5. 发明授权

US09299374B2 Dynamically optimizing read performance by adjusting servo-based head location 有权
标题翻译：通过调整基于伺服的头位置动态优化读取性能
公开(公告)号：US09299374B2
公开(公告)日：2016-03-29
申请号：US14332277
申请日：2014-07-15
申请人： International Business Machines Corporation
发明人： Ernest S. Gale , Randy C. Inch , Kevin B. Judd , David L. Swanson
IPC分类号： G11B27/36 , G11B21/02 , G11B5/584 , G11B5/008 , G11B5/012
CPC分类号： G11B5/584 , G11B5/00813 , G11B5/012 , G11B27/36 , G11B2220/956
摘要： In one embodiment, a method includes determining a reading performance based on one or more metrics, adjusting a commanded lateral reading location of a head relative to a medium, determining the reading performance after the adjusting, comparing the reading performance after the adjusting relative to the reading performance before the adjusting for determining whether the reading performance has improved, and selecting a commanded lateral reading location based on the comparing. In another embodiment, a controller is configured to perform the foregoing method. In yet another embodiment, a computer program product includes a computer readable storage medium having program instructions embodied therewith, the program instructions readable and/or executable by a controller configured to perform the foregoing method.
摘要翻译：在一个实施例中，一种方法包括基于一个或多个度量来确定读取性能，调整头部相对于介质的指令的横向读取位置，确定调整之后的读取性能，比较相对于调整之后的读取性能在调整之前，读取性能，以确定读取性能是否改善，以及基于该比较选择一个指令的侧向读取位置。在另一实施例中，控制器被配置为执行前述方法。在另一个实施例中，计算机程序产品包括具有与之体现的程序指令的计算机可读存储介质，由可配置为执行前述方法的控制器可读和/或可执行的程序指令。

6. 发明授权

US11448493B2 Calibration of writer offset using media dimensional stability 有权
公开(公告)号：US11448493B2
公开(公告)日：2022-09-20
申请号：US16201739
申请日：2018-11-27
申请人： International Business Machines Corporation
发明人： Kevin B. Judd , Randy C. Inch , David L. Swanson
IPC分类号： G11B5/54 , G01B3/1061 , G01B3/1041 , G01B3/1084 , G01B3/1003 , G11B5/008 , G01B3/1094
摘要： In one embodiment, a method includes writing, using a magnetic head, a set of parallel shingled tracks onto a magnetic recording tape using specified drive parameters, changing one of the specified drive parameters, reading a set of selected data tracks on the magnetic recording tape using the changed drive parameter, changing a lateral head position while reading the set of selected data tracks using the changed drive parameter, comparing track error rates observed during reading at the different lateral head positions, selecting a reader offset value based on the comparing, and performing a further action using the selected reader offset value.

7. 发明申请

US20200166322A1 CALIBRATION OF WRITER OFFSET USING MEDIA DIMENSIONAL STABILITY 审中-公开
公开(公告)号：US20200166322A1
公开(公告)日：2020-05-28
申请号：US16201739
申请日：2018-11-27
申请人： International Business Machines Corporation
发明人： Kevin B. Judd , Randy C. Inch , David L. Swanson
IPC分类号： G01B3/10
摘要： In one embodiment, a method includes writing, using a magnetic head, a set of parallel shingled tracks onto a magnetic recording tape using specified drive parameters, changing one of the specified drive parameters, reading a set of selected data tracks on the magnetic recording tape using the changed drive parameter, changing a lateral head position while reading the set of selected data tracks using the changed drive parameter, comparing track error rates observed during reading at the different lateral head positions, selecting a reader offset value based on the comparing, and performing a further action using the selected reader offset value.

8. 发明授权

US10283153B2 Tape damage detection 有权
公开(公告)号：US10283153B2
公开(公告)日：2019-05-07
申请号：US16036821
申请日：2018-07-16
申请人： International Business Machines Corporation
发明人： Nhan X. Bui , Randy C. Inch , David L. Swanson , Tomoko Taketomi
IPC分类号： G11B5/58 , G11B5/584 , G11B5/008 , G11B5/02
摘要： In one general embodiment, a method includes calculating a differential position value based on readback signals from at least two servo readers of a magnetic head reading servo tracks of a magnetic recording tape. The differential position value is compared to a previously-calculated differential position value. An action is performed in response to determining that the difference between the differential position value and the previously-calculated differential position value is in a predefined range. The differential position value is an average of differential position values for a set of samples, wherein the previously-calculated differential position value is an average of previously-calculated differential position values for a set of previously-obtained samples. In another general embodiment, an apparatus includes a magnetic head having servo readers and a controller in communication with the servo readers. The controller is configured to detect a sudden change in a width of a magnetic recording tape.

9. 发明申请

US20160019919A1 DYNAMICALLY OPTIMIZING READ PERFORMANCE BY ADJUSTING SERVO-BASED HEAD LOCATION 有权
标题翻译：通过调整基于伺服器头部位置的动态优化阅读性能
公开(公告)号：US20160019919A1
公开(公告)日：2016-01-21
申请号：US14332277
申请日：2014-07-15
申请人： International Business Machines Corporation
发明人： Ernest S. Gale , Randy C. Inch , Kevin B. Judd , David L. Swanson
IPC分类号： G11B5/584 , G11B27/36
CPC分类号： G11B5/584 , G11B5/00813 , G11B5/012 , G11B27/36 , G11B2220/956
摘要： In one embodiment, a method includes determining a reading performance based on one or more metrics, adjusting a commanded lateral reading location of a head relative to a medium, determining the reading performance after the adjusting, comparing the reading performance after the adjusting relative to the reading performance before the adjusting for determining whether the reading performance has improved, and selecting a commanded lateral reading location based on the comparing. In another embodiment, a controller is configured to perform the foregoing method. In yet another embodiment, a computer program product includes a computer readable storage medium having program instructions embodied therewith, the program instructions readable and/or executable by a controller configured to perform the foregoing method.
摘要翻译：在一个实施例中，一种方法包括基于一个或多个度量来确定读取性能，调整头部相对于介质的指令的横向读取位置，确定调整之后的读取性能，比较相对于调整之后的读取性能在调整之前，读取性能，以确定读取性能是否改善，以及基于该比较选择一个指令的侧向读取位置。在另一实施例中，控制器被配置为执行前述方法。在另一个实施例中，计算机程序产品包括具有与之体现的程序指令的计算机可读存储介质，由可配置为执行前述方法的控制器可读和/或可执行的程序指令。

10. 发明申请

US20190198049A1 TAPE DAMAGE DETECTION 审中-公开
公开(公告)号：US20190198049A1
公开(公告)日：2019-06-27
申请号：US16289389
申请日：2019-02-28
申请人： International Business Machines Corporation
发明人： Nhan X. Bui , Randy C. Inch , David L. Swanson , Tomoko Taketomi
IPC分类号： G11B5/584 , G11B5/008
CPC分类号： G11B5/584 , G11B5/00826 , G11B5/02
摘要： In one general embodiment, a method includes calculating a differential position value based on readback signals from at least two servo readers of a magnetic head reading servo tracks of a magnetic recording tape. The differential position value is compared to a previously-calculated differential position value. An action is performed in response to determining that the difference between the differential position value and the previously-calculated differential position value is in a predefined range. In another general embodiment, an apparatus includes a magnetic head having at least two servo readers, and a controller in communication with the servo readers. The controller is configured to detect a sudden change in a width of a magnetic recording tape based on a differential position value derived from relatively more current servo readback data and a second differential position value derived from relatively older servo readback data.

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