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公开(公告)号：US11120827B2
公开(公告)日：2021-09-14
申请号：US15719318
申请日：2017-09-28
IPC分类号： G11B5/702
摘要： According to one embodiment, a magnetic recording medium includes: a substrate; an underlayer positioned above the substrate; a magnetic recording layer positioned above the underlayer; and a plurality of conductive polymers dispersed within the substrate, the underlayer, the magnetic recording layer, the substrate and the underlayer, the substrate and the magnetic recording layer, the underlayer and the magnetic recording layer, or the underlayer, the magnetic recording layer, and the substrate. In addition, the conductive polymers are dispersed such that a concentration of the conductive polymers has a gradient in a single one of the layers in a thickness direction.
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公开(公告)号：US10901825B2
公开(公告)日：2021-01-26
申请号：US16167305
申请日：2018-10-22
摘要： A computer-implemented method according to one embodiment includes receiving at a storage drive, from a host, a data request, implementing the data request at the storage drive, utilizing a streaming mode, and returning, by the storage drive, a confirmation to the host, in response to implementing the data request at the storage drive utilizing the streaming mode.
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公开(公告)号：US20200073587A1
公开(公告)日：2020-03-05
申请号：US16116792
申请日：2018-08-29
发明人： Kevin D. Butt , Roy D. Cideciyan , Simeon Furrer , Mark A. Lantz
摘要： A computer-implemented method according to one embodiment includes identifying code word interleaved (CWI)-4 entries to be re-written to a data storage cartridge, selecting a subset of the CWI-4 entries to be included within a first CWI-4 set, where a plurality of the CWI-4 entries within the subset are associated with a single sub data set (SDS), and re-writing the first CWI-4 set to the data storage cartridge.
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公开(公告)号：US20190267034A1
公开(公告)日：2019-08-29
申请号：US15905865
申请日：2018-02-27
发明人： Nhan X. Bui , Kevin B. Judd , Randy C. Inch , Mark A. Lantz , David H.F. Harper
摘要： A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether a temperature within the tape drive storage unit exceeds a threshold value. In response to determining that the temperature within the tape drive storage unit exceeds the threshold value, a determination is made of a direction of travel of a tape media within the tape drive storage unit. In response to determining that the direction of travel is a forward direction, a first cooling device is powered on. The first cooling device lowers the temperature of a first guide roller and the tape media coming off a first tape storage reel prior to the tape media passing by a read/write head within the tape drive storage unit.
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公开(公告)号：US10395687B1
公开(公告)日：2019-08-27
申请号：US15905865
申请日：2018-02-27
发明人： Nhan X. Bui , Kevin B. Judd , Randy C. Inch , Mark A. Lantz , David H. F. Harper
摘要： A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether a temperature within the tape drive storage unit exceeds a threshold value. In response to determining that the temperature within the tape drive storage unit exceeds the threshold value, a determination is made of a direction of travel of a tape media within the tape drive storage unit. In response to determining that the direction of travel is a forward direction, a first cooling device is powered on. The first cooling device lowers the temperature of a first guide roller and the tape media coming off a first tape storage reel prior to the tape media passing by a read/write head within the tape drive storage unit.
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公开(公告)号：US20190214053A1
公开(公告)日：2019-07-11
申请号：US16358131
申请日：2019-03-19
发明人： Kevin D. Butt , Roy D. Cideciyan , Simeon Furrer , Mark A. Lantz
CPC分类号： G11B20/1833 , G11B5/00813 , G11B20/18 , G11B20/1803 , G11B20/1809 , G11B20/1866 , G11B2020/1843 , G11B2020/1869
摘要： A system includes, according to one embodiment, a magnetic head having a plurality of write transducers configured to store data to tracks of a sequential access medium and a plurality of read transducers. Each read transducer is configured to read data from the sequential access medium after being written thereto by a corresponding write transducer. A first of the read transducers is aligned with a first of the write transducers, wherein the output of the first read transducer is produced during read-while-write. The system also includes a controller and logic integrated with and/or executable by the controller. The logic is configured to read, using the plurality of read transducers, encoded data from a plurality of tracks of the sequential access medium simultaneously. The logic is configured to determine that one or more tracks of the sequential access medium are dead within a sliding window and rewrite a set of encoded data from the one or more dead tracks to one or more live tracks in a rewrite area of the sequential access medium. Other systems, methods, and computer program products are described according to more embodiments.
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公开(公告)号：US10255942B2
公开(公告)日：2019-04-09
申请号：US15244508
申请日：2016-08-23
摘要： A tape transport control system with enhanced regulation of tape tension and velocity over the entire length of the tape. For example, a closed-loop control system for controlling a tape transport includes circuitry adapted to output a signal representing a tape velocity at a tape head, circuitry adapted to output a signal representing a tape velocity at the first tape reel and a signal representing a tape velocity at the second tape reel, circuitry adapted to output a signal representing a tape tension, and circuitry adapted to, based on the received signals, generate control signals to control the tape velocity at least at one of the tape head, the first tape reel, the second tape reel, and the tension of the tape, using controller gains that depend on a longitudinal position of the tape, and to implement a system transfer function that is approximately independent of the longitudinal position.
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公开(公告)号：US10204649B2
公开(公告)日：2019-02-12
申请号：US15967355
申请日：2018-04-30
发明人： Nhan X. Bui , Giovanni Cherubini , Simeon Furrer , Mark A. Lantz
摘要： A tape drive-implemented method, according to one embodiment, includes: causing a servo reader to move in a first direction over a high-density servo pattern which includes a plurality of high-density servo tracks. Each of the servo tracks includes at least two patterns written at different frequencies to produce different periodic waveforms during readback. Moreover, a readback signal is received from the servo reader as the servo reader moves in the first direction. The readback signal is used to set a gain parameter for each of the respective periodic waveforms. Other systems, methods, and computer program products are described in additional embodiments.
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公开(公告)号：US20180240485A1
公开(公告)日：2018-08-23
申请号：US15439790
申请日：2017-02-22
发明人： Nhan X. Bui , Giovanni Cherubini , Simeon Furrer , Mark A. Lantz
IPC分类号： G11B5/592
CPC分类号： G11B5/5926
摘要： A tape drive-implemented method, according to another embodiment, includes: determining a length of a window of a servo pattern to use for calculating a lateral position estimate, determining a number of the windows of the servo pattern to use for calculating a lateral position value, receiving signals corresponding to each of the number of the windows of the servo pattern from a single servo channel, calculating a lateral position estimate for each of the number of the windows of the servo pattern, calculating the lateral position value by using the lateral position estimates, and using the lateral position value to control a tape head actuator. Other systems, methods, and computer program products are described in additional embodiments.
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公开(公告)号：US20180240484A1
公开(公告)日：2018-08-23
申请号：US15439760
申请日：2017-02-22
发明人： Nhan X. Bui , Giovanni Cherubini , Simeon Furrer , Randy C. Inch , Mark A. Lantz , Angeliki Pantazi
IPC分类号： G11B5/592
CPC分类号： G11B5/5926
摘要： A tape drive-implemented method, according to one embodiment, includes: determining a number of lateral position estimates to use for calculating a lateral position value, receiving lateral position estimates from a single servo channel, calculating the lateral position value by using the number of lateral position estimates, and using the lateral position value to control a tape head actuator. Other systems, methods, and computer program products are described in additional embodiments.
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