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1. 发明授权

US11120825B1 Modifying seek operations mid-seek 有权
公开(公告)号：US11120825B1
公开(公告)日：2021-09-14
申请号：US16855069
申请日：2020-04-22
申请人： Seagate Technology LLC
发明人： Raye A. Sosseh , Brian Thomas Edgar , Josiah Natan Wernow , Paul Michael Wiggins
IPC分类号： G11B15/46 , G11B5/54 , G11B5/55
摘要： Illustrative systems and methods disclosed herein may change or modify a seek during mid-seek for various reasons and may set seek speeds for various seeks to less than the maximum possible seek speed to, for example, facilitate seek target change or modifications mid-seek. For instance, the seek speeds for lower priority commands or commands at risk for deprioritization may be set to speeds less than the maximum possible seek speed.

2. 发明申请

US20200273491A1 TUNNEL MAGNETORESISTIVE SENSOR WITH ALLOY SEED LAYER 审中-公开
公开(公告)号：US20200273491A1
公开(公告)日：2020-08-27
申请号：US16282195
申请日：2019-02-21
申请人： International Business Machines Corporation
发明人： Robert G. Biskeborn , Calvin S. Lo , Jason Liang
IPC分类号： G11B15/46 , G11B5/008
摘要： In one general approach, an apparatus includes a sensor having an active tunnel magnetoresistive region, magnetic shields flanking the active tunnel magnetoresistive region, and gaps between the active tunnel magnetoresistive region and the magnetic shields. The active tunnel magnetoresistive region includes a free layer, a tunnel barrier layer and a reference layer. At least one of the gaps includes a seed layer of a chromium alloy and an electrically conductive layer having a refractory material formed on the seed layer. The seed layer in this configuration is more resistant to corrosion than elemental chromium when used in a magnetic recording head and/or in a structure exposed to even trace amounts of fluorine.

3. 发明授权

US10657992B2 Tunnel valve magnetic tape head for multichannel tape recording 有权
公开(公告)号：US10657992B2
公开(公告)日：2020-05-19
申请号：US15938981
申请日：2018-03-28
申请人： International Business Machines Corporation
发明人： Robert G. Biskeborn , Robert E. Fontana, Jr. , Calvin S. Lo
IPC分类号： G11B5/39 , G11B15/46
摘要： An apparatus, according to one embodiment, includes: a plurality of tunnel valve read transducers arranged in an array extending along a read module. Each of the tunnel valve read transducers includes: a sensor structure having a cap layer, a free layer, a tunnel barrier layer, a reference layer and an antiferromagnetic layer, and electrically insulating layers on opposite sides of the sensor structure. Moreover, a height of the free layer measured in a direction perpendicular to a media bearing surface of the read module is less than a width of the free layer measured in a cross-track direction perpendicular to an intended direction of media travel.

4. 发明授权

US10566022B1 Management of head and media dimensional stability 有权
公开(公告)号：US10566022B1
公开(公告)日：2020-02-18
申请号：US16528475
申请日：2019-07-31
申请人： International Business Machines Corporation
发明人： Kevin B. Judd , Randy C. Inch , Eiji Ogura , Ernest S. Gale , Pamela R. Nylander-Hill , Dale A. Christiansen , Paul M. Greco , Kevin D. Butt , Steven M. Wallace
IPC分类号： G11B15/46 , G11B15/43 , G11B15/18 , G11B5/008 , G11B5/588
摘要： An apparatus configured to characterize a magnetic recording tape of a tape cartridge, according to one embodiment, includes a magnetic head having servo readers of known pitch, a drive mechanism for passing a magnetic recording tape over the magnetic head, and a controller electrically coupled to the magnetic head. The controller is configured to measure, using signals from the magnetic head, a servo band difference at various locations along a length of the magnetic recording tape of a tape cartridge. The controller is also configured to store the servo band difference measurements and/or derivatives thereof in association with the tape cartridge.

5. 发明授权

US10348220B2 Three-phase motor controlling system for data storage device 有权
公开(公告)号：US10348220B2
公开(公告)日：2019-07-09
申请号：US16004494
申请日：2018-06-11
申请人： Renesas Electronics Corporation
发明人： Minoru Kurosawa , Seigi Ishiji
IPC分类号： G11B19/20 , H02P3/12 , H02P7/025 , H02P7/293 , H02P29/68 , H02P7/29 , G11B19/28 , G11B5/54 , G11B15/46
摘要： A PWM modulation circuit controls low-side transistors of three phases to all be in an ON state when a brake current flows; controls, in a period in which a brake current flows in a first direction in one phase, a transistor for sensing in that one phase to be in an ON state; and controls, in a period in which a brake current flows in the first direction in two phases, transistors for three phases to be in an OFF state. When the brake current is to flow, sense-phase control circuits for the three phases control a transistor for sensing, in a phase in which the brake current flows in a sink direction, to be into an ON state, and controls the transistor for sensing in a phase in which the brake current flows in an opposite direction, to be into an OFF state.

6. 发明授权

US10152995B2 Magnetic tape device and head tracking servo method 有权
公开(公告)号：US10152995B2
公开(公告)日：2018-12-11
申请号：US15920768
申请日：2018-03-14
申请人： FUJIFILM Corporation
发明人： Norihito Kasada , Eiki Ozawa
IPC分类号： G11B15/46 , G11B5/78 , G11B5/714 , G11B5/584 , G11B5/706 , G11B5/39 , G11B5/008
摘要： The magnetic tape device includes a magnetic tape including a magnetic layer, in which an intensity ratio of a peak intensity of a diffraction peak of a (110) plane with respect to a peak intensity of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00, Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, and a C—H derived C concentration calculated from a C—H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on the surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 45 to 65 atom %.

7. 发明申请

US20170154642A1 SHORTING-RESISTANT CURRENT PERPENDICULAR TO PLANE SENSORS 有权
公开(公告)号：US20170154642A1
公开(公告)日：2017-06-01
申请号：US14954927
申请日：2015-11-30
申请人： International Business Machines Corporation
发明人： Robert G. Biskeborn , Calvin S. Lo
IPC分类号： G11B5/39 , G11B5/127 , G11B15/46 , G11B5/008
CPC分类号： G11B5/00826
摘要： In one general embodiment, an apparatus includes a current perpendicular to plane magnetic read transducer having a sensor and only a single magnetic shield. In another general embodiment, an apparatus includes a magnetic read transducer having a sensor, a first magnetic shield, and a second magnetic shield. A portion of the second magnetic shield aligned with the sensor in an intended direction of tape travel thereacross has a thickness along the intended direction that is about 50% or less than a thickness of a portion of the first magnetic shield aligned in the intended direction with the portion of the second magnetic shield.

8. 发明授权

US09483107B2 Adaptive idle timeout for storage devices 有权
标题翻译：存储设备的自适应空闲超时
公开(公告)号：US09483107B2
公开(公告)日：2016-11-01
申请号：US14513099
申请日：2014-10-13
申请人： Microsoft Technology Licensing, LLC
发明人： Tristan Charles Griffith , James C. Bovee , Bruce J. Sherwin, Jr. , Tobias Marius Klima , Philipp Ruilin Liu
IPC分类号： G06F1/00 , G11B15/46 , G06F1/32 , G06F3/06
CPC分类号： G06F1/3296 , G06F1/324 , G06F3/0616 , G06F3/0625 , G06F3/0634 , G06F3/0676 , G06F3/068 , Y02D10/154
摘要： In embodiments of adaptive idle timeout for storage devices, a computing device includes a storage device that stores data for read and write access on a rotating media. An operating system of the computing device maintains a device cycle number as an accounting of each time the storage device is powered on-off. The computing device implements a storage device driver that is implemented to obtain the device cycle number of the storage device from the operating system, and determine a projected cycle number over a duration of operational time of the storage device based on the device cycle number. The storage device driver can then determine whether the projected cycle number exceeds a maximum of power on-off cycles within a warranty period of the storage device, and control a frequency of the storage device being powered-off if the projected cycle number exceeds the maximum of power on-off cycles.
摘要翻译：在存储设备的自适应空闲超时的实施例中，计算设备包括存储设备，其存储用于在旋转介质上进行读取和写入访问的数据。计算设备的操作系统将设备周期数维护为每当存储设备通电时的计费。该计算设备实现了一种存储设备驱动器，其被实现为从操作系统获得存储设备的设备周期数，并且基于设备周期数确定存储设备的操作时间的持续时间内的预计周期数。然后，存储设备驱动程序可以确定投影周期数是否超出存储设备的保修期内的最大电源开/关周期，并且如果所计算的周期数超过最大值则控制存储设备的断电频率的电源开关周期。

9. 发明授权

US09449638B2 Controlling the transport of a tape within a tape transport system 有权
标题翻译：控制磁带传送系统内的磁带的传输
公开(公告)号：US09449638B2
公开(公告)日：2016-09-20
申请号：US14244323
申请日：2014-04-03
申请人： International Business Machines Corporation
发明人： Giovanni Cherubini , Jens Jelitto , Eiji Ogura , Angeliki Pantazi
IPC分类号： G11B15/46 , G11B15/18 , G11B15/43 , G11B15/54 , G11B15/44
CPC分类号： G11B15/46 , G11B15/1875 , G11B15/43 , G11B15/44 , G11B15/54
摘要： A control device for controlling the transport of a tape within a tape transport system, the tape transport system having a head being operable to read data from and/or write data to the tape, an outboard reel and an inboard reel, wherein the tape is moveable from the outboard reel to the inboard reel in forward direction or from the inboard reel to the outboard reel in reverse direction, wherein the control device is adapted to generate control signals to control the velocity of the outboard reel and the velocity of the inboard reel as a function of a primary velocity of the tape at the head and a secondary velocity of the tape at the inboard reel and/or a secondary velocity of the tape at the outboard reel.
摘要翻译：一种用于控制磁带传送系统内的磁带传输的控制装置，磁带传输系统具有一个头部，用于从数据读取数据和/或将数据写入磁带，外侧卷轴和内侧卷轴，其中磁带是从外侧卷轴向前移动的内侧卷轴或从内侧卷轴向反方向移动，其中控制装置适于产生控制信号以控制外侧卷盘的速度和内侧卷轴的速度作为磁带头部的初速度和内侧卷轴上的带子的次速度和/或在外侧卷轴上的带的次速度的函数。

10. 发明授权

US09262081B2 Method for reading file using plurality of tape media 有权
公开(公告)号：US09262081B2
公开(公告)日：2016-02-16
申请号：US14674171
申请日：2015-03-31
申请人： International Business Machines Corporation
发明人： Takashi Ashida , Hiroshi Itagaki , Setsuko Masuda , Tsuyoshi Miyamura , Terue Watanabe
IPC分类号： G11B15/46 , G11B5/55 , G06F3/06 , G06F12/08 , G11B27/00 , G11B27/11 , G11B5/008
CPC分类号： G06F3/0611 , G06F3/0613 , G06F3/0643 , G06F3/0656 , G06F3/0686 , G06F12/0866 , G06F2003/0691 , G06F2003/0698 , G06F2212/1024 , G06F2212/213 , G11B5/00813 , G11B27/002 , G11B27/11 , G11B2220/90
摘要： A storage system includes a plurality of tape drives connected to a host, and a buffer configured to temporarily hold data read from the drives. A mechanism loads a plurality of media on which a file has been written to the plurality of drives so as to mount the plurality of media in the plurality of drives and divides the file into a plurality of data portions in an order. The mechanism determines a medium that takes the shortest time to move from a current position of a read head of a corresponding drive to a beginning position of the file and one or more media from which following data portions of the beginning data portion are to be read. The mechanism executes reading of the following data portions from the next media and temporarily holding of the read following data portions in the buffer of the storage system while reading the beginning data portion of the file from the first medium to the host.

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