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公开(公告)号：US20160148645A1
公开(公告)日：2016-05-26
申请号：US14724523
申请日：2015-05-28
Applicant: Seagate Technology LLC
Inventor： Wenzhong Zhu , Kenneth A. Haapala , Kaizhong Gao , Edward Gage
CPC classification number: G11B20/1217 , G06F12/0238 , G06F2212/1044 , G06F2212/152 , G06F2212/21 , G06F2212/70 , G11B5/012 , G11B5/09 , G11B2020/1238 , G11B2020/1292
Abstract: A storage device includes a multi-reader transducer head with a first reader and a second reader having an effective cross-track separation equal to a multiple of a defined track-pitch of a storage medium of the storage device. The effective cross-track separation may permit for a simultaneous data read of two non-adjacent data tracks.
Abstract translation: 存储装置包括具有第一读取器和第二读取器的多读取器换能器头，其具有等于存储装置的存储介质的确定的轨道间距的倍数的有效跨轨道间隔。 有效的跨轨道分离可以允许两个非相邻数据轨道的同时数据读取。
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公开(公告)号：US11354398B2
公开(公告)日：2022-06-07
申请号：US16806831
申请日：2020-03-02
Applicant: Seagate Technology LLC
Inventor： Riyan Alex Mendonsa , Saravanan Nagarajan , Kenneth A. Haapala
Abstract: A secure cartridge-based storage system includes a set of read/write control electronics on a control board adapted to removably couple with each of a plurality of storage cartridges. For each individual storage cartridge, the read/write electronics are adapted to retrieve a unique device identifier from the storage cartridge; retrieve an encryption key stored on the control board in association with the unique device identifier; and utilize the encryption key to encrypt or decrypt data that is in transit to or from a target storage location on the storage media.
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公开(公告)号：US20170243609A1
公开(公告)日：2017-08-24
申请号：US15591270
申请日：2017-05-10
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Wenzhong Zhu , Kenneth A. Haapala , Bin Huang
CPC classification number: G11B5/59627 , G11B5/012 , G11B5/40 , G11B19/046 , G11B20/18 , G11B27/36 , G11B33/144
Abstract: Systems and methods for determining a relationship between write fault threshold and temperature are described. The systems and methods include measuring an operating temperature of the storage device, determining a current operating temperature of the storage device, determining whether the current operating temperature of the storage device satisfies a temperature threshold, and upon determining the current operating temperature of the storage device satisfies the temperature threshold, modifying a write fault threshold associated with a data track of the storage device.
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公开(公告)号：US09741379B1
公开(公告)日：2017-08-22
申请号：US15099383
申请日：2016-04-14
Applicant: Seagate Technology LLC
Inventor： Reed D. Hanson , Kenneth A. Haapala
CPC classification number: G11B5/5547 , G11B5/5552 , G11B5/5556 , G11B5/556
Abstract: A method is disclosed for positioning a transducer over a magnetic recording medium having a plurality of tracks. The method includes positioning the transducer over a first track using a voice coil motor (VCM) and a microactuator. The method further includes applying a feedforward voltage profile to the microactuator to position the transducer over a second track.
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Patent Agency Ranking
公开(公告)号：US09728213B1
公开(公告)日：2017-08-08
申请号：US15170811
申请日：2016-06-01
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Reed D. Hanson , Kenneth A. Haapala , Dwight R. Kinney , Xinghui Huang
CPC classification number: G11B5/556 , G11B5/4873 , G11B5/59622
Abstract: Systems and methods for compensating for hysteresis in a disc drive are described. In one embodiment, a method may use an inverse hysteresis model to linearize effects of hysteresis of a microactuator in the disc drive. The hysteresis model may be a Coleman-Hodgdon hysteresis model. The hysteresis of the microactuator may be characterized, and the inverse hysteresis model may be based at least in part on the characterization. The inverse hysteresis model may be used to implement a digital filter. The digital filter may be employed in series with the microactuator to linearize the effects of hysteresis.
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16.发明授权Repeated runout (RRO) compensation for alternating tracks in an interlaced magnetic recording system 有权在隔行磁记录系统中交替轨迹的重复跳动（RRO）补偿公开(公告)号：US09508370B1
公开(公告)日：2016-11-29
申请号：US15165492
申请日：2016-05-26
Applicant: Seagate Technology LLC
Inventor： Wenzhong Zhu , Peter S. Harllee , Ralph William Cross , Kenneth A. Haapala , Edward Charles Gage
IPC: G11B5/596
CPC classification number: G11B5/59627
Abstract: Method and apparatus for controlling the position of a control object in a closed loop control system, such as a servo control system used in a data storage device. In some embodiments, spaced apart first and second data tracks are written to a rotatable data recording medium without using repeated runout (RRO) compensation values to correct for RRO error in servo data written to the medium. A third data track is subsequently written so as to be interspersed between and partially overlap the first and second data tracks. The third data track is written using a set of RRO compensation values to correct for the RRO error in the servo data.
Abstract translation: 用于控制诸如在数据存储装置中使用的伺服控制系统的闭环控制系统中的控制对象的位置的方法和装置。 在一些实施例中，将间隔开的第一和第二数据磁道写入可旋转的数据记录介质，而不使用重复的跳动（RRO）补偿值来校正写入介质的伺服数据中的RRO误差。 随后写入第三数据磁道，以便分散在第一和第二数据磁道之间并部分重叠。 使用一组RRO补偿值来写入第三条数据轨道，以校正伺服数据中的RRO错误。
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公开(公告)号：US09934802B2
公开(公告)日：2018-04-03
申请号：US15670942
申请日：2017-08-07
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Reed D. Hanson , Kenneth A. Haapala , Dwight R. Kinney , Xinghui Huang
CPC classification number: G11B5/556 , G11B5/4873 , G11B5/59622
Abstract: Systems and methods for compensating for hysteresis in a disc drive are described. In one embodiment, a method may use an inverse hysteresis model to linearize effects of hysteresis of a microactuator in the disc drive. The hysteresis model may be a Coleman-Hodgdon hysteresis model. The hysteresis of the microactuator may be characterized, and the inverse hysteresis model may be based at least in part on the characterization. The inverse hysteresis model may be used to implement a digital filter. The digital filter may be employed in series with the microactuator to linearize the effects of hysteresis.
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公开(公告)号：US20170200468A1
公开(公告)日：2017-07-13
申请号：US14993694
申请日：2016-01-12
Applicant: Seagate Technology LLC
Inventor： Wenzhong Zhu , Mehmet F. Erden , Kenneth A. Haapala , Wei Tian , Edward Gage
IPC: G11B20/12
CPC classification number: G11B20/1217 , G11B5/012 , G11B5/1278 , G11B5/4813 , G11B5/4886 , G11B20/10009 , G11B2020/1238
Abstract: Implementations described and claimed herein includes a storage device comprising a plurality of readers, including a first subset of readers configured to read a first subset of tracks and a second subset of readers configured to read a second subset of tracks, the first subset of tracks being wider than the second subset of tracks. In another implementation, the readers in the first subset of readers are wider than the readers in the second subset of readers. The wider readers may be configured to recover servo information and the narrow readers may be configured to recover data information. The storage devices may include two-dimensional magnetic recording, conventional perpendicular magnetic recording, shingled magnetic recording, multi-sensor magnetic recording, and interlaced magnetic recording.
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公开(公告)号：US20170178672A1
公开(公告)日：2017-06-22
申请号：US14977313
申请日：2015-12-21
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Wenzhong Zhu , Kenneth A. Haapala , Bin Huang
CPC classification number: G11B5/59627 , G11B5/012 , G11B5/40 , G11B19/046 , G11B20/18 , G11B27/36 , G11B33/144
Abstract: Systems and methods for determining a relationship between write fault threshold and temperature are described. The systems and methods include measuring an operating temperature of the storage device, determining a current operating temperature of the storage device, determining whether the current operating temperature of the storage device satisfies a temperature threshold, and upon determining the current operating temperature of the storage device satisfies the temperature threshold, modifying a write fault threshold associated with a data track of the storage device.
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