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公开(公告)号：US20190103138A1
公开(公告)日：2019-04-04
申请号：US16205928
申请日：2018-11-30
Applicant: Seagate Technology LLC
Inventor： Jian Qiang , Xiong Liu , Choon Wei Ng , Sangyun Jung
Abstract: The disclosed technology includes methods and systems that reduce off-track write retry operations in shingled magnetic recording systems. In one implementation, the method includes writing data to an initial track, determining which side of the initial track is a shingled side, calculating a percentage of position error signal (PES) at a shingled side end of the initial track (PES1) when an off-track write operation occurs, determining whether the PES1 meets a first pre-determined threshold, continue writing data to a second track responsive to determining the PES1 is below a first pre-determined threshold, calculating a percentage of PES at a shingled side end of the second track (PES2), determining whether a combined value of PES1 and PES2 is above a second predetermined threshold to determine a probability value of the initial track being erased, and continue writing to a third track if the combined value is below the second predetermined threshold.
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公开(公告)号：US20190080724A1
公开(公告)日：2019-03-14
申请号：US15704492
申请日：2017-09-14
Applicant: Seagate Technology LLC
Inventor： Lihong Maruti Zhang , Xiong Liu , Hao Sun
IPC: G11B33/14
Abstract: A breather filter for reducing water in a data storage device housing includes an outer layer, an inner layer, and an intermediary layer positioned between the inner and outer layers. The outer layer includes an outer layer of hydrophilic material. The inner layer includes at least one of an inner layer of hydrophobic material and an inner layer of hydrophilic material. The intermediary layer includes a water adsorbing material, and fibers that promote water permeation from the inner layer to the outer layer.
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93.发明申请公开(公告)号：US20190051332A1
公开(公告)日：2019-02-14
申请号：US15675876
申请日：2017-08-14
Applicant: Seagate Technology LLC
Inventor： Lihong Zhang , Xiong Liu , Aravind Pitty
IPC: G11B33/14
CPC classification number: G11B33/142 , G11B25/043 , G11B33/1406 , G11B33/1446 , G11B33/1466 , H05K5/06
Abstract: The present disclosure relates to a data storage device housing component (and related data storage devices) that include a polymeric element attached to a surface thereof. The polymeric element includes a polymeric matrix and a plurality of nanofiller elements dispersed within the polymeric matrix to increase the thermal conductivity of the polymeric element as compared to a polymeric element that does not include the plurality of nanofiller elements. Also disclosed are related methods.
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公开(公告)号：US10068600B2
公开(公告)日：2018-09-04
申请号：US15727399
申请日：2017-10-06
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Mingzhong Ding , Xiong Liu , Xiang Lu , Qiang Bi , Kian Keong Ooi
IPC: G11B5/596
Abstract: Systems and methods for compensating for magnetoresistive (MR) jog offset direct current (DC) drift in a disc drive are described. In one embodiment, a method may include determining an occurrence of NOS, for example, by monitoring disc slip, to determine when the method should proceed. An MR jog offset DC drift amount is determined for each head of the disc drive. One of several approaches may be employed for determining the MR jog offset DC drift amount. By determining an MR jog offset DC drift amount for each head, a compensation profile is determined for the drive. The determined compensation profile may then be used during operation of the disc drive to compensate for the DC drift. One of several approaches may be employed for compensating based on the compensation profile.
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公开(公告)号：US09972353B1
公开(公告)日：2018-05-15
申请号：US15589795
申请日：2017-05-08
Applicant: Seagate Technology LLC
Inventor： Jian Qiang , Xiong Liu
CPC classification number: G11B20/1217 , G11B20/18 , G11B27/36 , G11B2020/1238 , G11B2220/2516
Abstract: The disclosed technology provides a method that improves SMR throughput in vibration in storage systems. In one implementation, the method comprises receiving a write command to write data on a first track in a band of a storage medium, performing a vibration detection scheme to identify vibration events, determining if a number of vibration events is above a predetermined threshold, skipping the first track responsive to determining the number of vibration events is above a predetermined threshold, seeking to a second track adjacent to the first track, increasing an OCLIM on the second track adjacent to the first track from a default OCLIM to an increased OCLIM, and shifting the writer center on the second track adjacent to the first track.
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Patent Agency Ranking
公开(公告)号：US09892749B2
公开(公告)日：2018-02-13
申请号：US15373891
申请日：2016-12-09
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Jian Qiang , Xiong Liu
CPC classification number: G11B5/56 , G11B5/012 , G11B5/5526 , G11B20/10009 , G11B20/1217 , G11B2020/1238 , G11B2020/1292
Abstract: Methods, systems, and apparatuses are described for provisioning storage devices. An example method includes determining a write status of an adjacent track that is adjacent to a target track of a shingled magnetic recording (SMR) disk drive. The method may further include determining an offset for a write head based on the write status of the adjacent track and positioning the write head according to the offset.
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公开(公告)号：US09881642B2
公开(公告)日：2018-01-30
申请号：US14674357
申请日：2015-03-31
Applicant: Seagate Technology LLC
Inventor： Lihong Zhang , Samuel Gan , Xiong Liu
CPC classification number: G11B19/048 , G01N25/72 , G11B5/6052 , G11B5/607 , G11B5/6076 , G11B19/04
Abstract: The present application provides a transducer head comprising a laser source configured to heat a target storage medium surface, and a thermal sensor configured to detect a defect on the target storage medium surface. The present application also provides a method comprising heating a target storage medium surface with an energy source configured in a transducer head to irradiate the target storage medium surface, and detecting a defect on the target storage medium surface using a thermal sensor configured in the transducer head. Other implementations are also described and recited herein.
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公开(公告)号：US09846569B1
公开(公告)日：2017-12-19
申请号：US14543634
申请日：2014-11-17
Applicant: Seagate Technology LLC
Inventor： Xiong Liu , Quan Li , Yew Meng Tan , WenXiang Xie
IPC: G06F7/58
CPC classification number: G06F7/588
Abstract: Systems and methods of generating random values based on random components of the noise are presented. A signal having at least a noise component(s) can be received and one or more random values can be calculated from the noise component(s). In some examples, noise can be received from a random source and common mode portions of the data can be filtered. A data channel can then process the noise to produce random data, which can be further processed by security circuits to generate random values, seed values, random numbers, and other values.
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公开(公告)号：US20170236534A1
公开(公告)日：2017-08-17
申请号：US15043801
申请日：2016-02-15
Applicant: Seagate Technology LLC
Inventor： Xiong Liu , Michael R. Montemorra , Ralph W. Cross , Todd M. Lammers , Quan Li , Beng Theam Ko , Kirill Rivkin , Mourad Benakli
CPC classification number: G11B5/09 , G11B5/012 , G11B20/10027 , G11B20/1217 , G11B20/1426
Abstract: Method and apparatus for enhancing write current switching efficiencies during data write operations in a data storage device. In some embodiments, write data are described in the form a sequence of symbols of nT length where T is a channel clock rate and n is an integer over a selected range. Bi-directional write currents are applied to a write element to record the sequence of symbols to a storage medium. The write currents are switched between a first rail current and a second rail current for alternating symbols. The write currents are further transitioned to an intermediate current value for at least one channel clock period immediately preceding a next occurrence of a symbol boundary between an adjacent pair of symbols in the sequence.
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公开(公告)号：US09542965B2
公开(公告)日：2017-01-10
申请号：US14677055
申请日：2015-04-02
Applicant: Seagate Technology LLC
Inventor： Xiong Liu , Lihong Zhang
CPC classification number: G11B5/56 , G11B5/5539 , G11B20/1217 , G11B2020/1238 , G11B2020/1292
Abstract: A data storage device may be configured with at least a transducing head separated from a data storage medium. The transducing head can have a data reader and data writer. A plurality of data bits may be arranged in first and second shingled data tracks on the data storage medium. The data writer can be configured with a writer centerline aligned with a track centerline of the first shingled data track and a data reader having a reader centerline skewed with respect to the track and writer centerlines.
Abstract translation: 数据存储装置可以配置有至少与数据存储介质分离的换能头。 转换头可以具有数据读取器和数据写入器。 可以在数据存储介质上的第一和第二带状数据轨道中布置多个数据位。 数据写入器可以配置有与第一带状数据轨道的轨道中心线对准的写入器中心线和具有相对于轨道和写入器中心线倾斜的读取器中心线的数据读取器。
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