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公开(公告)号：US09495987B1
公开(公告)日：2016-11-15
申请号：US14701914
申请日：2015-05-01
Applicant: Seagate Technology LLC
Inventor： Ben Niu , Lan Xia , Fong Kheon Chong , Quek Leong Choo , Song Wee Teo
CPC classification number: G11B5/59627 , G11B5/09 , G11B5/59688 , G11B20/1037 , G11B20/182 , G11B2020/1238 , G11B2220/2508
Abstract: The disclosed technology provides techniques for mitigating write-to-write bit error rate fluctuations that decrease accuracy of write precompensation (WPC) tuning. According to one implementation, such write-to-write bit error rate fluctuations are mitigated if a predetermined pattern is written at a particular radial offset from a target data track prior to testing a WPC register in association with the target data track. Selection of the particular radial offset can be performed according to an iterative offset track clean-up disclosed herein.
Abstract translation: 所公开的技术提供了减轻写入 - 写入误码率波动的技术，这降低了写入预补偿（WPC）调整的精度。 根据一个实现方式，如果在与目标数据轨道相关联地测试WPC寄存器之前在与目标数据轨道的特定径向偏移上写入预定模式，则可以减轻这种写入到写入误码率波动。 可以根据本文公开的迭代偏移轨道清理来执行特定径向偏移的选择。
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Patent Agency Ranking
公开(公告)号：US20160322074A1
公开(公告)日：2016-11-03
申请号：US14701914
申请日：2015-05-01
Applicant: Seagate Technology LLC
Inventor： Ben Niu , Lan Xia , Fong Kheon Chong , Quek Leong Choo , Song Wee Teo
CPC classification number: G11B5/59627 , G11B5/09 , G11B5/59688 , G11B20/1037 , G11B20/182 , G11B2020/1238 , G11B2220/2508
Abstract: The disclosed technology provides techniques for mitigating write-to-write bit error rate fluctuations that decrease accuracy of write precompensation (WPC) tuning According to one implementation, such write-to-write bit error rate fluctuations are mitigated if a predetermined pattern is written at a particular radial offset from a target data track prior to testing a WPC register in association with the target data track. Selection of the particular radial offset can be performed according to an iterative offset track clean-up disclosed herein.
Abstract translation: 所公开的技术提供了用于减轻写入 - 写入误码率波动以降低写入预补偿（WPC）调整精度的技术。根据一个实现方式，如果将预定模式写入，这种写入到写入误码率波动将被缓解 在与目标数据轨道相关联地测试WPC寄存器之前，与目标数据轨道的特定径向偏移。 可以根据本文公开的迭代偏移轨道清理来执行特定径向偏移的选择。
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公开(公告)号：US11380356B2
公开(公告)日：2022-07-05
申请号：US17218810
申请日：2021-03-31
Applicant: Seagate Technology LLC
Inventor： Phan Linh Nguyen , Chi Sern Georgie Tan , Qiang Bi , Joshua W. Christensen , Song Wee Teo , Wei Chen Lau , Heather Lee Mallett , Renee Depew , David Allan Thorsvik , Tze Pin Chin , Jose Mari Toribio
Abstract: The technology disclosed herein provides a method for generating an on-cylinder limit (OCLIM), the method including performing servo certification of a plurality of drives in a storage device to generate servo adaptive parameters (SAPs) by heads, generating a plurality of read adjust parameters (RAPs) by heads for the plurality of drives, generating an interim OCLIM value based on the SAPs by heads and RAPs by zones, and operating a disc drive write element using the interim OCLIM value.
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公开(公告)号：US10290319B1
公开(公告)日：2019-05-14
申请号：US16058819
申请日：2018-08-08
Applicant: Seagate Technology LLC
Inventor： Antonia Tsoukatos , Tim Rausch , Mehmet Fatih Erden , Benjamin W Parish , Prasanna Manja Ramakrishna , Morovat Bryan Tayefeh , Sai Sian Hon , ChengYi Guo , Teck Khoon Lim , Song Wee Teo
Abstract: A method for performing a flaw scan test on a hard disk drive is disclosed. The hard disk drive includes a magnetic recording medium and spindle motor associated with a predetermined rated speed. The method includes writing a test pattern to the magnetic recording medium while operating the spindle motor at a speed greater than the predetermined rated speed. The method also includes reading the test pattern at the greater speed and detecting flaws in response to reading the test pattern.
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公开(公告)号：US10997996B1
公开(公告)日：2021-05-04
申请号：US16916786
申请日：2020-06-30
Applicant: Seagate Technology LLC
Inventor： Phan Linh Nguyen , Chi Sern Georgie Tan , Qiang Bi , Joshua W. Christensen , Song Wee Teo , Wei Chen Lau , Heather Lee Mallett , Renee Depew , David Allan Thorsvik , Tze Pin Chin , Jose Mari Toribio
Abstract: The technology disclosed herein provides a method for generating an on-cylinder limit (OCLIM), the method including performing servo certification of a plurality of drives in a storage device to generate servo adaptive parameters (SAPs) by heads, generating a plurality of read adjust parameters (RAPs) by heads for the plurality of drives, generating an interim OCLIM value based on the SAPs by heads and RAPs by zones, and operating a disc drive write element using the interim OCLIM value.
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公开(公告)号：US09607633B1
公开(公告)日：2017-03-28
申请号：US15091945
申请日：2016-04-06
Applicant: Seagate Technology LLC
Inventor： Jose Mari Corral Toribio , Song Wee Teo , Teck Khoon Lim
CPC classification number: G11B20/182 , G11B5/012 , G11B20/1217 , G11B2020/1238 , G11B2020/1242 , G11B2020/1292
Abstract: Method and apparatus for positioning shingled magnetic recording (SMR) tracks on a rotatable data storage medium. In some embodiments, a first band of partially overlapping tracks is written the medium at a first track pitch. An adjacent, second band of partially overlapping tracks is written to the medium at the first track pitch. The second band has a first written track at a second track pitch with respect to a last written track in the first band. The second track pitch is determined in response to an error rate established for a test track using an adjacent track written at the first track pitch.
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