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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：US10388314B1
公开(公告)日：2019-08-20
申请号：US15951518
申请日：2018-04-12
Applicant: Seagate Technology LLC
Inventor： Xiong Liu , Lan Xia , Quan Li , Lihong Zhang , Swee Chuan Samuel Gan
Abstract: Apparatus and method for reducing the effects of thermal asperities on a rotatable data recording surface. A data transducer writes user data to a first set of tracks at a first fly height above the recording surface. A compensation circuit detects a thermal asperity (TA) on the recording surface, and establishes a guard band as a second set of tracks that are co-radial with the TA. The second set of tracks are deallocated and removed from service. The compensation circuit further defines a reserve band as a third set of tracks immediately adjacent the guard band, and selects an increased, second fly height that allows the data transducer to write data to the reserve band without contacting the TA. The second set of tracks may have a greater track pitch than the first set of tracks to compensate for the greater fly height.
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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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