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1.发明授权公开(公告)号：US09536559B1
公开(公告)日：2017-01-03
申请号：US14928717
申请日：2015-10-30
Applicant: Seagate Technology LLC
Inventor： Michael A. Cordle , Tim Rausch , Franklin P. Martens
CPC classification number: G11B5/09 , G11B5/012 , G11B5/455 , G11B7/1263 , G11B20/10009 , G11B20/10305 , G11B20/10481 , G11B20/1816 , G11B2005/0021
Abstract: A laser power applied to a recording head is changed for a plurality of iterations. Each iteration involves, via the recording head at each laser power, writing multiple adjacent tracks to a heat-assisted recording medium and determining a bit error rate for at least one of the adjacent tracks at each laser power. A first laser power is found that achieves a minimum bit error rate of the iterations. An operational value of laser power that is smaller than the first laser power is used during operational recording to reduce adjacent track interference.
Abstract translation: 施加到记录头的激光功率被改变多次迭代。 每次迭代涉及通过每个激光功率下的记录头将多个相邻的轨道写入热辅助记录介质，并且确定每个激光功率下至少一个相邻轨道的误码率。 发现第一激光功率达到迭代的最小误码率。 在操作记录期间使用小于第一激光功率的激光功率的操作值以减少相邻的磁道干扰。
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公开(公告)号：US09478248B2
公开(公告)日：2016-10-25
申请号：US14512590
申请日：2014-10-13
Applicant: Seagate Technology LLC
Inventor： Michael A. Cordle , Franklin P. Martens , Alfredo Sam Chu , Shawn Stephen Silewski , Tim Rausch
CPC classification number: G11B20/10388 , G06F11/073 , G06F11/076 , G11B5/02 , G11B5/1278 , G11B5/40 , G11B5/455 , G11B5/5534 , G11B5/6088 , G11B19/048 , G11B20/1816 , G11B20/182 , G11B2005/0021
Abstract: A data storage device and associated methods may provide at least a data storage medium that is separated from a heat assisted magnetic recording data writer and is connected to a controller. The controller can be configured to change a laser power of the heat assisted magnetic recording data writer in response to a tested bit error rate of a median data track of a plurality of adjacent data tracks reaching an identified threshold.
Abstract translation: 数据存储装置和相关联的方法可以提供至少一个与热辅助磁记录数据写入器分离并连接到控制器的数据存储介质。 控制器可以被配置为响应于达到所识别的阈值的多个相邻数据轨道的中值数据轨迹的测试误码率来改变热辅助磁记录数据写入器的激光功率。
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Patent Agency Ranking
3.发明授权Laser adjustment during field operation of a heat-assisted magnetic recording data storage device 有权热辅助磁记录数据存储装置的现场操作时的激光调整公开(公告)号：US09311951B1
公开(公告)日：2016-04-12
申请号：US14864202
申请日：2015-09-24
Applicant: Seagate Technology LLC
Inventor： Alfredo Sam Chu , Drew Michael Mader , Wenzhong Zhu , Michael A. Cordle
IPC: G11B7/1263 , G11B20/18 , G11B5/02 , G11B7/1267 , G11B5/00 , G11B5/455 , G11B5/012
CPC classification number: G11B7/1267 , G11B5/012 , G11B5/02 , G11B5/455 , G11B5/5534 , G11B13/08 , G11B20/10009 , G11B20/10481 , G11B20/10509 , G11B20/182 , G11B2005/0021
Abstract: During field operation of a heat-assisted magnetic recording data storage device, a laser adjustment procedure is repeatedly performed. The laser adjustment procedure involves writing, at a designated location on a recording medium at least three tracks at an unsqueezed pitch, a first track being in the middle of the at least three tracks. A first bit error rate of the first track is compared with a reference bit error rate. In response to the comparison satisfying a threshold, the laser current is swept while recording squeezed test tracks at the designated location to determine a new laser current that results in a minimum bit error rate. The new laser current is used for subsequent write operations.
Abstract translation: 在热辅助磁记录数据存储装置的现场操作期间，重复执行激光调节程序。 激光调整程序涉及在非压缩间距的至少三个轨道上在记录介质上的指定位置处写入至少三个轨道中间的第一轨道。 将第一轨道的第一误码率与参考误码率进行比较。 响应于满足阈值的比较，激光电流被扫描，同时在指定位置记录挤压的测试轨迹，以确定导致最小误码率的新的激光电流。 新的激光电流用于后续写入操作。
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公开(公告)号：US20160055881A1
公开(公告)日：2016-02-25
申请号：US14512590
申请日：2014-10-13
Applicant: Seagate Technology LLC
Inventor： Michael A. Cordle , Franklin P. Martens , Alfredo Sam Chu , Shawn Stephen Silewski , Tim Rausch
CPC classification number: G11B20/10388 , G06F11/073 , G06F11/076 , G11B5/02 , G11B5/1278 , G11B5/40 , G11B5/455 , G11B5/5534 , G11B5/6088 , G11B19/048 , G11B20/1816 , G11B20/182 , G11B2005/0021
Abstract: A data storage device and associated methods may provide at least a data storage medium that is separated from a heat assisted magnetic recording data writer and is connected to a controller. The controller can be configured to change a laser power of the heat assisted magnetic recording data writer in response to a tested bit error rate of a median data track of a plurality of adjacent data tracks reaching an identified threshold.
Abstract translation: 数据存储装置和相关联的方法可以提供至少一个与热辅助磁记录数据写入器分离并连接到控制器的数据存储介质。 控制器可以被配置为响应于达到确定的阈值的多个相邻数据轨道的中值数据轨迹的测试误码率来改变热辅助磁记录数据写入器的激光功率。
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5.发明申请公开(公告)号：US20170092318A1
公开(公告)日：2017-03-30
申请号：US15095380
申请日：2016-04-11
Applicant: Seagate Technology LLC
Inventor： Alfredo Sam Chu , Drew Michael Mader , Wenzhong Zhu , Michael A. Cordle
IPC: G11B7/1267 , G11B20/18
CPC classification number: G11B7/1267 , G11B5/012 , G11B5/02 , G11B5/455 , G11B5/5534 , G11B13/08 , G11B20/10009 , G11B20/10481 , G11B20/10509 , G11B20/182 , G11B2005/0021
Abstract: During field operation of a heat-assisted magnetic recording data storage device, a laser adjustment procedure is performed. The laser adjustment procedure involves writing on a recording medium at least three tracks. If a bit error rate of a middle tracks has increased, the laser current is swept while recording test tracks to determine a new laser current that results in a minimum bit error rate. The new laser current is used for subsequent write operations.
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6.发明授权Laser adjustment during field operation of a heat-assisted magnetic recording data storage device 有权热辅助磁记录数据存储装置的现场操作时的激光调整公开(公告)号：US09589587B1
公开(公告)日：2017-03-07
申请号：US15095380
申请日：2016-04-11
Applicant: Seagate Technology LLC
Inventor： Alfredo Sam Chu , Drew Michael Mader , Wenzhong Zhu , Michael A. Cordle
CPC classification number: G11B7/1267 , G11B5/012 , G11B5/02 , G11B5/455 , G11B5/5534 , G11B13/08 , G11B20/10009 , G11B20/10481 , G11B20/10509 , G11B20/182 , G11B2005/0021
Abstract: During field operation of a heat-assisted magnetic recording data storage device, a laser adjustment procedure is performed. The laser adjustment procedure involves writing on a recording medium at least three tracks. If a bit error rate of a middle tracks has increased, the laser current is swept while recording test tracks to determine a new laser current that results in a minimum bit error rate. The new laser current is used for subsequent write operations.
Abstract translation: 在热辅助磁记录数据存储装置的现场操作期间，执行激光调节程序。 激光调节过程包括在记录介质上写入至少三个轨道。 如果中间轨道的误码率增加，则在记录测试轨迹以确定导致最小误码率的新激光电流时激光电流被扫描。 新的激光电流用于后续写入操作。
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7.发明授权Procedure that achieves a target areal density for a heat-assisted recording medium 有权实现热辅助记录介质的目标区域密度的步骤公开(公告)号：US09330688B1
公开(公告)日：2016-05-03
申请号：US14666557
申请日：2015-03-24
Applicant: Seagate Technology LLC
Inventor： Wenzhong Zhu , Kaizhong Gao , Michael A. Cordle
CPC classification number: G11B5/09 , G11B5/012 , G11B20/10009 , G11B20/10305 , G11B20/10388 , G11B20/10481 , G11B20/105 , G11B20/10509 , G11B2005/0021 , G11B2020/1292 , G11B2020/1298
Abstract: A recording head writes data to a recording medium for one or more iterations. Each iteration involves adjusting a linear data density, a track pitch, and a laser power. From the iterations, a selected linear data density, a selected track pitch, and a selected laser power are determined that together achieve a target areal density and are used to write user data to the recording medium during operation of a hard disk drive.
Abstract translation: 记录头将数据写入记录介质进行一次或多次迭代。 每次迭代涉及调整线性数据密度，轨道间距和激光功率。 从迭代中，确定所选择的线性数据密度，所选择的轨道间距和所选择的激光功率，其一起达到目标区域密度，并且用于在硬盘驱动器的操作期间将用户数据写入记录介质。
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