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1.发明申请公开(公告)号：US20060114587A1
公开(公告)日：2006-06-01
申请号：US11000105
申请日：2004-11-30
申请人： Indukumar Kalahasthi , Quan-chiu Lam , Guo Mian , Kris Schouterden , Joseph Silva , Christopher Wiederholt , Douglas Zuercher
发明人： Indukumar Kalahasthi , Quan-chiu Lam , Guo Mian , Kris Schouterden , Joseph Silva , Christopher Wiederholt , Douglas Zuercher
IPC分类号： G11B5/09
CPC分类号： G11B5/3136 , G11B20/10194 , G11B2005/0018
摘要： A method is presented for writing data to a surface of a magnetic disk in a disk drive. The method includes determining a number of sector groups into which sectors of the data to be written will be grouped, loading registers with current values, kick-latching values, and precompensation values for each of said sector groups, and applying the current values, kick-latching values, and precompensation values for each of the sector groups to the write head while writing data to the sector groups of the recording media.
摘要翻译： 提出了一种将数据写入磁盘驱动器中的磁盘表面的方法。 该方法包括确定要写入的数据的扇区将被分组的扇区组的数量，为当前值加载寄存器，每个所述扇区组的启动锁定值和预补偿值，并应用当前值，踢 在将数据写入记录介质的扇区组时，将每个扇区组的补码值和预补偿值写入写入头。
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公开(公告)号：US20110116186A1
公开(公告)日：2011-05-19
申请号：US12622109
申请日：2009-11-19
IPC分类号： G11B21/02
CPC分类号： G11B20/1217 , G11B2005/0005 , G11B2020/1292 , G11B2020/1298 , G11B2220/2516
摘要： Approaches for adjusting the recording density of a recording medium in a circumferential direction are disclosed. A hard-disk drive includes one or more electronic components configured to divide a track, of a plurality of concentric tracks on a magnetic-recording disk, into a plurality of portions, and write data to each of the plurality of portions at a recording density that is independent of the recording density used for any of the other portions. Data may be written to a first portion of a track at a different frequency than to a second portion of the same track. The frequency at which data is written may be adjusted for different portions of the same track to allow the frequency to be reduced at certain portions shown to have relatively higher soft error rate while increasing the frequency for other portions to achieve a desired average error rate for the track.
摘要翻译： 公开了用于调节记录介质在圆周方向上的记录密度的方法。 硬盘驱动器包括一个或多个电子部件，其被配置为将磁记录盘上的多个同心轨道的轨迹分成多个部分，并且以记录密度将数据写入多个部分中的每一个部分 其独立于用于任何其它部分的记录密度。 数据可以以与相同轨道的第二部分不同的频率写入轨道的第一部分。 可以针对同一轨道的不同部分调整写入数据的频率，以允许在显示为具有相对较高的软错误率的某些部分减小频率，同时增加其他部分的频率以实现期望的平均误码率 轨道。
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公开(公告)号：US09047921B2
公开(公告)日：2015-06-02
申请号：US12622109
申请日：2009-11-19
CPC分类号： G11B20/1217 , G11B2005/0005 , G11B2020/1292 , G11B2020/1298 , G11B2220/2516
摘要： Approaches for adjusting the recording density of a recording medium in a circumferential direction are disclosed. A hard-disk drive includes one or more electronic components configured to divide a track, of a plurality of concentric tracks on a magnetic-recording disk, into a plurality of portions, and write data to each of the plurality of portions at a recording density that is independent of the recording density used for any of the other portions. Data may be written to a first portion of a track at a different frequency than to a second portion of the same track. The frequency at which data is written may be adjusted for different portions of the same track to allow the frequency to be reduced at certain portions shown to have relatively higher soft error rate while increasing the frequency for other portions to achieve a desired average error rate for the track.
摘要翻译： 公开了用于调节记录介质在圆周方向上的记录密度的方法。 硬盘驱动器包括一个或多个电子部件，其被配置为将磁记录盘上的多个同心轨道的轨迹分成多个部分，并且以记录密度将数据写入多个部分中的每一个部分 其独立于用于任何其它部分的记录密度。 数据可以以与相同轨道的第二部分不同的频率写入轨道的第一部分。 可以针对同一轨道的不同部分调整写入数据的频率，以允许在显示为具有相对较高的软错误率的某些部分减小频率，同时增加其他部分的频率以实现期望的平均误码率 轨道。
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公开(公告)号：US08068306B2
公开(公告)日：2011-11-29
申请号：US12637408
申请日：2009-12-14
CPC分类号： G11B5/6064 , G11B5/6005
摘要： Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.
摘要翻译： 提高硬盘驱动器（HDD）头部经历暂时飞高问题的写入质量的方法。 当硬盘驱动器空闲并且头部停放在斜坡上时，流体（例如润滑剂或蒸气冷凝）可以在盘片的表面与头部或滑块之间收集，从而导致头部暂时飞行 高于正常 HDD可以包括被配置为（a）确定在磁记录盘的表面和滑块或头之间是否存在流体的电子部件，以及（b）暂时调整一个或多个 i）头部的热飞行高度控制设置和（ii）头部的写入参数，以补偿头部飞行高于正常，这是因为流体插入在盘的表面和滑块或头部之间 。
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公开(公告)号：US20110141607A1
公开(公告)日：2011-06-16
申请号：US12637408
申请日：2009-12-14
IPC分类号： G11B21/02
CPC分类号： G11B5/6064 , G11B5/6005
摘要： Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.
摘要翻译： 提高硬盘驱动器（HDD）头部经历暂时飞高问题的写入质量的方法。 当硬盘驱动器空闲并且头部停放在斜坡上时，流体（例如润滑剂或蒸气冷凝）可以在盘片的表面与头部或滑块之间收集，从而导致头部暂时飞行 高于正常 HDD可以包括被配置为（a）确定在磁记录盘的表面和滑块或头之间是否存在流体的电子部件，以及（b）暂时调整一个或多个 i）头部的热飞行高度控制设置和（ii）头部的写入参数，以补偿头部飞行高于正常，这是因为流体插入在盘的表面和滑块或头部之间 。
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