CN102956242B - 磁盘驱动器以及对磁盘驱动器进行伺服写入的方法 - Google Patents
磁盘驱动器以及对磁盘驱动器进行伺服写入的方法 Download PDFInfo
- Publication number
- CN102956242B CN102956242B CN201210279229.4A CN201210279229A CN102956242B CN 102956242 B CN102956242 B CN 102956242B CN 201210279229 A CN201210279229 A CN 201210279229A CN 102956242 B CN102956242 B CN 102956242B
- Authority
- CN
- China
- Prior art keywords
- disk surface
- magnetic disk
- spiral track
- rro
- magnetic head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59627—Aligning for runout, eccentricity or offset compensation
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59633—Servo formatting
- G11B5/59661—Spiral servo format
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59633—Servo formatting
- G11B5/59666—Self servo writing
Abstract
本发明涉及磁盘驱动器以及对磁盘驱动器进行伺服写入的方法。本发明公开一种对磁盘驱动器进行伺服写入的方法，磁盘驱动器包括在第一磁盘表面上方致动的第一磁头和在第二磁盘表面上方致动的第二磁头。测量第一磁盘表面的第一可重复偏摆（RRO），响应于所测得的第一RRO执行寻道，使第一磁头在第一磁盘表面上方寻道的同时，使用第二磁头将第一螺旋磁道写到第二磁盘表面。因此，第一螺旋磁道包括与第一磁盘表面的第一RRO基本匹配的第二RRO。
Description
技术领域
背景技术
当制造磁盘驱动器时，同心伺服扇区20-2N被写到磁盘4，该磁盘4按如图1所示现有技术磁盘格式定义多个径向间隔的同心数据磁道6。每个数据磁道6被分割成多个数据扇区，其中同心伺服扇区20-2N被认为是“嵌入”在数据扇区中。每个伺服扇区（例如，伺服扇区24）包括用于同步增益控制和时序恢复的前导码8，用于同步到包括粗略磁头定位信息（例如磁道号）的数据字段12的同步标记10，以及提供精细磁头定位信息的伺服脉冲14。在寻道操作期间处理粗略磁头定位信息，以将磁头定位在目标磁道上方，并且在跟踪操作期间处理伺服脉冲14，以将磁头保持在目标磁道的中心线上方的同时读或写数据。
过去，在制造期间，已经使用外部伺服写入器（servowriter）将同心伺服扇区20-2N写到磁盘表面。外部伺服写入器采用极其精确的磁头定位机构（例如激光干涉仪）来确保将同心伺服扇区20-2N从磁盘外直径到磁盘内直径写在合适的径向位置。然而，外部伺服写入器很昂贵，而且需要洁净室内环境，以便磁头定位销（pin）能够被插入到磁头磁盘组件（HDA）内而不污染磁盘。因此，外部伺服写入器已经成为磁盘驱动器制造过程中的昂贵瓶颈。
现有技术已经提议各种“自伺服”写入方法，其中使用磁盘驱动器的内部电子器件独立于外部伺服写入器进行同心伺服扇区的写入。例如，美国专利No.5,668,679教导了一种磁盘驱动器，其通过以下步骤执行自伺服写入操作：将多个螺旋伺服磁道写到磁盘，接着处理该多个螺旋伺服磁道，以沿着环形路径对同心伺服扇区进行写入。每个螺旋磁道如高频信号（具有丢失的比特）一样被写到磁盘，其中相对于检测到的螺旋伺服磁道位置中的时间偏移生成用于跟踪的方位误差信号（PES）。对读信号进行整流并且低通滤波，以生成代表螺旋磁道交叉的三角包络信号，其中，通过检测三角包络信号相对于同步到磁盘旋转的时钟的峰值，来检测螺旋伺服磁道的位置。
发明内容
附图说明
图1示出包括由伺服扇区定义的多个伺服磁道的现有技术磁盘格式。
图2A是根据本发明实施例的流程图，其中针对第一磁盘表面测量可重复偏摆（RRO），并且使用该RRO来将螺旋磁道写在第二磁盘表面上。
图2B和2C示出根据本发明实施例的当在第一磁盘表面上伺服时，将针对第一磁盘表面所测量的RRO映射到写到第二磁盘表面的螺旋磁道。
图3A示出本发明的实施例，其中第一磁盘表面包括同心伺服扇区，其用于在第一磁盘表面上方伺服第一磁头的同时将多个螺旋磁道写到第二磁盘表面。
图3B示出根据本发明实施例的当在第一磁盘表面上伺服时被写到第二磁盘表面的多个螺旋磁道。
图3C示出本发明的实施例，其中当在第二磁盘表面上的螺旋磁道上伺服时，将同心伺服扇区写到第二磁盘表面。
图4A-4D示出本发明的实施例，其中将多个螺旋磁道写在第一磁盘表面上，并且接着将螺旋磁道写到第二磁盘表面，该第一磁盘表面是通过在螺旋磁道上伺服来写有同心伺服扇区的。
图5A示出根据本发明实施例的控制电路，其用于在第一磁盘表面上方伺服第一磁头的同时将螺旋磁道写到第二磁盘表面。
图5B示出根据本发明实施例的速度分布，其用于将螺旋磁道写到第二磁盘表面。
图6是根据本发明实施例的流程图，其中将前馈RRO补偿值存储在存储器中，并且接着在将螺旋磁道写到第二磁盘表面的同时，将前馈RRO补偿值施加于伺服系统。
图7A和7B示出本发明的实施例，其中在写有螺旋磁道的每个磁盘表面上的索引螺旋磁道中写入接缝（seam）。
图7C示出本发明的实施例，其中索引螺旋磁道中的该接缝用于当通过在螺旋磁道上伺服而伺服写入同心伺服扇区时，在径向上和环向上对齐磁盘表面。
具体实施方式
图2A示出根据本发明实施例的对磁盘驱动器进行伺服写入的方法，其中磁盘驱动器包括在第一磁盘表面上方致动的第一磁头，以及在第二磁盘表面上方致动的第二磁头。测量第一磁盘表面的第一可重复偏摆（RRO）（步骤16），并且响应于所测得的第一RRO执行寻道，以使第一磁头在第一磁盘表面上方寻道（步骤18），同时使用第二磁头将第一螺旋磁道写到第二磁盘表面（步骤20），其中第一螺旋磁道包括由同步标记中断的高频信号，并且第一螺旋磁道包括与第一磁盘表面的第一RRO基本匹配的第二RRO。
图2B将针对第一磁盘表面24A所测得的第一RRO22A示为包括正弦波，其周期等于磁盘的一个循环（1REV）。RRO通常由磁盘相对于使磁盘旋转的主轴电机轮毂中心非中心对齐而引起的。当多个磁盘被夹持（clamp）到主轴电机时，每个磁盘中心可能与主轴电机轮毂中心是不同的非中心对齐。在一个实施例中，在第一磁盘表面上伺服的同时，将多个螺旋磁道写到第二磁盘表面，其中螺旋磁道用于将同心伺服扇区伺服写在第二磁盘表面上。为了使第一表面和第二表面两者的同心伺服扇区对齐，图2B中示出的第一磁盘表面24A的第一RRO22A用于将第一螺旋磁道280写到图2C中示出的第二磁盘表面24B。因此，第一螺旋磁道280包括与第一磁盘表面24A的第一RRO22A基本匹配的第二RRO22B，即使第二磁盘表面的RRO可能与第一磁盘表面的RRO不同。
在图3A示出的实施例中，使用介质写入器将多个同心伺服扇区260-26N写到第一磁盘的第一磁盘表面24A。接着，第一磁盘和至少另一个空白磁盘被夹持到磁盘驱动器的主轴电机轮毂，其中每个磁盘基于与主轴电机轮毂的非中心对齐而可能展现出不同的RRO。在磁盘驱动器内的控制电路通过读取同心伺服扇区260-26N来使第一磁头伺服在第一磁盘表面24A上方，并且通过以下步骤来测量第一磁盘表面22A的第一RRO：测量用于响应于伺服扇区260-26N而伺服磁头的方位误差信号（PES）中的正弦扰动的幅度和相位。在下面描述的实施例中，通过调整正弦前馈补偿的幅度和相位直到PES下降到阀值以下，以此来获知第一RRO。得到的正弦前馈补偿代表第一磁盘表面的第一RRO。
在测量第一磁盘表面的第一RRO后，控制电路使用正弦前馈补偿使第一磁头以基本恒定速度在第一磁盘表面上方寻道，同时使用第二磁头将螺旋磁道28i写到第二磁盘表面24B。控制电路执行多次寻道，以便将多个螺旋磁道280-28N写到第二磁盘表面24B，如图3B所示。在图3B所示的实施例中，每个螺旋磁道28i在部分磁盘循环期间被写入，但是，可以在多个磁盘循环期间被写入，如图2C的实施例中所示。得到的螺旋磁道280-28N将包括与第一磁盘表面的RRO基本匹配的RRO。
在螺旋磁道280-28N被写到第二磁盘表面后，控制电路在螺旋磁道上伺服的同时，将同心伺服扇区300-30N写到第二磁盘表面24B，如图3C所示。由于螺旋磁道280-28N的RRO基本匹配于第一磁盘表面的RRO，因此用于写入螺旋磁道280-28N的同一正弦前馈补偿值可以被用于将同心伺服扇区300-30N写在第二磁盘表面24B上。因此，在第二磁盘表面24B上的同心伺服扇区300-30N将与第一磁盘表面24A上的同心伺服扇区280-28N径向对齐。以此方式，第二磁盘表面24B的伺服磁道（和数据磁道）将与第一磁盘表面24A的伺服磁道（和数据磁道）对齐。
图4A-4D示出本发明的替换实施例，其中使用介质写入器来将多个螺旋磁道写到第一磁盘的第一磁盘表面24A，接着第一磁盘和至少一个空白磁盘一起被夹持到磁盘驱动器主轴电机轮毂上。接着，控制电路伺服在第一磁盘表面24A的螺旋磁道上，以便将多个同心伺服扇区写到第一磁盘表面24A，如图4B所示。接着，响应于写在第一磁盘表面24A上的同心伺服扇区而测量第一磁盘表面24A的第一RRO，并且使用该RRO来将螺旋磁道写到第二磁盘表面24B，如图4C所示。接着，控制电路伺服在第二磁盘表面24B的螺旋磁道上（使用用于将螺旋磁道写在第二磁盘表面24B上的正弦前馈补偿值），以便将多个同心伺服扇区写到第二磁盘表面24B，如图4D所示。
图5A示出根据本发明实施例的磁盘驱动器，其包括在第一磁盘表面24A上方由音圈电机（VCM）34致动的第一磁头32A，该VCM使致动器臂36A围绕枢轴旋转。磁盘驱动器包括控制电路，控制电路包括读/写通道38，读/写通道38用于处理当第一磁头32A读取同心伺服扇区260-26N时从第一磁头32A发出的读信号40。读/写通道38生成估计的方位40，该估计的方位40代表第一磁头32A在第一磁盘表面24A上方的估计的径向位置。从参考方位44（例如，目标径向位置）减去42该估计的方位40，以生成方位误差信号（PES）46。用合适的VCM补偿器48对该PES46进行滤波，以生成控制信号50，该控制信号50用于使第一磁头32A伺服在第一磁盘表面24A上方。
当获知了第一磁盘表面24A的第一RRO时，RRO补偿器52测量PES46中对应的正弦扰动。在一个实施例中，RRO补偿器52调节具有角频率为2πk/N的正弦前馈补偿Aejθ54的幅度A和相位θ，其中k是N个伺服扇区外的当前伺服扇区。该正弦前馈补偿Aejθ54被添加56到控制信号50，以生成施加于VCM34的补偿过的控制信号58。调节正弦前馈补偿Aejθ54的幅度和相位，直到PES基本为0（除了非可重复扰动或更高谐波RRO的影响外）。在一个实施例中，为同心伺服扇区260-26N中的每个生成前馈补偿值，并且可选地，为每个磁道或磁道的分区生成前馈补偿值。
在一个实施例中，控制电路通过使用速度分布使第一磁头32A在第一磁盘表面24A上方寻道，以此将螺旋磁道写到第二磁盘表面24B，图5B示出速度分布的例子。速度分布包括加速段、恒定速度段以及减速段。在图5B实施例中，控制电路在速度分布的恒定速度段期间将螺旋磁道写到第二磁盘表面24B，使得螺旋磁道包括在磁盘半径上基本恒定的斜率。当使第一磁头32A在第一磁盘表面24A上方寻道时，第一磁盘表面24A的RRO是对伺服系统状态（例如，方位、速度等）的扰动。在一个实施例中，图5A中示出的正弦前馈补偿Aejθ54补偿了RRO扰动，使得第一磁头32A以相对于第一磁盘表面24A基本恒定的速度移动，由此以相对于第一磁盘表面24A（即，相对于第一磁盘表面24A的RRO）基本恒定的速度在第二磁盘表面24B上方移动第二磁头32B（图7A）。
图6示出根据本发明实施例的流程图，其中第一磁盘表面24A的RRO相对于第一磁头32A的径向位置改变。因此，在多个径向位置处测量第一磁盘表面的RRO（步骤60），并且将对应的RRO补偿值存储在半导体存储器中（步骤62）。接着，控制电路使用速度分布（例如图5B）使第一磁头在第一磁盘表面上方寻道（步骤64）。当第一磁头到达伺服扇区时（步骤66），从半导体存储器中读出与伺服扇区和磁头径向位置对应的RRO补偿值（步骤68），并且将其用于通过例如以下步骤来调节寻道（步骤70）：将正弦前馈补偿Aejθ添加到VCM控制信号，如上所述。
图7A示出本发明的实施例，其中磁盘驱动器包括多个磁盘表面24A-24D以及在每个磁盘表面上方致动的相应的磁头32A-32D。在一个实施例中，当控制电路使第一磁头32A在第一磁盘表面24A上方寻道的同时，同时将第一螺旋磁道写到第二磁盘表面24B和将第二螺旋磁道写到第三磁盘表面24C（并且可选地，将第三螺旋磁道写到第四磁盘表面24D）。即，可以使用捆绑的（band）写操作将螺旋磁道写到磁盘表面，而在替换实施例中，可以使用分开的写操作将螺旋磁道写到每个磁盘表面。
图7A示出本发明的另一个实施例，其中当第一磁头32A在寻道期间到达目标环向位置和径向位置从而将索引螺旋磁道写到每个磁盘表面（捆绑写入或分开写入）时，在每个磁盘表面上的索引螺旋磁道中写入接缝72B-72D。可以以任何合适的方式写入接缝72B-72D，例如通过在每个索引螺旋磁道中写入间隙（gap）。在图7B示出的实施例中，通过在每个螺旋磁道中切换同步标记来在每个索引螺旋磁道中写入接缝72B-72D。可以通过检测同步标记随着磁头在磁盘上方径向移动时的变化（例如，使用匹配到每个同步标记的相关器）来检测接缝。在图7B的实施例中，当在寻道期间第一磁头32A处于连续的伺服扇区N和N+1之间的中途时，将接缝写入索引螺旋磁道。以此方式，写入接缝的磁道可以被估计为磁道J+K/2，其中磁道J与伺服扇区N对应，磁道J+K与伺服扇区N+1对应，如图7B所示。
图7C示出本发明的实施例，其中在将螺旋磁道（包括包含接缝72B-72D的索引螺旋磁道）写到磁盘表面24B-24D后，通过在螺旋磁道上伺服来将同心伺服扇区写到每个磁盘表面。在将同心伺服扇区写到磁盘表面中的一个之前，定位索引螺旋磁道中的接缝，以便初始化磁头的径向位置和环向位置。接着，写入同心伺服扇区，以便与其他磁盘表面在径向上和环向上对齐。这在图7C中示出，其中在磁盘表面上环向对齐伺服扇区，包括索引伺服扇区SS0。另外，将同心伺服扇区写在每个磁盘表面，使得在第一磁盘表面24A上对应于何时写入接缝72B-72D的磁道74（图7B中的磁道J+K/2）在各磁盘表面上是相同的磁道（即，同心伺服扇区和得到的伺服磁道在磁盘表面上径向对齐）。
在一个实施例中，在各磁盘表面上在径向上和环向上对齐同心伺服扇区提高了访问磁盘表面的性能。例如，对齐同心伺服扇区会使旋转方位优化（RPO）算法能够估计在完成对第一磁盘表面的访问命令后，访问第二磁盘表面上的目标磁道的目标数据扇区所需要的时间。替换地，对齐同心伺服扇区可以通过最小化磁头切换后的延迟来提高当执行跨越多个磁盘表面的访问命令（读或写）时的性能。
可以采用任何合适的控制电路来实现本发明实施例中的流程图，例如任何合适的集成电路。例如，控制电路可以被实现在读通道集成电路内，或者实现在与读通道分开的部件中（例如磁盘控制器），或者上述某些步骤可以由读通道执行，而其他步骤由磁盘控制器执行。在一个实施例中，读通道和磁盘控制器被实现为分开的集成电路，而在一个替换实施例中，他们被制造到单个集成电路或片上系统（SOC）中。另外，控制电路可以包括合适的前置放大电路，其被实现为独立的集成电路、集成到读通道或磁盘控制器电路中或集成到SOC中。
在一个实施例中，控制电路包括执行指令的微处理器，该指令可操作来使微处理器执行本文描述的流程图的各步骤。指令可以被存储在任何计算机可读介质中。在一个实施例中，他们可以被存储在微处理器外部的非易失性半导体存储器中，或者被存储在与微处理器集成在SOC中的非易失性半导体存储器中。在另一个实施例中，指令被存储在磁盘上，并且当磁盘驱动器上电时，指令被读取到非易失性半导体存储器中。在又一个实施例中，控制电路包括合适的逻辑电路，例如状态机器电路。
Claims (16)
1.一种磁盘驱动器，其包括：
第一磁盘表面；
第二磁盘表面；
在所述第一磁盘表面上方致动的第一磁头；
在所述第二磁盘表面上方致动的第二磁头；以及
控制电路，其可操作来：
测量所述第一磁盘表面的第一可重复偏摆，即RRO；以及
响应于所测得的第一RRO使所述第一磁头在所述第一磁盘表面上方寻道的同时，使用所述第二磁头将第一螺旋磁道写到所述第二磁盘表面，其中：
所述第一螺旋磁道包括由同步标记中断的高频信号；以及
所述第一螺旋磁道包括与所述第一磁盘表面的第一RRO基本匹配的第二RRO。
2.根据权利要求1所述的磁盘驱动器，其中：
所述第一磁盘表面包括第一多个同心伺服扇区；以及
所述控制电路可操作来响应于所述同心伺服扇区测量所述第一磁盘表面的第一RRO。
3.根据权利要求2所述的磁盘驱动器，其中所述控制电路进一步可操作来：
响应于在多个径向位置测得的第一RRO，为所述第一多个同心伺服扇区中的每个生成RRO补偿值；
在寻道期间，响应于所述第一多个同心伺服扇区和与当前伺服扇区以及所述第一磁头的径向位置对应的目标RRO补偿值，使所述第一磁头在所述第一磁盘表面上方寻道。
4.根据权利要求3所述的磁盘驱动器，其中所述控制电路进一步可操作来：
将所述RRO补偿值保存在半导体存储器中；以及
在寻道期间，从所述半导体存储器中读取与当前伺服扇区和所述第一磁头的径向位置对应的目标RRO补偿值。
5.根据权利要求2所述的磁盘驱动器，进一步包括第三磁盘表面和在所述第三磁盘表面上方致动的第三磁头，其中所述控制电路进一步可操作来在将所述第一螺旋磁道写到所述第二磁盘表面的同时，使用所述第三磁头同时将第二螺旋磁道写到所述第三磁盘表面。
6.根据权利要求2所述的磁盘驱动器，进一步包括第三磁盘表面和在所述第三磁盘表面上方致动的第三磁头，其中所述控制电路进一步可操作来：
使用所述第三磁头将第二螺旋磁道写到所述第三磁盘表面；以及
在基本相同的径向和环向位置将接缝写入所述第一螺旋磁道和所述第二螺旋磁道中。
7.根据权利要求6所述的磁盘驱动器，其中所述控制电路进一步可操作来：
响应于所述第一螺旋磁道和所述第一螺旋磁道中的接缝，将第二多个同心伺服扇区写到所述第二磁盘表面；以及
响应于所述第二螺旋磁道和所述第二螺旋磁道中的接缝，将第三多个同心伺服扇区写到所述第三磁盘表面；
处理所述第一螺旋磁道和所述第二螺旋磁道中的接缝，使所述第二多个同心伺服扇区与所述第三多个同心伺服扇区在径向上和环向上基本对齐。
8.根据权利要求7所述的磁盘驱动器，其中所述第一多个同心伺服扇区、所述第二多个同心伺服扇区和所述第三多个同心伺服扇区在径向上和环向上基本对齐。
9.一种对磁盘驱动器进行伺服写入的方法，所述磁盘驱动器包括在第一磁盘表面上方致动的第一磁头和在第二磁盘表面上方致动的第二磁头，所述方法包括：
测量所述第一磁盘表面的第一可重复偏摆，即RRO；以及
响应于所测得的第一RRO使所述第一磁头在所述第一磁盘表面上方寻道的同时，使用所述第二磁头将第一螺旋磁道写到所述第二磁盘表面，其中：
所述第一螺旋磁道包括由同步标记中断的高频信号；以及
所述第一螺旋磁道包括与所述第一磁盘表面的第一RRO基本匹配的第二RRO。
10.根据权利要求9所述的方法，其中：
所述第一磁盘表面包括第一多个同心伺服扇区；以及
所述方法进一步包括响应于所述同心伺服扇区测量所述第一磁盘表面的第一RRO。
11.根据权利要求10所述的方法，进一步包括：
响应于在多个径向位置测得的第一RRO，为所述第一多个同心伺服扇区中的每个生成RRO补偿值；
在寻道期间，响应于所述第一多个同心伺服扇区和与当前伺服扇区以及所述第一磁头的径向位置对应的目标RRO补偿值，使所述第一磁头在所述第一磁盘表面上方寻道。
12.根据权利要求11所述的方法，进一步包括：
将所述RRO补偿值保存在半导体存储器中；以及
在寻道期间，从所述半导体存储器中读取与当前伺服扇区和所述第一磁头的径向位置对应的目标RRO补偿值。
13.根据权利要求10所述的方法，其中所述磁盘驱动器进一步包括第三磁盘表面和在所述第三磁盘表面上方致动的第三磁头，所述方法进一步包括在将所述第一螺旋磁道写到所述第二磁盘表面的同时，使用所述第三磁头同时将第二螺旋磁道写到所述第三磁盘表面。
14.根据权利要求10所述的方法，其中所述磁盘驱动器进一步包括第三磁盘表面和在所述第三磁盘表面上方致动的第三磁头，所述方法进一步包括：
使用所述第三磁头将第二螺旋磁道写到所述第三磁盘表面；以及
在基本相同的径向和环向位置将接缝写入所述第一螺旋磁道和所述第二螺旋磁道中。
15.根据权利要求14所述的方法，进一步包括：
响应于所述第一螺旋磁道和所述第一螺旋磁道中的接缝，将第二多个同心伺服扇区写到所述第二磁盘表面；以及
响应于所述第二螺旋磁道和所述第二螺旋磁道中的接缝，将第三多个同心伺服扇区写到所述第三磁盘表面；
处理所述第一螺旋磁道和所述第二螺旋磁道中的接缝，使所述第二多个同心伺服扇区与所述第三多个同心伺服扇区在径向上和环向上基本对齐。
16.根据权利要求15所述的方法，其中所述第一多个同心伺服扇区、所述第二多个同心伺服扇区和所述第三多个同心伺服扇区在径向上和环向上基本对齐。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/207,332 US8537486B2 (en) | 2011-08-10 | 2011-08-10 | Disk drive writing spiral tracks on a slave surface using repeatable runout compensation for a master surface |
| US13/207,332 | 2011-08-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102956242A CN102956242A (zh) | 2013-03-06 |
| CN102956242B true CN102956242B (zh) | 2015-11-18 |
Family
ID=47677393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210279229.4A Expired - Fee Related CN102956242B (zh) | 2011-08-10 | 2012-08-07 | 磁盘驱动器以及对磁盘驱动器进行伺服写入的方法 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US8537486B2 (zh) |
| CN (1) | CN102956242B (zh) |
| HK (1) | HK1179043A1 (zh) |
Families Citing this family (115)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9142235B1 (en) | 2009-10-27 | 2015-09-22 | Western Digital Technologies, Inc. | Disk drive characterizing microactuator by injecting sinusoidal disturbance and evaluating feed-forward compensation values |
| US8743495B1 (en) | 2011-06-03 | 2014-06-03 | Western Digital Technologies, Inc. | Disk drive detecting track squeeze when circular tracks are defined from non-circular servo tracks |
| US8760796B1 (en) | 2011-06-03 | 2014-06-24 | Western Digital Technologies, Inc. | Reducing acoustic noise in a disk drive when exiting idle mode |
| US8687313B2 (en) * | 2011-06-23 | 2014-04-01 | Western Digital Technologies, Inc. | Disk drive mapping out data tracks to avoid thermal asperities |
| US8917474B1 (en) | 2011-08-08 | 2014-12-23 | Western Digital Technologies, Inc. | Disk drive calibrating a velocity profile prior to writing a spiral track |
| US8537486B2 (en) * | 2011-08-10 | 2013-09-17 | Western Digital Technologies, Inc. | Disk drive writing spiral tracks on a slave surface using repeatable runout compensation for a master surface |
| US8737013B2 (en) | 2011-11-16 | 2014-05-27 | Western Digital Technologies, Inc. | Disk drive selecting disturbance signal for feed-forward compensation |
| US9093105B2 (en) | 2011-12-09 | 2015-07-28 | Western Digital Technologies, Inc. | Disk drive charging capacitor using motor supply voltage during power failure |
| US8749904B1 (en) | 2012-02-28 | 2014-06-10 | Western Digital Technologies, Inc. | Disk drive compensating for track squeeze by writing non-circular servo tracks |
| US8824081B1 (en) | 2012-03-13 | 2014-09-02 | Western Digital Technologies, Inc. | Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement |
| US8670206B1 (en) * | 2012-03-27 | 2014-03-11 | Western Digital Technologies, Inc. | Disk drive estimating repeatable runout of reference pattern based on repeatable runout of phase error |
| US8929021B1 (en) | 2012-03-27 | 2015-01-06 | Western Digital Technologies, Inc. | Disk drive servo writing from spiral tracks using radial dependent timing feed-forward compensation |
| US8724253B1 (en) | 2012-03-27 | 2014-05-13 | Western Digital Technologies, Inc. | Disk drive adjusting demodulation window for spiral track using timing feed-forward compensation |
| US8922937B1 (en) | 2012-04-19 | 2014-12-30 | Western Digital Technologies, Inc. | Disk drive evaluating multiple vibration sensor outputs to enable write-protection |
| US8995075B1 (en) | 2012-06-21 | 2015-03-31 | Western Digital Technologies, Inc. | Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary |
| US8937784B1 (en) | 2012-08-01 | 2015-01-20 | Western Digital Technologies, Inc. | Disk drive employing feed-forward compensation and phase shift compensation during seek settling |
| US8947819B1 (en) | 2012-08-28 | 2015-02-03 | Western Digital Technologies, Inc. | Disk drive implementing hysteresis for primary shock detector based on a more sensitive secondary shock detector |
| US8917469B1 (en) | 2012-09-13 | 2014-12-23 | Western Digital Technologies, Inc. | Disk drive correcting an error in a detected gray code |
| US8922938B1 (en) | 2012-11-02 | 2014-12-30 | Western Digital Technologies, Inc. | Disk drive filtering disturbance signal and error signal for adaptive feed-forward compensation |
| US8879191B1 (en) | 2012-11-14 | 2014-11-04 | Western Digital Technologies, Inc. | Disk drive modifying rotational position optimization algorithm to achieve target performance for limited stroke |
| US9076490B1 (en) | 2012-12-12 | 2015-07-07 | Western Digital Technologies, Inc. | Disk drive writing radial offset spiral servo tracks by reading spiral seed tracks |
| US8929022B1 (en) | 2012-12-19 | 2015-01-06 | Western Digital Technologies, Inc. | Disk drive detecting microactuator degradation by evaluating frequency component of servo signal |
| US9047919B1 (en) | 2013-03-12 | 2015-06-02 | Western Digitial Technologies, Inc. | Disk drive initializing servo read channel by reading data preceding servo preamble during access operation |
| US8902538B1 (en) | 2013-03-29 | 2014-12-02 | Western Digital Technologies, Inc. | Disk drive detecting crack in microactuator |
| US9001454B1 (en) | 2013-04-12 | 2015-04-07 | Western Digital Technologies, Inc. | Disk drive adjusting phase of adaptive feed-forward controller when reconfiguring servo loop |
| US20140320998A1 (en) | 2013-04-24 | 2014-10-30 | Western Digital Technologies, Inc. | Disk drive with improved spin-up control |
| US8896957B1 (en) | 2013-05-10 | 2014-11-25 | Western Digital Technologies, Inc. | Disk drive performing spiral scan of disk surface to detect residual data |
| US8953271B1 (en) | 2013-05-13 | 2015-02-10 | Western Digital Technologies, Inc. | Disk drive compensating for repeatable run out selectively per zone |
| US8922931B1 (en) | 2013-05-13 | 2014-12-30 | Western Digital Technologies, Inc. | Disk drive releasing variable amount of buffered write data based on sliding window of predicted servo quality |
| US8891194B1 (en) | 2013-05-14 | 2014-11-18 | Western Digital Technologies, Inc. | Disk drive iteratively adapting correction value that compensates for non-linearity of head |
| US9047901B1 (en) | 2013-05-28 | 2015-06-02 | Western Digital Technologies, Inc. | Disk drive measuring spiral track error by measuring a slope of a spiral track across a disk radius |
| US8830617B1 (en) | 2013-05-30 | 2014-09-09 | Western Digital Technologies, Inc. | Disk drive adjusting state estimator to compensate for unreliable servo data |
| US9026728B1 (en) | 2013-06-06 | 2015-05-05 | Western Digital Technologies, Inc. | Disk drive applying feed-forward compensation when writing consecutive data tracks |
| US9147418B1 (en) | 2013-06-20 | 2015-09-29 | Western Digital Technologies, Inc. | Disk drive compensating for microactuator gain variations |
| US9058827B1 (en) | 2013-06-25 | 2015-06-16 | Western Digitial Technologies, Inc. | Disk drive optimizing filters based on sensor signal and disturbance signal for adaptive feed-forward compensation |
| US9076471B1 (en) | 2013-07-31 | 2015-07-07 | Western Digital Technologies, Inc. | Fall detection scheme using FFS |
| US9484733B1 (en) | 2013-09-11 | 2016-11-01 | Western Digital Technologies, Inc. | Power control module for data storage device |
| US9064537B1 (en) | 2013-09-13 | 2015-06-23 | Western Digital Technologies, Inc. | Disk drive measuring radial offset between heads by detecting a difference between ramp contact |
| US8941939B1 (en) | 2013-10-24 | 2015-01-27 | Western Digital Technologies, Inc. | Disk drive using VCM BEMF feed-forward compensation to write servo data to a disk |
| US9823294B1 (en) | 2013-10-29 | 2017-11-21 | Western Digital Technologies, Inc. | Negative voltage testing methodology and tester |
| US9058834B1 (en) | 2013-11-08 | 2015-06-16 | Western Digital Technologies, Inc. | Power architecture for low power modes in storage devices |
| US9471072B1 (en) | 2013-11-14 | 2016-10-18 | Western Digital Technologies, Inc | Self-adaptive voltage scaling |
| US9142249B1 (en) | 2013-12-06 | 2015-09-22 | Western Digital Technologies, Inc. | Disk drive using timing loop control signal for vibration compensation in servo loop |
| US8970979B1 (en) | 2013-12-18 | 2015-03-03 | Western Digital Technologies, Inc. | Disk drive determining frequency response of actuator near servo sample frequency |
| US8917475B1 (en) | 2013-12-20 | 2014-12-23 | Western Digital Technologies, Inc. | Disk drive generating a disk locked clock using radial dependent timing feed-forward compensation |
| US9025269B1 (en) | 2014-01-02 | 2015-05-05 | Western Digital Technologies, Inc. | Disk drive compensating for cycle slip of disk locked clock when reading mini-wedge |
| US9053726B1 (en) | 2014-01-29 | 2015-06-09 | Western Digital Technologies, Inc. | Data storage device on-line adapting disturbance observer filter |
| US9269386B1 (en) | 2014-01-29 | 2016-02-23 | Western Digital Technologies, Inc. | Data storage device on-line adapting disturbance observer filter |
| US9058826B1 (en) | 2014-02-13 | 2015-06-16 | Western Digital Technologies, Inc. | Data storage device detecting free fall condition from disk speed variations |
| US9361939B1 (en) | 2014-03-10 | 2016-06-07 | Western Digital Technologies, Inc. | Data storage device characterizing geometry of magnetic transitions |
| US9047932B1 (en) | 2014-03-21 | 2015-06-02 | Western Digital Technologies, Inc. | Data storage device adjusting a power loss threshold based on samples of supply voltage |
| US9141177B1 (en) | 2014-03-21 | 2015-09-22 | Western Digital Technologies, Inc. | Data storage device employing glitch compensation for power loss detection |
| US8913342B1 (en) | 2014-03-21 | 2014-12-16 | Western Digital Technologies, Inc. | Data storage device adjusting range of microactuator digital-to-analog converter based on operating temperature |
| US9142225B1 (en) | 2014-03-21 | 2015-09-22 | Western Digital Technologies, Inc. | Electronic system with actuator control mechanism and method of operation thereof |
| US9013825B1 (en) | 2014-03-24 | 2015-04-21 | Western Digital Technologies, Inc. | Electronic system with vibration management mechanism and method of operation thereof |
| US8934186B1 (en) | 2014-03-26 | 2015-01-13 | Western Digital Technologies, Inc. | Data storage device estimating servo zone to reduce size of track address |
| US9208808B1 (en) | 2014-04-22 | 2015-12-08 | Western Digital Technologies, Inc. | Electronic system with unload management mechanism and method of operation thereof |
| US8982490B1 (en) | 2014-04-24 | 2015-03-17 | Western Digital Technologies, Inc. | Data storage device reading first spiral track while simultaneously writing second spiral track |
| US9208810B1 (en) | 2014-04-24 | 2015-12-08 | Western Digital Technologies, Inc. | Data storage device attenuating interference from first spiral track when reading second spiral track |
| US8891191B1 (en) | 2014-05-06 | 2014-11-18 | Western Digital Technologies, Inc. | Data storage device initializing read signal gain to detect servo seed pattern |
| US9053712B1 (en) | 2014-05-07 | 2015-06-09 | Western Digital Technologies, Inc. | Data storage device reading servo sector while writing data sector |
| US8902539B1 (en) | 2014-05-13 | 2014-12-02 | Western Digital Technologies, Inc. | Data storage device reducing seek power consumption |
| US9171567B1 (en) | 2014-05-27 | 2015-10-27 | Western Digital Technologies, Inc. | Data storage device employing sliding mode control of spindle motor |
| US8922940B1 (en) | 2014-05-27 | 2014-12-30 | Western Digital Technologies, Inc. | Data storage device reducing spindle motor voltage boost during power failure |
| US9053727B1 (en) | 2014-06-02 | 2015-06-09 | Western Digital Technologies, Inc. | Disk drive opening spiral crossing window based on DC and AC spiral track error |
| US9013824B1 (en) | 2014-06-04 | 2015-04-21 | Western Digital Technologies, Inc. | Data storage device comprising dual read sensors and dual servo channels to improve servo demodulation |
| US8941945B1 (en) | 2014-06-06 | 2015-01-27 | Western Digital Technologies, Inc. | Data storage device servoing heads based on virtual servo tracks |
| US8958169B1 (en) | 2014-06-11 | 2015-02-17 | Western Digital Technologies, Inc. | Data storage device re-qualifying state estimator while decelerating head |
| US9350278B1 (en) | 2014-06-13 | 2016-05-24 | Western Digital Technologies, Inc. | Circuit technique to integrate voice coil motor support elements |
| US9171568B1 (en) | 2014-06-25 | 2015-10-27 | Western Digital Technologies, Inc. | Data storage device periodically re-initializing spindle motor commutation sequence based on timing data |
| US9007714B1 (en) | 2014-07-18 | 2015-04-14 | Western Digital Technologies Inc. | Data storage device comprising slew rate anti-windup compensation for microactuator |
| US9349401B1 (en) | 2014-07-24 | 2016-05-24 | Western Digital Technologies, Inc. | Electronic system with media scan mechanism and method of operation thereof |
| US9076473B1 (en) | 2014-08-12 | 2015-07-07 | Western Digital Technologies, Inc. | Data storage device detecting fly height instability of head during load operation based on microactuator response |
| US9076472B1 (en) | 2014-08-21 | 2015-07-07 | Western Digital (Fremont), Llc | Apparatus enabling writing servo data when disk reaches target rotation speed |
| US8982501B1 (en) | 2014-09-22 | 2015-03-17 | Western Digital Technologies, Inc. | Data storage device compensating for repeatable disturbance when commutating a spindle motor |
| US9099147B1 (en) | 2014-09-22 | 2015-08-04 | Western Digital Technologies, Inc. | Data storage device commutating a spindle motor using closed-loop rotation phase alignment |
| US9153283B1 (en) | 2014-09-30 | 2015-10-06 | Western Digital Technologies, Inc. | Data storage device compensating for hysteretic response of microactuator |
| US9418689B2 (en) | 2014-10-09 | 2016-08-16 | Western Digital Technologies, Inc. | Data storage device generating an operating seek time profile as a function of a base seek time profile |
| US9208815B1 (en) | 2014-10-09 | 2015-12-08 | Western Digital Technologies, Inc. | Data storage device dynamically reducing coast velocity during seek to reduce power consumption |
| US9111575B1 (en) | 2014-10-23 | 2015-08-18 | Western Digital Technologies, Inc. | Data storage device employing adaptive feed-forward control in timing loop to compensate for vibration |
| US9165583B1 (en) | 2014-10-29 | 2015-10-20 | Western Digital Technologies, Inc. | Data storage device adjusting seek profile based on seek length when ending track is near ramp |
| US9245540B1 (en) | 2014-10-29 | 2016-01-26 | Western Digital Technologies, Inc. | Voice coil motor temperature sensing circuit to reduce catastrophic failure due to voice coil motor coil shorting to ground |
| US9355667B1 (en) | 2014-11-11 | 2016-05-31 | Western Digital Technologies, Inc. | Data storage device saving absolute position at each servo wedge for previous write operations |
| US9454212B1 (en) | 2014-12-08 | 2016-09-27 | Western Digital Technologies, Inc. | Wakeup detector |
| US9251823B1 (en) | 2014-12-10 | 2016-02-02 | Western Digital Technologies, Inc. | Data storage device delaying seek operation to avoid thermal asperities |
| US9286927B1 (en) | 2014-12-16 | 2016-03-15 | Western Digital Technologies, Inc. | Data storage device demodulating servo burst by computing slope of intermediate integration points |
| US9129630B1 (en) | 2014-12-16 | 2015-09-08 | Western Digital Technologies, Inc. | Data storage device employing full servo sectors on first disk surface and mini servo sectors on second disk surface |
| US9581978B1 (en) | 2014-12-17 | 2017-02-28 | Western Digital Technologies, Inc. | Electronic system with servo management mechanism and method of operation thereof |
| US9230592B1 (en) | 2014-12-23 | 2016-01-05 | Western Digital Technologies, Inc. | Electronic system with a method of motor spindle bandwidth estimation and calibration thereof |
| US9230593B1 (en) | 2014-12-23 | 2016-01-05 | Western Digital Technologies, Inc. | Data storage device optimizing spindle motor power when transitioning into a power failure mode |
| US9407015B1 (en) | 2014-12-29 | 2016-08-02 | Western Digital Technologies, Inc. | Automatic power disconnect device |
| US9437237B1 (en) | 2015-02-20 | 2016-09-06 | Western Digital Technologies, Inc. | Method to detect power loss through data storage device spindle speed |
| US9959204B1 (en) | 2015-03-09 | 2018-05-01 | Western Digital Technologies, Inc. | Tracking sequential ranges of non-ordered data |
| US9245560B1 (en) | 2015-03-09 | 2016-01-26 | Western Digital Technologies, Inc. | Data storage device measuring reader/writer offset by reading spiral track and concentric servo sectors |
| US9214175B1 (en) | 2015-03-16 | 2015-12-15 | Western Digital Technologies, Inc. | Data storage device configuring a gain of a servo control system for actuating a head over a disk |
| US9355676B1 (en) | 2015-03-25 | 2016-05-31 | Western Digital Technologies, Inc. | Data storage device controlling amplitude and phase of driving voltage to generate power from a spindle motor |
| US9343102B1 (en) | 2015-03-25 | 2016-05-17 | Western Digital Technologies, Inc. | Data storage device employing a phase offset to generate power from a spindle motor during a power failure |
| US9245577B1 (en) | 2015-03-26 | 2016-01-26 | Western Digital Technologies, Inc. | Data storage device comprising spindle motor current sensing with supply voltage noise attenuation |
| US9343094B1 (en) | 2015-03-26 | 2016-05-17 | Western Digital Technologies, Inc. | Data storage device filtering burst correction values before downsampling the burst correction values |
| US9286925B1 (en) | 2015-03-26 | 2016-03-15 | Western Digital Technologies, Inc. | Data storage device writing multiple burst correction values at the same radial location |
| US9886285B2 (en) | 2015-03-31 | 2018-02-06 | Western Digital Technologies, Inc. | Communication interface initialization |
| US9824708B2 (en) | 2015-03-31 | 2017-11-21 | Kabushiki Kaisha Toshiba | Spiral write launch while servoing on reference guide spirals |
| US9424868B1 (en) | 2015-05-12 | 2016-08-23 | Western Digital Technologies, Inc. | Data storage device employing spindle motor driving profile during seek to improve power performance |
| US9396751B1 (en) | 2015-06-26 | 2016-07-19 | Western Digital Technologies, Inc. | Data storage device compensating for fabrication tolerances when measuring spindle motor current |
| US9542966B1 (en) | 2015-07-09 | 2017-01-10 | Western Digital Technologies, Inc. | Data storage devices and methods with frequency-shaped sliding mode control |
| US9437231B1 (en) | 2015-09-25 | 2016-09-06 | Western Digital Technologies, Inc. | Data storage device concurrently controlling and sensing a secondary actuator for actuating a head over a disk |
| US9899834B1 (en) | 2015-11-18 | 2018-02-20 | Western Digital Technologies, Inc. | Power control module using protection circuit for regulating backup voltage to power load during power fault |
| US9564162B1 (en) | 2015-12-28 | 2017-02-07 | Western Digital Technologies, Inc. | Data storage device measuring resonant frequency of a shock sensor by applying differential excitation and measuring oscillation |
| US9620160B1 (en) | 2015-12-28 | 2017-04-11 | Western Digital Technologies, Inc. | Data storage device measuring resonant frequency of a shock sensor by inserting the shock sensor into an oscillator circuit |
| CN107180646B (zh) * | 2016-03-10 | 2019-05-07 | 株式会社东芝 | 磁盘装置和头位置的校正方法 |
| US9953672B1 (en) * | 2016-10-21 | 2018-04-24 | Kabushiki Kaisha Toshiba | Accurate repeatable runout compensation in disk drives during seeks |
| US10269385B1 (en) * | 2018-06-07 | 2019-04-23 | Western Digital Technologies, Inc. | Data storage device switching disk surfaces to perform seek using spiral track |
| US10607645B1 (en) * | 2019-06-28 | 2020-03-31 | Western Digital Technologies, Inc. | Data storage device generating PES RRO and data sector squeeze RRO for a plurality of zones |
| US10783911B1 (en) | 2020-02-24 | 2020-09-22 | Western Digital Technologies, Inc. | Data storage device bank writing servo sectors for interleaved servo control processing |
| US10867629B1 (en) | 2020-03-04 | 2020-12-15 | Western Digital Technologies, Inc. | Data storage device employing staggered servo wedges to increase capacity |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6963466B2 (en) * | 2003-06-25 | 2005-11-08 | Seagate Technology Llc | Radial dependent low frequency repeatable run out compensation apparatus and method |
| US6965489B1 (en) * | 2004-01-31 | 2005-11-15 | Western Digital Technologies, Inc. | Using an external spiral servo writer to write reference servo sectors and spiral tracks to a disk to facilitate writing product servo sectors to the disk |
| CN1741137A (zh) * | 2004-07-27 | 2006-03-01 | 日立环球储存科技荷兰有限公司 | 磁盘驱动器 |
| CN1959833A (zh) * | 2006-09-28 | 2007-05-09 | 重庆禾兴江源科技发展有限公司 | 消除可重复偏心误差的自伺服刻写方法和装置 |
| CN101197176A (zh) * | 2006-12-07 | 2008-06-11 | 株式会社东芝 | 测试磁盘驱动器的磁盘介质上的伺服数据的方法和装置 |
Family Cites Families (52)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4107746A (en) | 1977-10-25 | 1978-08-15 | Control Data Corporation | Continuous spiral mode tracking in a conventional disk drive using concentric servo tracks |
| US5815485A (en) | 1993-02-02 | 1998-09-29 | Matsushita Electric Industrial Co., Ltd. | Recording medium, a method for producing the same, a control method using the recording medium, and a recording/reproducing apparatus using the recording medium |
| US5668679A (en) | 1995-12-21 | 1997-09-16 | Quantum Corporation | System for self-servowriting a disk drive |
| US6091564A (en) | 1998-04-30 | 2000-07-18 | Western Digital Corporation | Disk drive with calibration bursts that are recorded on a spiral and method of recording the same |
| US6344942B1 (en) | 1998-07-16 | 2002-02-05 | International Business Machines Corporation | Method and apparatus for absolute track spacing determination for self-servowriting |
| US6411459B1 (en) | 1999-02-22 | 2002-06-25 | Seagate Technology Llc | Advanced servo writing method for hard disc drives |
| US6519107B1 (en) | 1999-09-24 | 2003-02-11 | Maxtor Corporation | Hard disk drive having self-written servo burst patterns |
| US6631046B2 (en) | 2000-01-10 | 2003-10-07 | Seagate Technology Llc | Servo track writing using extended copying with head offset |
| US7133239B1 (en) | 2000-05-09 | 2006-11-07 | Maxtor Corporation | Methods and apparatuses for writing spiral servo patterns onto a disk surface |
| US7139144B1 (en) | 2000-08-04 | 2006-11-21 | Maxtor Corporation | Method and apparatus for writing spiral servo information by modifying existing servo track writing equipment |
| US6654198B2 (en) * | 2000-08-23 | 2003-11-25 | Seagate Technology Llc | Repeatable run-out error compensation method for a disc drive |
| US7133233B1 (en) | 2000-10-24 | 2006-11-07 | Maxtor Corporation | Disk drive with read while write capability |
| US7158330B2 (en) | 2001-11-08 | 2007-01-02 | Samsung Electronics Co., Ltd. | Method and apparatus for servo track writing by track following on a dedicated servo disk on a fluid spindle bearing |
| JP2003162874A (ja) | 2001-11-27 | 2003-06-06 | Toshiba Corp | ヘッド位置決め情報書き込み装置及び方法 |
| US6977791B2 (en) | 2002-03-23 | 2005-12-20 | Kla-Tencor Technologies Corporation | Media servowriting system |
| US6992848B1 (en) * | 2002-03-29 | 2006-01-31 | Western Digital Technologies, Inc. | Using an external spiral servo writer to write spiral reference patterns to a disk to facilitate writing product servo bursts to the disk |
| US7088533B1 (en) * | 2002-04-23 | 2006-08-08 | Maxtor Corporation | Method of self-servo writing in a disk drive using a spiral pattern |
| US7123433B1 (en) * | 2002-08-14 | 2006-10-17 | Maxtor Corporation | Method and apparatus for runout correction during self-servo writing |
| US7218471B2 (en) | 2002-12-05 | 2007-05-15 | Meyer Dallas W | Self-servo writing using recording head micropositioner |
| JP2004288229A (ja) | 2003-01-27 | 2004-10-14 | Fuji Electric Device Technology Co Ltd | 磁気データ埋込装置 |
| JP2004265560A (ja) | 2003-03-04 | 2004-09-24 | Fuji Electric Device Technology Co Ltd | 磁気データ埋込装置のヘッド位置割り出し方法 |
| JP2004280963A (ja) | 2003-03-17 | 2004-10-07 | Fuji Electric Device Technology Co Ltd | 照合機能付磁気データ埋込装置 |
| US7230786B1 (en) * | 2003-06-02 | 2007-06-12 | Maxtor Corporation | Method and apparatus for dynamic placement of an integration window in a disk drive having a disk surface with spiral servo information written thereon |
| US7499234B1 (en) | 2003-06-02 | 2009-03-03 | Maxtor Corporation | Method and apparatus for modifying spiral profile using reference tracks written onto a disk surface of a disk drive |
| US7623313B1 (en) * | 2003-06-02 | 2009-11-24 | Maxtor Corporation | Method and apparatus for performing a self-servo write operation in a disk drive |
| US7561359B1 (en) | 2003-06-02 | 2009-07-14 | Maxtor Corporation | Spiral servo patterns with absolute reference point |
| US7212369B1 (en) | 2003-08-15 | 2007-05-01 | Maxtor Corporation | Method and apparatus for performing a spiral self-servo write operation in a disk drive using an auto detection scheme |
| US7307807B1 (en) | 2003-09-23 | 2007-12-11 | Marvell International Ltd. | Disk servo pattern writing |
| KR100532478B1 (ko) | 2003-11-10 | 2005-11-30 | 삼성전자주식회사 | 오프라인 셀프 서보 기록 방법 및 이를 이용한 디스크드라이브 |
| US7230789B1 (en) | 2004-04-08 | 2007-06-12 | Maxtor Corporation | Method and apparatus for performing a self-servo write operation in a disk drive using spiral servo information |
| US7133240B2 (en) | 2004-07-08 | 2006-11-07 | Matsushita Electric Industrial Co., Ltd. | Systems and methods for two-step self-servowriting without removing timing eccentricity on intermediate patterns |
| US7116511B2 (en) | 2004-07-08 | 2006-10-03 | Matsushita Electric Inductrial Co., Ltd. | Systems and methods for two-step reference pattern self-servowriting |
| US7206157B2 (en) | 2004-07-08 | 2007-04-17 | Matsushita Electric Industrial Co., Ltd. | Systems and methods for two-step self-servowriting using optimal intermediate pattern |
| US7248426B1 (en) | 2004-07-30 | 2007-07-24 | Western Digital Technologies, Inc. | Servo writing a disk drive from spiral tracks by shifting a demodulation window an integer number of sync mark intervals |
| US7433143B1 (en) | 2004-09-17 | 2008-10-07 | Western Digital Technologies, Inc. | Adjusting track density by changing slope of spiral tracks used to servo write a disk drive |
| JP2007066420A (ja) | 2005-08-31 | 2007-03-15 | Toshiba Corp | サーボ書き込み方法及びディスクドライブ |
| US7312943B2 (en) | 2005-09-28 | 2007-12-25 | Broadcom Corporation | Read write (RW) head position control for self servo writing process |
| KR100652436B1 (ko) | 2005-10-11 | 2006-12-01 | 삼성전자주식회사 | 하드디스크 드라이브의 레퍼런스 서보 신호 기록 방법 및이에 적합한 장치 |
| US7471482B2 (en) | 2006-02-20 | 2008-12-30 | Marvell World Trade Ltd. | Method for improved insitu spiral writing |
| US8879187B2 (en) | 2006-03-06 | 2014-11-04 | Seagate Technology Llc | Self-writing of servo patterns |
| US7471481B2 (en) | 2006-03-08 | 2008-12-30 | Broadcom Corporation | Method for establishing and maintaining radial position for hard disk drive self servo write without seed wedges |
| JP2008010101A (ja) | 2006-06-30 | 2008-01-17 | Toshiba Corp | サーボ書込み方法及びディスク記憶装置 |
| US7646559B1 (en) * | 2006-10-02 | 2010-01-12 | Marvell International Ltd. | Self-servo write stitching system |
| US7773334B1 (en) * | 2006-12-06 | 2010-08-10 | Marvell International Ltd. | Single-pass spiral self-servo-write |
| US20080239556A1 (en) | 2007-03-30 | 2008-10-02 | Toshiba America Information Systems, Inc. | Linearizing position error signal using spiral servo information |
| US7764457B1 (en) * | 2007-08-10 | 2010-07-27 | Marvell International Ltd. | Spiral band end detection |
| US7505223B1 (en) | 2007-09-05 | 2009-03-17 | Western Digital Technologies, Inc. | Compensating for non-linear thermal expansion when writing spiral tracks to a disk of a disk drive |
| US20090086357A1 (en) | 2007-09-28 | 2009-04-02 | Toshiba America Information Systems, Inc. | In drive written spirals for self servo writing |
| US7839591B1 (en) | 2008-02-11 | 2010-11-23 | Western Digital Technologies, Inc. | Disk drive comprising index spiral track identified by change in sync mark |
| US7843662B1 (en) | 2008-06-10 | 2010-11-30 | Western Digital Technologies, Inc. | Servoing on concentric servo sectors of a first disk surface to write a spiral servo track to a second disk surface |
| US7688542B2 (en) | 2008-07-02 | 2010-03-30 | Samsung Electronics Co., Ltd. | Method to identify short spirals |
| US8537486B2 (en) * | 2011-08-10 | 2013-09-17 | Western Digital Technologies, Inc. | Disk drive writing spiral tracks on a slave surface using repeatable runout compensation for a master surface |
-
2011
- 2011-08-10 US US13/207,332 patent/US8537486B2/en not_active Expired - Fee Related
-
2012
- 2012-08-07 CN CN201210279229.4A patent/CN102956242B/zh not_active Expired - Fee Related
-
2013
- 2013-05-21 HK HK13105977.1A patent/HK1179043A1/zh not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6963466B2 (en) * | 2003-06-25 | 2005-11-08 | Seagate Technology Llc | Radial dependent low frequency repeatable run out compensation apparatus and method |
| US6965489B1 (en) * | 2004-01-31 | 2005-11-15 | Western Digital Technologies, Inc. | Using an external spiral servo writer to write reference servo sectors and spiral tracks to a disk to facilitate writing product servo sectors to the disk |
| CN1741137A (zh) * | 2004-07-27 | 2006-03-01 | 日立环球储存科技荷兰有限公司 | 磁盘驱动器 |
| CN1959833A (zh) * | 2006-09-28 | 2007-05-09 | 重庆禾兴江源科技发展有限公司 | 消除可重复偏心误差的自伺服刻写方法和装置 |
| CN101197176A (zh) * | 2006-12-07 | 2008-06-11 | 株式会社东芝 | 测试磁盘驱动器的磁盘介质上的伺服数据的方法和装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102956242A (zh) | 2013-03-06 |
| US20130038959A1 (en) | 2013-02-14 |
| US8537486B2 (en) | 2013-09-17 |
| HK1179043A1 (zh) | 2013-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102956242B (zh) | 磁盘驱动器以及对磁盘驱动器进行伺服写入的方法 | |
| CN102842311B (zh) | 划定数据磁道以避开热粗糙的磁盘驱动器 | |
| US8670206B1 (en) | Disk drive estimating repeatable runout of reference pattern based on repeatable runout of phase error | |
| US20120275050A1 (en) | Disk drive adjusting rotational position optimization (rpo) algorithm to compensate for repeatable runout (rro) | |
| US8699173B1 (en) | Disk drive detecting touchdown event by evaluating frequency response of a touchdown metric | |
| CN100444277C (zh) | 硬盘驱动器中写螺旋基准伺服信号的方法和温度补偿方法 | |
| CN101436411B (zh) | 磁盘驱动器 | |
| US8477442B2 (en) | Patterned media for self-servowriting integrated servo fields | |
| US8786979B1 (en) | Self servo write process for discrete track media | |
| US8184392B1 (en) | Calibrating servos | |
| US9070411B1 (en) | Writable servo overlap zones | |
| EP2626858A1 (en) | Disk-based storage device with head position control responsive to detected inter-track interference | |
| US7027253B1 (en) | Microactuator servo control during self writing of servo data | |
| US7324295B2 (en) | Method of detecting position of head in recording medium drive | |
| US8902539B1 (en) | Data storage device reducing seek power consumption | |
| US9318139B2 (en) | Recording medium, a data storage apparatus and a method of preparing a recording medium | |
| CN106024023A (zh) | 利用针对蝶形写入磁盘表面的多个微动轮廓的数据存储设备 | |
| US9761258B2 (en) | Servo parameterization for multi-sensor reader | |
| CN101197176A (zh) | 测试磁盘驱动器的磁盘介质上的伺服数据的方法和装置 | |
| CN105304098A (zh) | 基于虚拟伺服磁道伺服控制磁头的数据存储设备 | |
| JP5002685B2 (ja) | 磁気記録媒体およびディスク装置 | |
| US8861116B2 (en) | Track pitch variation measurement method using spiral DC pattern writing | |
| US8098453B2 (en) | Magnetic storage medium and storage apparatus | |
| US8649117B2 (en) | Method of writing a preamble field on a disk drive to reduce track squeeze | |
| US10269385B1 (en) | Data storage device switching disk surfaces to perform seek using spiral track |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1179043 Country of ref document: HK |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1179043 Country of ref document: HK |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20170807 |