公开(公告)号：US06587977B1

公开(公告)日：2003-07-01

申请号：US09455624

申请日：1999-12-06

申请人： C. M. (Mike) Riggle ,  John W. VanLaanen

发明人： C. M. (Mike) Riggle ,  John W. VanLaanen

IPC分类号： G06F1100

CPC分类号： H03M5/145 ,  G11B20/1426

摘要： A method for encoding data to meet a maximum run length limitation is disclosed. In one embodiment, the method comprises the steps of: (1) providing user data that includes a plurality of bits, wherein said bits have a value of 1 or 0; (2) performing an ECC computation on said plurality of user data bits to add ECC symbols in the form of a plurality of ECC bits; (3) randomizing the plurality of user data bits and said plurality of ECC bits; (4) analyzing said randomized user data bits and ECC bits to determine whether a number of consecutive bits have a common value; and, (5) inverting the value of a bit, when the number of consecutive bits having a common value exceeds the maximum run length limitation. Subsequently, representations of each of the randomized user bits and ECC bits, including any inverted bits, are stored onto a disk surface as magnetic-polarity transitions. Later, the stored magnetic-polarity transitions are read from the disk surface and the randomized user bits and ECC bits, including any inverted bits, are recovered. The randomized user bits and ECC bits are derandomized, and the value of the inverted bit is inverted to its original value using the ECC computations. Accordingly, the original user data is recovered.

摘要翻译： 公开了一种用于编码数据以满足最大游程长度限制的方法。 在一个实施例中，该方法包括以下步骤：（1）提供包括多个比特的用户数据，其中所述比特的值为1或0; （2）对所述多个用户数据比特执行ECC计算，以便以多个ECC比特的形式添加ECC符号; （3）使所述多个用户数据位和所述多个ECC位随机化; （4）分析所述随机用户数据比特和ECC比特以确定连续比特数是否具有公共值; 并且，当具有公共值的连续比特数超过最大游程长度限制时，（5）反转比特的值。 随后，随机化用户比特和ECC比特（包括任何反相）的表示在磁极转换时被存储在磁盘表面上。 之后，从磁盘表面读取所存储的磁极性转变，并恢复包括任何反转位的随机用户比特和ECC比特。 随机用户比特和ECC比特被去并发，并且使用ECC计算将反相比特的值反转到其原始值。 因此，恢复原始用户数据。

公开(公告)号：US08711506B1

公开(公告)日：2014-04-29

申请号：US13485373

申请日：2012-05-31

申请人： Davide Giovenzana ,  John W. Vanlaanen ,  Prakash Balasubramaniam ,  Teik Ee Yeo ,  Guoxiao Guo ,  Honge Wang ,  Jie Yu ,  Philip S. Gordon

发明人： Davide Giovenzana ,  John W. Vanlaanen ,  Prakash Balasubramaniam ,  Teik Ee Yeo ,  Guoxiao Guo ,  Honge Wang ,  Jie Yu ,  Philip S. Gordon

IPC分类号： G11B5/09

CPC分类号： G11B5/5547 ,  G11B5/4886

摘要： A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors. The disk drive further comprises a head comprising a read element offset linearly from a write element by a gap such that when the disk rotates, the read element reaches a servo sector before the write element. During a first operation, a first length of a beginning of the servo sector is read, and during a write operation, a second length of the beginning of the servo sector shorter than the first length is read to enable data to be written while the read element is over at least part of the servo sector.

摘要翻译： 公开了一种盘驱动器，其包括由伺服扇区限定的多个伺服轨道的盘。 磁盘驱动器还包括一个磁头，其包括一个读取元件，该读取元件通过间隙与写入元件线性偏移，使得当磁盘旋转时，读取元件在写入元件之前到达伺服扇区。 在第一操作期间，读取伺服扇区的开始的第一长度，并且在写入操作期间，读取比第一长度短的伺服扇区的开始的第二长度，以便在读取时能够写入数据 元件在伺服扇区的至少一部分上。

公开(公告)号：US07752491B1

公开(公告)日：2010-07-06

申请号：US11583550

申请日：2006-10-19

申请人： Bruce A. Liikanen ,  John W. VanLaanen ,  Andrew W. Vogan

发明人： Bruce A. Liikanen ,  John W. VanLaanen ,  Andrew W. Vogan

IPC分类号： G06F11/00

CPC分类号： G06F11/2087 ,  G11B20/1883 ,  G11B2020/10759 ,  G11B2220/20 ,  G11B2220/2516

摘要： Methods and structures for providing on-the-fly head depopulation in a dynamically mapped storage device. In a dynamically mapped storage device in which all user supplied logical blocks are dynamically mapped by the storage device controller to physical disk blocks, features and aspects hereof allow on-the-fly head depopulation to protect data when a subsection of a storage device, such as a head of surface is failing. When the storage device detects that a head is failing, data may be migrated off the failing subsection into other subsections (e.g., a different head or surface) using mapping features and aspects hereof. Thus, the data on the failing subsection is still available should the subsection or head eventually fail.

摘要翻译： 用于在动态映射的存储设备中提供飞行头减少的方法和结构。 在其中所有用户提供的逻辑块由存储设备控制器动态地映射到物理磁盘块的动态映射存储设备中，其特征和方面允许在运行中减少头部以在存储设备的子部分（例如， 作为表面的头脑是失败的。 当存储设备检测到磁头发生故障时，数据可以使用其映射特征和方面从故障子部件迁移到其他子部分（例如，不同的磁头或表面）。 因此，如果子部分或头部最终失败，则失败的子部分的数据仍然可用。

公开(公告)号：US07653847B1

公开(公告)日：2010-01-26

申请号：US11583767

申请日：2006-10-19

申请人： Bruce A. Liikanen ,  Eric D. Mudama ,  John W. VanLaanen ,  Andrew W. Vogan

发明人： Bruce A. Liikanen ,  Eric D. Mudama ,  John W. VanLaanen ,  Andrew W. Vogan

IPC分类号： G11C29/00

CPC分类号： G01R33/1207

摘要： Methods and structures for performing field flawscan to reduce manufacturing costs of a dynamic mapped storage device. In a dynamic mapped storage device in which all user supplied logical blocks are dynamically mapped by the storage device controller to physical disk blocks, features and aspects hereof permit flawscan testing of a storage device to be completed substantially concurrently with processing write requests for its intended application. A fraction of the storage device may be certified by an initial flawscan performed during manufacturing testing. Statistical sampling sufficient to assure a high probability of achieving specified capacity may be performed to reduce manufacturing time and costs in testing. Final flawscan of the remainder of the storage locations may be performed substantially concurrently with processing of write requests after the device is installed for its intended application. Mapping features and aspects hereof allow the storage device controller to perform flawscan and write operations concurrently.

摘要翻译： 用于执行现场扫描以降低动态映射存储设备的制造成本的方法和结构。 在其中所有用户提供的逻辑块由存储设备控制器动态地映射到物理磁盘块的动态映射存储设备中，其特征和方面允许对处理对其预期应用的写入请求的存储设备进行大量同时完成的扫描测试 。 存储设备的一小部分可以通过在制造测试期间执行的初始扫描进行认证。 可以执行足以确保实现特定容量的高概率的统计学抽样，以减少制造时间和测试成本。 存储位置的剩余部分的最终的扫描可以在装置针对其预期应用安装之后基本上同时执行写入请求的处理。 映射其特征和方面允许存储设备控制器同时执行扫描和写入操作。

公开(公告)号：US08035910B2

公开(公告)日：2011-10-11

申请号：US11824137

申请日：2007-06-29

申请人： Michael L. Mallary ,  John W. Vanlaanen ,  Ching He

发明人： Michael L. Mallary ,  John W. Vanlaanen ,  Ching He

IPC分类号： G11B5/02

CPC分类号： G11B5/59616 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/3948 ,  G11B5/59638 ,  G11B5/746 ,  G11B5/82 ,  G11B20/10398 ,  G11B20/10509 ,  G11B20/1879 ,  G11B2220/252

摘要： A read/write head for use with bit-patterned media detects write synchronization errors between a write clock and the bit-patterned media. In particular, the read/write head writes data to the bit-patterned media using a write clock. The data is then read from the bit-patterned media and used to detect write synchronization errors between the write clock and the location of bit-islands on the bit-patterned media. Based on detected write synchronization errors, the phase associated with the write clock is modified to align the write clock with the location of bit-islands on the bit-patterned media.

摘要翻译： 用于位图形介质的读/写头检测写时钟和位图形介质之间的写入同步错误。 特别地，读/写头使用写时钟将数据写入位图案介质。 然后从位图形介质读取数据，并用于检测写时钟与位图形介质上位位置之间的写入同步错误。 基于检测到的写同步错误，修改与写时钟相关的相位，以使写时钟与位图形介质上的位岛的位置对齐。

公开(公告)号：US08000049B2

公开(公告)日：2011-08-16

申请号：US11704750

申请日：2007-02-09

申请人： John W. Vanlaanen ,  Charles R. Watt

发明人： John W. Vanlaanen ,  Charles R. Watt

IPC分类号： G11B5/02

CPC分类号： G11B5/59688

摘要： Methods for writing servo fields on a rotatable data storage disk using reference patterns on the data storage disk include generating a clock signal, reading a reference pattern signal from a surface of the disk, generating a phase error signal in response to a phase offset between the clock signal and the reference pattern signal, subtracting a timing control value from the phase error to provide an adjusted phase error, generating a frequency control signal in response to the adjusted phase error, and adjusting the frequency of the clock signal. The timing control value is generated in response to the phase error signal and the frequency control signal.

摘要翻译： 使用数据存储盘上的参考图案在可旋转数据存储盘上写入伺服字段的方法包括产生时钟信号，从盘的表面读取参考图形信号，响应于相位偏移产生相位误差信号 时钟信号和参考模式信号，从相位误差减去定时控制值以提供调整的相位误差，响应于调整的相位误差产生频率控制信号，并调整时钟信号的频率。 响应于相位误差信号和频率控制信号产生定时控制值。

公开(公告)号：US07675702B2

公开(公告)日：2010-03-09

申请号：US11752684

申请日：2007-05-23

申请人： Charles R. Watt ,  Xiao Zhang ,  John W. Vanlaanen

发明人： Charles R. Watt ,  Xiao Zhang ,  John W. Vanlaanen

IPC分类号： G11B5/02

CPC分类号： G11B5/59616 ,  G11B5/59633

摘要： Methods according to some embodiments include writing servo patterns on a data storage medium including a plurality of timing patterns in response to phase correction values generated using a phase correction value (PCV) kernel having a length that is less than the number of timing patterns on the data storage medium.

摘要翻译： 根据一些实施例的方法包括：响应于使用长度小于所述定时模式的数量的相位校正值（PCV）内核产生的相位校正值，在包括多个定时模式的数据存储介质上写入伺服模式 数据存储介质。

公开(公告)号：US07620772B1

公开(公告)日：2009-11-17

申请号：US11583331

申请日：2006-10-19

申请人： Bruce A. Liikanen ,  Mike L. Mallary ,  John Mead ,  Eric D. Mudama ,  John W. VanLaanen ,  Andrew W. Vogan

发明人： Bruce A. Liikanen ,  Mike L. Mallary ,  John Mead ,  Eric D. Mudama ,  John W. VanLaanen ,  Andrew W. Vogan

IPC分类号： G06F12/00

CPC分类号： G11B27/3027 ,  G06F2211/1004 ,  G11B27/322 ,  G11B2220/20

摘要： Methods and structures for dynamic density control to improve reliability of a dynamically mapped storage device. In a dynamically mapped storage device in which all user supplied logical blocks are dynamically mapped by the storage device controller to physical disk blocks, features and aspects hereof provide for dynamically altering the recording density of user data stored on the storage device. So long as the physical capacity utilization of the storage device permits, new data stored on the device may be stored at lower density to improve reliability in reading back the recorded data. Further features and aspects hereof may reduce the recording density only for data deemed to be critical. Radial (track) density, longitudinal (bit) density, or both may be dynamically controlled to reduce recording density. As physical capacity utilization increases, data previously recorded at lower density may be migrated (re-recorded) at normal higher density.

摘要翻译： 动态密度控制的方法和结构，以提高动态映射存储设备的可靠性。 在其中所有用户提供的逻辑块由存储设备控制器动态映射到物理磁盘块的动态映射存储设备中，其特征和方面提供动态地改变存储在存储设备上的用户数据的记录密度。 只要存储设备的物理容量利用率允许，存储在设备上的新数据可以以较低密度存储，以提高读回记录数据的可靠性。 本文的其它特征和方面可以仅对于被认为是关键的数据来降低记录密度。 可以动态地控制径向（轨道）密度，纵向（位）密度或两者）以降低记录密度。 随着物理容量利用的增加，以较低密度记录的数据可能以正常较高的密度迁移（重新记录）。

公开(公告)号：US07685360B1

公开(公告)日：2010-03-23

申请号：US11583341

申请日：2006-10-19

申请人： Don Brunnett ,  Bruce A. Liikanen ,  John Mead ,  Eric D. Mudama ,  John W. VanLaanen ,  Andrew W. Vogan

发明人： Don Brunnett ,  Bruce A. Liikanen ,  John Mead ,  Eric D. Mudama ,  John W. VanLaanen ,  Andrew W. Vogan

IPC分类号： G06F12/00

CPC分类号： G06F3/064 ,  G06F3/0608 ,  G06F3/0676 ,  G06F12/0866

摘要： Methods and structures for appending metadata with recorded data in a dynamic mapped storage device. In a dynamically mapped storage device in which all user supplied logical blocks are dynamically mapped by the storage device controller to physical disk blocks, features and aspects hereof allow presently unused physical space to be used for storing additional metadata associated with recorded data. As the current capacity ratio of the storage device increases, appending of metadata may cease and previously recorded data including metadata may be re-recorded (migrated) to eliminate the appended metadata. The appended metadata may be used for enhanced diagnosis and analysis of characteristics of the operating storage device and may be used to restore the content of the storage device to an earlier state. The metadata may include, for example, track following position of the read/write head, temperature, head flying height, and time of day.

摘要翻译： 在动态映射存储设备中添加带有记录数据的元数据的方法和结构。 在其中所有用户提供的逻辑块由存储设备控制器动态映射到物理磁盘块的动态映射存储设备中，其特征和方面允许当前未使用的物理空间用于存储与记录数据相关联的附加元数据。 随着存储设备的当前容量比增加，元数据的附加可能停止，并且可以重新记录（迁移）包括元数据的先前记录的数据以消除附加的元数据。 附加的元数据可以用于增强对操作存储设备的特性的诊断和分析，并且可以用于将存储设备的内容恢复到更早的状态。 元数据可以包括例如读/写头的跟踪位置，温度，头部飞行高度和一天中的时间。

公开(公告)号：US07551387B2

公开(公告)日：2009-06-23

申请号：US11740747

申请日：2007-04-26

申请人： Yu Sun ,  Dave McMurtrey ,  Bruce Liikanen ,  Don Brunnett ,  John W. VanLaanen ,  Charles R. Watt ,  Stan Shepherd ,  S. Craig Smith ,  Todd Franks ,  Lin Guo

发明人： Yu Sun ,  Dave McMurtrey ,  Bruce Liikanen ,  Don Brunnett ,  John W. VanLaanen ,  Charles R. Watt ,  Stan Shepherd ,  S. Craig Smith ,  Todd Franks ,  Lin Guo

IPC分类号： G11B21/02

CPC分类号： G11B25/043 ,  G11B5/59627 ,  G11B5/59661 ,  G11B5/59666

摘要： In accordance with various embodiments, a rotatable member is mounted to a spindle hub so that initial servo data previously provided to the rotatable member are eccentrically offset with respect to a rotational center of the spindle hub. Compensation vales are determined to characterize said offset, after which final servo data are provided to the rotatable member in relation to the initial servo data and the determined compensation values. The final servo data are nominally concentric with the rotational center of the spindle hub.

摘要翻译： 根据各种实施例，可旋转构件安装到主轴毂，使得先前提供给可旋转构件的初始伺服数据相对于主轴毂的旋转中心偏心偏移。 确定补偿值以表征所述偏移，之后相对于初始伺服数据和确定的补偿值将最终伺服数据提供给可旋转构件。 最终伺服数据名义上与主轴毂的旋转中心同心。