公开(公告)号：US07675703B2

公开(公告)日：2010-03-09

申请号：US11759959

申请日：2007-06-08

申请人： Thomas R. Albrecht ,  David Timothy Flynn ,  Richard Leo Galbraith ,  Michael Anthony Moser ,  Bruce Alexander Wilson ,  Xiao Z. Wu

发明人： Thomas R. Albrecht ,  David Timothy Flynn ,  Richard Leo Galbraith ,  Michael Anthony Moser ,  Bruce Alexander Wilson ,  Xiao Z. Wu

IPC分类号： G11B5/09

CPC分类号： G11B5/09 ,  G11B5/746 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/1403 ,  G11B2020/1281 ,  G11B2220/2516

摘要： A system and method accurately clocks write data to the discrete data blocks in a patterned media disk drive. The precise time intervals between successive timing marks in the data tracks are measured by a timing mark detector that counts the integer number of write clock cycles between successive timing marks and the fractional part of a write clock cycle by detecting the phase difference between a timing mark and a reference signal. The resulting timing error is output to a write clock compensator. The write clock is capable of generating equally spaced primary phases and phases intermediate the primary phases. The compensator includes a phase rotator that controls which write clock phase is selected for output. The value in a phase register of the compensator is used to control the phase rotator to advance or retard the write clock phase, and thus to adjust its frequency and phase so as to be synchronized for writing to the data blocks.

摘要翻译： 系统和方法将写入数据精确地记录在图案化媒体盘驱动器中的离散数据块上。 通过定时标记检测器来测量数据轨道中连续定时标记之间的精确时间间隔，该定时标记检测器通过检测定时标记之间的相位差来计数连续定时标记与写入时钟周期的小数部分之间的写入时钟周期的整数， 和参考信号。 所产生的定时误差被输出到写时钟补偿器。 写时钟能够产生相等间隔的初级相和主相之间的相位。 补偿器包括一个相位旋转器，用于控制哪个写入时钟相位被选择用于输出。 补偿器的相位寄存器中的值用于控制相位旋转器提前或延迟写时钟相位，并因此调整其频率和相位，以便同步写入数据块。

公开(公告)号：US20080304173A1

公开(公告)日：2008-12-11

申请号：US11759959

申请日：2007-06-08

申请人： Thomas R. Albrecht ,  David Timothy Flynn ,  Richard Leo Galbraith ,  Michael Anthony Moser ,  Bruce Alexander Wilson ,  Xiao Z. Wu

发明人： Thomas R. Albrecht ,  David Timothy Flynn ,  Richard Leo Galbraith ,  Michael Anthony Moser ,  Bruce Alexander Wilson ,  Xiao Z. Wu

IPC分类号： G11B5/09

CPC分类号： G11B5/09 ,  G11B5/746 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/1403 ,  G11B2020/1281 ,  G11B2220/2516

摘要： A system and method accurately clocks write data to the discrete data blocks in a patterned media disk drive. The precise time intervals between successive timing marks in the data tracks are measured by a timing mark detector that counts the integer number of write clock cycles between successive timing marks and the fractional part of a write clock cycle by detecting the phase difference between a timing mark and a reference signal. The resulting timing error is output to a write clock compensator. The write clock is capable of generating equally spaced primary phases and phases intermediate the primary phases. The compensator includes a phase rotator that controls which write clock phase is selected for output. The value in a phase register of the compensator is used to control the phase rotator to advance or retard the write clock phase, and thus to adjust its frequency and phase so as to be synchronized for writing to the data blocks.

摘要翻译： 系统和方法将写入数据精确地记录在图案化媒体盘驱动器中的离散数据块上。 通过定时标记检测器来测量数据轨道中连续定时标记之间的精确时间间隔，该定时标记检测器通过检测定时标记之间的相位差来计数连续定时标记与写入时钟周期的小数部分之间的写入时钟周期的整数， 和参考信号。 所产生的定时误差被输出到写时钟补偿器。 写时钟能够产生相等间隔的初级相和主相之间的相位。 补偿器包括一个相位旋转器，用于控制哪个写入时钟相位被选择用于输出。 补偿器的相位寄存器中的值用于控制相位旋转器提前或延迟写时钟相位，并因此调整其频率和相位，以便同步写入数据块。

公开(公告)号：US06995938B2

公开(公告)日：2006-02-07

申请号：US10841034

申请日：2004-05-06

申请人： Jonathan Darrel Coker ,  David Timothy Flynn ,  Richard Leo Galbraith

发明人： Jonathan Darrel Coker ,  David Timothy Flynn ,  Richard Leo Galbraith

IPC分类号： G11B5/596

CPC分类号： G11B5/59655 ,  G11B5/59605

摘要： A data recording system uses a recording medium in which the tracks have pseudo-noise (PN) sequences with good autocorrelation properties as servo information for controlling the position of the recording head. A first set of alternating tracks uses a leading pseudo-random binary sequence (PRBS), which is a PN sequence with good autocorrelation properties, and a following PRBS that is cyclically shifted from the leading PRBS. A second set of alternating tracks interleaved with the first set also has a leading PRBS and a following PRBS that is cyclically shifted from the leading PRBS, but the leading PRBS in each of the tracks in the second set is offset along-the-track from the leading PRBS in the tracks of the first set. The head positioning control system uses the leading PRBS to generate a servo timing mark (STM), the cyclic shift to generate track identification (TID), and the following PRBS from adjacent tracks to generate the head position error signal (PES).

摘要翻译： 数据记录系统使用其中轨道具有良好自相关特性的伪噪声（PN）序列的记录介质，作为用于控制记录头位置的伺服信息。 第一组交替轨道使用前导伪随机二进制序列（PRBS），其是具有良好自相关特性的PN序列，以及从前导PRBS循环移位的以下PRBS。 与第一组交织的第二组交替轨迹还具有前导PRBS和从前导PRBS循环移位的后续PRBS，但是第二组中的每个轨道中的前导PRBS沿着轨迹偏移 领先的PRBS在第一集的轨道。 头部定位控制系统使用前导PRBS来产生伺服定时标记（STM），循环移位以产生轨迹识别（TID），以及来自相邻轨道的后续PRBS以产生头部位置误差信号（PES）。

公开(公告)号：US5784010A

公开(公告)日：1998-07-21

申请号：US794718

申请日：1997-02-03

申请人： Jonathan Darrel Coker ,  David Timothy Flynn ,  Richard Leo Galbraith ,  Todd Carter Truax

发明人： Jonathan Darrel Coker ,  David Timothy Flynn ,  Richard Leo Galbraith ,  Todd Carter Truax

IPC分类号： G11B20/14 ,  H03M7/00

CPC分类号： G11B20/1426 ,  G11B2020/1434 ,  G11B2020/1446

摘要： A data encoding method and apparatus are provided for implementing a predefined rate code, such as a 16/17 rate code for a data detection channel in a direct access storage device. A binary data stream is received and sequential symbols of the received binary data stream are identified. Sequential alternate symbols of the binary data stream are encoded into first codewords. Sequential alternate other symbols are encoded into second codewords. The alternating first and second codewords are sequentially combined. For a rate 16/17 rate code, the first codewords include 9-bit codewords and the second codewords include 8-bit codewords. The second 8-bit codewords are either raw symbols of the received binary data stream or remapped symbols of the received binary data stream. All likely error events are limited to within three consecutive bytes in a user data stream with a 16/17 rate code of the preferred embodiment.

摘要翻译： 提供了一种数据编码方法和装置，用于实现诸如用于直接访问存储设备中的数据检测通道的16/17速率码的预定速率码。 接收二进制数据流，并识别所接收的二进制数据流的顺序符号。 二进制数据流的顺序替代符号被编码成第一码字。 顺序替代的其他符号被编码成第二码字。 交替的第一和第二码字被顺序组合。 对于速率16/17速率码，第一码字包括9位码字，第二码字包括8位码字。 第二个8位码字是接收的二进制数据流的原始符号或接收的二进制数据流的重新映射的符号。 所有可能的错误事件被限制在具有优选实施例的16/17速率代码的用户数据流中的三个连续字节内。

公开(公告)号：US07193800B2

公开(公告)日：2007-03-20

申请号：US10840819

申请日：2004-05-06

申请人： Jonathan Darrel Coker ,  David Timothy Flynn ,  Richard Leo Galbraith

发明人： Jonathan Darrel Coker ,  David Timothy Flynn ,  Richard Leo Galbraith

IPC分类号： G11B5/09

CPC分类号： G11B5/59633 ,  G11B5/59688

摘要： A data recording medium has tracks with pseudo-noise (PN) sequences with good autocorrelation properties as servo information for controlling the position of the recording head. A first set of alternating tracks uses a leading pseudo-random binary sequence (PRBS), which is a PN sequence with good autocorrelation properties, and a following PRBS that is cyclically shifted from the leading PRBS. A second set of alternating tracks interleaved with the first set also has a leading PRBS and a following PRBS that is cyclically shifted from the leading PRBS, but the leading PRBS in each of the tracks in the second set is offset along-the-track from the leading PRBS in the tracks of the first set. The head positioning control system uses the leading PRBS to generate a servo timing mark (STM), the cyclic shift to generate track identification (TID), and the following PRBS from adjacent tracks to generate the head position error signal (PES).

摘要翻译： 数据记录介质具有具有良好自相关特性的伪噪声（PN）序列的轨迹，作为用于控制记录头位置的伺服信息。 第一组交替轨道使用前导伪随机二进制序列（PRBS），其是具有良好自相关特性的PN序列，以及从前导PRBS循环移位的以下PRBS。 与第一组交织的第二组交替轨迹还具有前导PRBS和从前导PRBS循环移位的后续PRBS，但是第二组中的每个轨道中的前导PRBS沿着轨迹偏移 领先的PRBS在第一集的轨道。 头部定位控制系统使用前导PRBS来产生伺服定时标记（STM），循环移位以产生轨迹识别（TID），以及来自相邻轨道的后续PRBS以产生头部位置误差信号（PES）。

公开(公告)号：US09311942B2

公开(公告)日：2016-04-12

申请号：US12653874

申请日：2009-12-18

申请人： Jonathan Darrel Coker ,  David Timothy Flynn

发明人： Jonathan Darrel Coker ,  David Timothy Flynn

IPC分类号： G11B5/09 ,  G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59655

摘要： An embodiment of the present invention implements some or all major servo subfunctions for a storage device in integrated servo fields comprising sequences of encoded bits having selected mathematical properties. The integrated servo field is composed of a number of encoded sequences, which are members of a selected sequence set that is constrained to preferably provide some or all of the following functions: the Servo Track Mark (STM), the Position Error Signal (PES) and positional information such as the track-ID. The integrated servo fields can provide a Position Error Signal (PES) in relation to the center of a data track through the amplitude of the signal read for adjacent sequences. The servo system detects the sequences in the signal from the read head using a set of digital filters for the set of encoded sequences.

摘要翻译： 本发明的实施例在包括具有所选数学特性的编码比特序列的集成伺服字段中实现存储设备的一些或所有主要伺服子功能。 集成伺服字段由多个编码序列组成，编码序列是被选择的序列集合的成员，其被限制为优选地提供以下功能中的一些或全部：伺服轨迹标记（STM），位置误差信号（PES） 以及诸如轨道ID的位置信息。 集成的伺服字段可以通过相邻序列读取的信号的幅度来提供与数据轨道的中心相关的位置误差信号（PES）。 伺服系统使用一组编码序列的数字滤波器来检测来自读取头的信号中的序列。

公开(公告)号：US06175457B1

公开(公告)日：2001-01-16

申请号：US09167236

申请日：1998-10-06

申请人： David Timothy Flynn

发明人： David Timothy Flynn

IPC分类号： G11B509

CPC分类号： G11B5/012 ,  G11B5/09 ,  G11B20/10009 ,  G11B33/10

摘要： A method and apparatus are provided for dual polarity thermal asperity detection in a direct access storage device. A level threshold comparator receives a data signal from a data channel in the direct access storage device and compares sequential data samples of the data signal with a positive level threshold and a negative level threshold. Responsive to each identified consecutive data sample above the positive level threshold and responsive to each identified consecutive data sample less than the negative level threshold, a counter value is incremented. A count comparator compares the counter value with a predefined count threshold and identifies a thermal asperity event responsive to a counter value above the predefined count threshold.

摘要翻译： 提供了一种在直接存取存储装置中用于双极性热不平坦检测的方法和装置。 电平阈值比较器从直接访问存储装置中的数据信道接收数据信号，并将数据信号的顺序数据采样与正电平阈值和负电平阈值进行比较。 响应于高于正电平阈值的每个识别的连续数据样本并且响应于小于负电平阈值的每个识别的连续数据样本，增加计数器值。 计数比较器将计数器值与预定义的计数阈值进行比较，并且响应于高于预定义计数阈值的计数器值来识别热不平坦事件。

公开(公告)号：US6137643A

公开(公告)日：2000-10-24

申请号：US167050

申请日：1998-10-06

申请人： David Timothy Flynn

发明人： David Timothy Flynn

IPC分类号： G11B5/012 ,  G11B5/09 ,  G11B19/04 ,  G11B20/10 ,  G11B20/24 ,  G11B27/36 ,  G11B5/02

CPC分类号： G11B20/10009 ,  G11B19/04 ,  G11B20/24 ,  G11B27/36 ,  G11B2220/20 ,  G11B5/012 ,  G11B5/09

摘要： A method and apparatus are provided for thermal asperity detection in a direct access storage device. A data signal is received from a data channel in the direct access storage device. A level threshold comparator compares data samples of the data signal with a selected level threshold. Consecutive zero level data samples are detected. Responsive to each identified data sample above the selected level threshold and not an identified consecutive zero level data sample, a counter value is incremented. The counter value is compared with a predefined count threshold. A thermal asperity event is identified responsive to the counter value above the predefined count threshold.

摘要翻译： 提供了一种用于直接存取存储装置中的热不平坦检测的方法和装置。 从直接访问存储装置中的数据信道接收数据信号。 电平门限比较器将数据信号的数据样本与选定电平门限进行比较。 检测到连续零级数据样本。 响应于所选水平阈值之上的每个识别的数据样本，而不是所识别的连续零级数据样本，计数器值增加。 将计数器值与预定义的计数阈值进行比较。 响应于高于预定义计数阈值的计数器值来识别热不平坦事件。

公开(公告)号：US08422161B2

公开(公告)日：2013-04-16

申请号：US12653863

申请日：2009-12-18

申请人： Yuval Cassuto ,  Jonathan Darrel Coker ,  David Timothy Flynn

发明人： Yuval Cassuto ,  Jonathan Darrel Coker ,  David Timothy Flynn

IPC分类号： G11B5/596

CPC分类号： G11B5/59655 ,  G11B5/59688 ,  G11B20/1217 ,  G11B2020/1281 ,  G11B2020/1284 ,  G11B2220/2516

摘要： An embodiment of the present invention implements some or all major servo subfunctions for a storage device in integrated servo fields comprising sequences of encoded bits having selected mathematical properties. The integrated servo field is composed of a number of encoded sequences, which are members of a selected sequence set that is constrained to preferably provide some or all of the following functions: the Servo Track Mark (STM), the Position Error Signal (PES) and positional information such as the track-ID. In one embodiment the plurality sequences encoding a location identifier such as a track-ID are distributed across a set of servo wedges. A method of encoding the location identifier using a Chinese Remainder Theorem is described.

摘要翻译： 本发明的实施例在包括具有所选数学特性的编码比特序列的集成伺服字段中实现存储设备的一些或所有主要伺服子功能。 集成伺服字段由多个编码序列组成，编码序列是被选择的序列集合的成员，其被限制为优选地提供以下功能中的一些或全部：伺服轨迹标记（STM），位置误差信号（PES） 以及诸如轨道ID的位置信息。 在一个实施例中，编码诸如轨道ID的位置标识符的多个序列分布在一组伺服楔块上。 描述了使用中国剩余定理对位置标识符进行编码的方法。

公开(公告)号：US20110149434A1

公开(公告)日：2011-06-23

申请号：US12653874

申请日：2009-12-18

申请人： Jonathan Darrel Coker ,  David Timothy Flynn

发明人： Jonathan Darrel Coker ,  David Timothy Flynn

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59655

摘要： An embodiment of the present invention implements some or all major servo subfunctions for a storage device in integrated servo fields comprising sequences of encoded bits having selected mathematical properties. The integrated servo field is composed of a number of encoded sequences, which are members of a selected sequence set that is constrained to preferably provide some or all of the following functions: the Servo Track Mark (STM), the Position Error Signal (PES) and positional information such as the track-ID. The integrated servo fields can provide a Position Error Signal (PES) in relation to the center of a data track through the amplitude of the signal read for adjacent sequences. The servo system detects the sequences in the signal from the read head using a set of digital filters for the set of encoded sequences.

摘要翻译： 本发明的实施例在包括具有所选数学特性的编码比特序列的集成伺服字段中实现存储设备的一些或所有主要伺服子功能。 集成伺服字段由多个编码序列组成，编码序列是被选择的序列集合的成员，其被限制为优选地提供以下功能中的一些或全部：伺服轨迹标记（STM），位置误差信号（PES） 以及诸如轨道ID的位置信息。 集成的伺服字段可以通过相邻序列读取的信号的幅度来提供与数据轨道的中心相关的位置误差信号（PES）。 伺服系统使用一组编码序列的数字滤波器来检测来自读取头的信号中的序列。