公开(公告)号：WO2011077340A1

公开(公告)日：2011-06-30

申请号：PCT/IB2010/055909

申请日：2010-12-17

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  CHERUBINI, Giovanni ,  JELITTO, Jens ,  PANTAZI, Angeliki

Inventor： CHERUBINI, Giovanni ,  JELITTO, Jens ,  PANTAZI, Angeliki

IPC: G11B5/56

CPC classification number: G11B5/56

Abstract: Method for operating a storage device with a tape (TP) and a head (HU) which is operable to read and/or write data from and respectively to the tape (TP). The tape (TP) is moveable in a predetermined longitudinal direction (X). At least two consecutive current lateral tape positions (y x (t1), y x (t 2 )) of the tape (TP) with respect to a predetermined reference point (REF) are determined at a predetermined longitudinal capture position. A tape skew ( θ ) of the tape (TP) is determined dependent on the at least two determined lateral positions (y x (t1), y x (t 2 )). The tape skew ( θ ) represents an angle between a current tape motion direction (TMD) of the tape (TP) and the longitudinal direction (X). A skew control signal ( U ∂ ) is determined dependent on the determined tape skew ( θ ). A rotational head position ( ∂) of the head (HU) is controlled dependent on the skew control signal ( U ∂ ) to align the head (HU) to the current tape motion direction (TMD) in such a way that the head (HU) is operable to read and/or write data.

Abstract translation: 用于使用可操作以从磁带（TP）读取和/或写入数据的磁带（TP）和磁头（HE）来操作存储设备的方法。 带（TP）可在预定的纵向方向（X）上移动。 在预定的纵向捕获位置确定带（TP）相对于预定参考点（REF）的至少两个连续的当前横向带位置（yx（t1），yx（t2））。 取决于至少两个确定的横向位置（yx（t1），yx（t2））来确定带（TP）的带偏移（α）。 带偏移（λ）表示带（TP）的当前带移动方向（TMD）与纵向方向（X）之间的角度。 取决于确定的磁带倾斜（θ）来确定偏斜控制信号（U'）。 头部（HU）的旋转头位置（θ）根据偏斜控制信号（U0）来控制，以使头部（HU）与当前带子运动方向（TMD）对准，使头部（HU） ）可用于读取和/或写入数据。

公开(公告)号：WO2011104050A2

公开(公告)日：2011-09-01

申请号：PCT/EP2011050674

申请日：2011-01-19

Applicant: IBM ,  CHERUBINI GIOVANNI ,  JELITTO JENS ,  LANTZ MARK ALFRED ,  HUTCHINS ROBERT ALLEN

Inventor： CHERUBINI GIOVANNI ,  JELITTO JENS ,  LANTZ MARK ALFRED ,  HUTCHINS ROBERT ALLEN

CPC classification number: G11B5/584 ,  G11B5/09

Abstract: Timing based servo bursts of servo frames, in which the frames are arranged to be symmetric with the same number of servo stripes in each burst of a frame, are synchronized by shifting selected bits. For example, servo frames are arranged with four servo bursts with an equal number of servo stripes in each burst, the servo frames comprising two symmetric sub-frames, each sub-frame comprising two bursts of servo stripes that are parallel to each other within a burst, and the bursts are non-parallel with respect to each other; each servo burst is arranged to comprise at least one reference servo stripe; and each servo burst is arranged to comprise at least one shifted servo stripe, wherein the shift is in the same longitudinal direction with respect to at least one reference servo stripe for each burst of a frame and the opposite longitudinal direction for bursts of sequentially adjacent frames.

Abstract translation: 伺服帧的基于时序的伺服脉冲串通过移位所选位来同步，其中帧被布置为在帧的每个突发中具有相同数量的伺服条带对称。 例如，伺服帧被布置成具有在每个突发中具有相等数量的伺服条带的四个伺服脉冲串，伺服帧包括两个对称子帧，每个子帧包括在一个内部的彼此平行的两个脉冲串的伺服条带 突发，并且突发是相互不平行的; 每个伺服脉冲串被布置成包括至少一个参考伺服条纹; 并且每个伺服脉冲串被布置成包括至少一个移位的伺服条带，其中相对于帧的每个脉冲串相对于至少一个参考伺服条带的移位在相同的纵向方向上，并且相反的纵向方向用于顺序相邻帧的突发 。

公开(公告)号：WO2011003677A1

公开(公告)日：2011-01-13

申请号：PCT/EP2010/057678

申请日：2010-06-02

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  JELITTO, Jens ,  CHERUBINI, Giovanni ,  HUTCHINS, Robert, Allen ,  SANDBERG, Melanie, Jean

Inventor： JELITTO, Jens ,  CHERUBINI, Giovanni ,  HUTCHINS, Robert, Allen ,  SANDBERG, Melanie, Jean

IPC: G11B5/584

CPC classification number: G11B5/584 ,  G11B5/29

Abstract: A method for monitoring a plurality of servo channels, providing a finite state machine ("FSM") comprising a single servo channel mode and a combined servo channel mode, and moving a sequential information storage medium comprising a plurality of servo bands across a read/write head comprising a corresponding plurality of servo sensors. The method further asserts an acquisition flag by a servo channel if that servo channel is tracking a servo pattern, and asserts a bit flag by a servo channel if a new LPOS bit is decoded. If at least one acquisition flag is asserted, the method determines if a bit flag is asserted by a servo channel associated with said asserted acquisition flag, and if an acquisition flag and a bit flag are asserted by a servo channel, the method determines a relative positioning of each servo sensor with respect to an associated servo pattern.

Abstract translation: 一种用于监视多个伺服信道的方法，提供包括单个伺服信道模式和组合伺服信道模式的有限状态机（“FSM”），并且将包括多个伺服带的顺序信息存储介质跨越读/ 写头包括相应的多个伺服传感器。 如果该伺服信道正在跟踪伺服模式，则该方法还通过伺服信道断言采集标志，并且如果新的LPOS位被解码，则通过伺服信道断言位标志。 如果至少一个采集标志被断言，则该方法确定是否通过与所述断言采集标志相关联的伺服信道确定位标志，并且如果通过伺服信道确定获取标志和位标志，则该方法确定相对 每个伺服传感器相对于相关伺服模式的定位。

公开(公告)号：WO2009153740A2

公开(公告)日：2009-12-23

申请号：PCT/IB2009/052577

申请日：2009-06-17

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  CHERUBINI, Giovanni ,  JELITTO, Jens ,  LANTZ, Mark A.

Inventor： CHERUBINI, Giovanni ,  JELITTO, Jens ,  LANTZ, Mark A.

IPC: G11B15/00

CPC classification number: G11B5/58 ,  G11B5/596 ,  G11B15/093 ,  G11B15/43

Abstract: Servo control methods and apparatus are provided for a tape drive (1) where a read/write head (2) reads and writes data on magnetic tape (3) with at least one servo track for providing transversal position information. At least two servo readers (S) are associated with the read/write head (2), each arranged for reading a said servo track during read/write operations. The servo readers (S) are operative concurrently to generate respective servo read signals (r). A position estimator (8) processes each servo read signal (r) to generate a series of position values, corresponding to respective time instants, indicative of transversal position of the associated servo reader (S). A servo controller (10) calculates from the position values and time instants a skew value (θ), indicative of tape skew relative to the read/write head (2), and a tension variation value (AT) indicative of variation of tape tension from a reference value. The servo controller (10) is adapted to account for cross-coupling between tape skew and tension variation in the joint calculation of the skew and tension variation values. Where three servo readers (S) are operative concurrently, the servo controller (10) can be adapted to account for time dependency of tape skew and tension variation and to calculate respective time derivatives (θ\ AT') for the skew and tension variation values (θ, AT). The calculated values can then be used to make compensatory adjustments to tape tension and tape skew relative to the read/write head (2).

Abstract translation: 为磁带驱动器（1）提供伺服控制方法和装置，其中读/写磁头（2）用至少一个用于提供横向位置信息的伺服磁道读取和写入磁带（3）上的数据。 至少两个伺服读取器（S）与读/写头（2）相关联，每个伺服读取器（S）被布置用于在读/写操作期间读取所述伺服轨道。 伺服读取器（S）同时工作以产生相应的伺服读取信号（r）。 位置估计器（8）处理每个伺服读取信号（r）以产生指示相关伺服读取器（S）的横向位置的对应于各个时刻的一系列位置值。 伺服控制器（10）根据位置值和时刻计算指示相对于读/写头（2）的磁带偏斜的偏斜值（θ）和指示磁带张力变化的张力变化值（AT） 从参考值。 伺服控制器（10）适于考虑歪斜和张力变化值的联合计算中的带偏斜和张力变化之间的交叉耦合。 在三个伺服读取器（S）同时操作的情况下，伺服控制器（10）可以适应于考虑到磁带歪斜和张力变化的时间依赖性，并且计算歪斜和张力变化值的相应时间导数（Δ\ AT'） （？， 在）。 然后，计算的值可用于对磁带张力和相对于读/写磁头（2）的磁带歪斜进行补偿性调整。

公开(公告)号：WO03021592A8

公开(公告)日：2003-06-05

申请号：PCT/IB0202828

申请日：2002-07-19

Applicant: IBM ,  BAECHTOLD PETER ,  BINNIG GERD K ,  CHERUBINI GIOVANNI ,  DHOLAKIA AJAY ,  DUERIG URS T ,  ELEFTHERIOU EVANGELOS S ,  LOELIGER THEODOR W ,  VETTIGER PETER

Inventor： BAECHTOLD PETER ,  BINNIG GERD K ,  CHERUBINI GIOVANNI ,  DHOLAKIA AJAY ,  DUERIG URS T ,  ELEFTHERIOU EVANGELOS S ,  LOELIGER THEODOR W ,  VETTIGER PETER

IPC: G11B9/00 ,  G11B9/14 ,  G11B20/10 ,  G11B20/18

CPC classification number: B82Y10/00 ,  G11B9/04 ,  G11B9/14 ,  G11B20/18 ,  G11B2005/0021

Abstract: Apparatus for detecting data in a sensor signal generated by a read sensor in a local probe data storage device comprises a differentiation for subtracting a value of the sensor signal from the succeeding value of the sensor signal to generate a ternary difference signal ; and a convertor connected to the differentiator for converting the difference signal into a binary output signal indicative of the detected data. A local probe data storage device comprising such apparatus is also described.

Abstract translation: 用于检测由本地探针数据存储装置中的读取传感器生成的传感器信号中的数据的设备包括：差分，用于从传感器信号的后继值中减去传感器信号的值以生成三态差分信号; 以及连接到差分器的转换器，用于将差分信号转换为表示检测数据的二进制输出信号。 还描述了包括这种设备的本地探测器数据存储设备。

公开(公告)号：WO2003021592A2

公开(公告)日：2003-03-13

申请号：PCT/IB2002/002828

申请日：2002-07-19

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  BÄCHTOLD, Peter ,  BINNIG, Gerd, K. ,  CHERUBINI, Giovanni ,  DHOLAKIA, Ajay ,  DÜRIG, Urs, T. ,  ELEFTHERIOU, Evangelos, S. ,  LOELIGER, Theodor, W. ,  VETTIGER, Peter

Inventor： BÄCHTOLD, Peter ,  BINNIG, Gerd, K. ,  CHERUBINI, Giovanni ,  DHOLAKIA, Ajay ,  DÜRIG, Urs, T. ,  ELEFTHERIOU, Evangelos, S. ,  LOELIGER, Theodor, W. ,  VETTIGER, Peter

IPC: G11B9/14

CPC classification number: B82Y10/00 ,  G11B9/04 ,  G11B9/14 ,  G11B20/18 ,  G11B2005/0021

Abstract: Apparatus for detecting data in a sensor signal generated by a read sensor in a local probe data storage device comprises a differentiation for subtracting a value of the sensor signal from the succeeding value of the sensor signal to generate a ternary difference signal ; and a convertor connected to the differentiator for converting the difference signal into a binary output signal indicative of the detected data. A local probe data storage device comprising such apparatus is also described.

Abstract translation: 用于检测由本地探头数据存储装置中的读取传感器产生的传感器信号中的数据的装置包括从传感器信号的后续值减去传感器信号的值以产生三进制差分信号的区别; 以及连接到微分器的转换器，用于将差分信号转换成指示检测到的数据的二进制输出信号。 还描述了包括这种装置的本地探测数据存储装置。

公开(公告)号：WO1996020551A1

公开(公告)日：1996-07-04

申请号：PCT/EP1994004332

申请日：1994-12-28

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  CHERUBINI, Giovanni ,  OELCER, Sedat ,  UNGERBOECK, Gottfried

Inventor： INTERNATIONAL BUSINESS MACHINES CORPORATION

IPC: H04L25/03

CPC classification number: H04L25/0305 ,  H04L25/497 ,  H04L2025/03662

Abstract: In a receiver for signals in a multilevel partial response class-IV communication system, the coefficients of a digital adaptive equalizer need to be updated to minimize the error due to noise and signal distortion. After initial convergence of the equalizer coefficients to near-optimum settings, an estimate of the mean-square error gradient for coefficient updating can be obtained in decision-directed mode from an estimate of the error signal. In the absence of a reference signal, initial convergence must be achieved in self-training mode. The decision-directed error signal is then replaced by a pseudo-error signal for the computation of an approximation of the mean-square error gradient. The invention provides a particular self-training procedure which outperforms known methods in terms of speed of convergence and achieved mean-square error values, and does not require timing recovery prior to equalizer convergence.

Abstract translation: 在用于多电平部分响应类IV通信系统中的信号的接收机中，需要更新数字自适应均衡器的系数以将由于噪声和信号失真引起的误差最小化。 在均衡器系数初始收敛到接近最优设置之后，可以从误差信号的估计中，在决策模式中获得用于系数更新的均方误差梯度的估计。 在没有参考信号的情况下，必须在自训练模式下实现初始收敛。 然后，由用于计算均方误差梯度的近似的伪误差信号替换决策导向误差信号。 本发明提供了一种在收敛速度方面优于已知方法并实现均方误差值的特定自训练程序，并且不需要在均衡器收敛之前进行定时恢复。

公开(公告)号：WO2011104050A3

公开(公告)日：2011-09-01

申请号：PCT/EP2011/050674

申请日：2011-01-19

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  CHERUBINI, Giovanni ,  JELITTO, Jens ,  LANTZ, Mark, Alfred ,  HUTCHINS, Robert, Allen

Inventor： CHERUBINI, Giovanni ,  JELITTO, Jens ,  LANTZ, Mark, Alfred ,  HUTCHINS, Robert, Allen

IPC: G11B5/584

Abstract: Timing based servo bursts of servo frames, in which the frames are arranged to be symmetric with the same number of servo stripes in each burst of a frame, are synchronized by shifting selected bits. For example, servo frames are arranged with four servo bursts with an equal number of servo stripes in each burst, the servo frames comprising two symmetric sub-frames, each sub-frame comprising two bursts of servo stripes that are parallel to each other within a burst, and the bursts are non-parallel with respect to each other; each servo burst is arranged to comprise at least one reference servo stripe; and each servo burst is arranged to comprise at least one shifted servo stripe, wherein the shift is in the same longitudinal direction with respect to at least one reference servo stripe for each burst of a frame and the opposite longitudinal direction for bursts of sequentially adjacent frames.

Abstract translation: 基于时间的伺服帧的伺服脉冲串通过移动选择的位而同步，其中帧被布置为在帧的每个脉冲串中具有相同数量的伺服条带对称。 例如，伺服帧被安排为具有在每个脉冲串中具有相同数量的伺服条纹的四个伺服脉冲串，伺服帧包括两个对称子帧，每个子帧包括两个伺服条纹脉冲串，这两个伺服条纹脉冲彼此平行 爆发，并且爆发相互之间不平行; 每个伺服脉冲串被安排成包括至少一个参考伺服条带; 并且每个伺服脉冲串被布置为包括至少一个移位的伺服条带，其中，对于帧的每个脉冲串，相对于至少一个参考伺服条带，以及对于顺序相邻帧的脉冲串的相反纵向方向，移位在相同的纵向方向上

公开(公告)号：WO2009136374A3

公开(公告)日：2009-12-30

申请号：PCT/IB2009051882

申请日：2009-05-07

Applicant: IBM ,  CHERUBINI GIOVANNI ,  CIDECIYAN ROY D ,  ELEFTHERIOU EVANGELOS S ,  JELITTO JENS ,  LANTZ MARK A

Inventor： CHERUBINI GIOVANNI ,  CIDECIYAN ROY D ,  ELEFTHERIOU EVANGELOS S ,  JELITTO JENS ,  LANTZ MARK A

IPC: G11B5/584 ,  G11B21/10

CPC classification number: G11B5/584

Abstract: A servo write head is provided and is configured to simultaneously write at least two servo patterns in respective servo bands on linear magnetic tape. Centerlines of the servo patterns are substantially uniformly spaced in the lateral direction. In addition, the servo patterns of all adjacent respective servo bands are displaced relative to each other in a longitudinal direction by an amount that is related to a length of a servo frame and a type of the servo patterns.

Abstract translation: 伺服写入头被提供并被配置为在线性磁带上的相应伺服带中同时写入至少两个伺服模式。 伺服图案的中心线在横向上基本均匀地间隔开。 另外，所有相邻的各个伺服带的伺服图案在纵向上相对于彼此移位与伺服帧的长度和伺服图案的类型有关的量。

公开(公告)号：WO2009153702A1

公开(公告)日：2009-12-23

申请号：PCT/IB2009/052440

申请日：2009-06-09

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  CHERUBINI, Giovanni ,  CIDECIYAN, Roy D. ,  ELEFTHERIOU, Evangelos S. ,  JELITTO, Jens

Inventor： CHERUBINI, Giovanni ,  CIDECIYAN, Roy D. ,  ELEFTHERIOU, Evangelos S. ,  JELITTO, Jens

IPC: G11B5/584

CPC classification number: G11B5/584

Abstract: Methods and apparatus are provided for detecting L-bit sync words occurring at N-bit intervals in PPM-encoded servo pattern read signals read from magnetic tape (3) in tape drives (1). A soft output detector (11) processes the PPM-encoded servo pattern read signal to produce a series of soft output samples corresponding to respective bits encoded in the servo pattern. A sync word detector (12) then produces block correlation values for respective positions of a sliding L-sample block in the soft output sample series. The block correlation values are produced by calculating, at each block position, bit correlation values indicating correlation between respective samples and corresponding bits of the sync word, and summing each bit correlation value minus a predetermined function of the corresponding sample value. The sync word detector (12) then detects a sync word at the block position with the maximum block correlation value in an (N+L-1)-sample sequence of the soft output sample series.

Abstract translation: 提供了用于检测在磁带驱动器（1）中从磁带（3）读取的PPM编码的伺服模式读取信号中以N位间隔发生的L位同步字的方法和装置。 软输出检测器（11）处理PPM编码的伺服模式读取信号以产生对应于在伺服模式中编码的各个位的一系列软输出采样。 同步字检测器（12）然后产生软输出采样序列中的滑动L样本块的相应位置的块相关值。 通过在每个块位置计算指示各个采样和同步字的对应位之间的相关性并将每个位相关值减去相应采样值的预定函数的相加值来产生块相关值。 然后，同步字检测器（12）在软输出采样序列的（N + L-1） - 采样序列中检测具有最大块相关值的块位置处的同步字。