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1. 发明申请

US20090316296A1 SERVO CONTROL IN TAPE DRIVES 有权
标题翻译：磁带驱动器中的伺服控制
公开(公告)号：US20090316296A1
公开(公告)日：2009-12-24
申请号：US12487252
申请日：2009-06-18
申请人： Giovanni Cherubini , Jens Jelito , Mark Alfred Lantz
发明人： Giovanni Cherubini , Jens Jelito , Mark Alfred Lantz
IPC分类号： G11B5/584 , G11B20/20
CPC分类号： G11B5/58 , G11B5/596 , G11B15/093 , G11B15/43
摘要： Servo control methods and apparatus for a tape drive. A read/write head reads and writes data on magnetic tape with at least one servo track providing transverse position information. At least two servo readers arranged for reading a servo track associated with the read/write head operate concurrently to generate servo read signals. A position estimator processes each servo read signal to generate a series of position values corresponding to respective time instants indicative of their transverse positions. A servo controller calculates a skew value indicative of tape skew relative to the read/write head and a tension variation value indicative of variation of tape tension. The servo controller is adapted to account for cross-coupling between tape skew and tension variation.
摘要翻译：磁带机的伺服控制方法和装置。读/写头在磁带上读写数据，其中至少有一个提供横向位置信息的伺服轨迹。至少两个用于读取与读/写头相关联的伺服磁道的伺服读取器同时运行以产生伺服读信号。位置估计器处理每个伺服读取信号以产生对应于指示其横向位置的各个时刻的一系列位置值。伺服控制器计算指示相对于读/写头的磁带歪斜的偏斜值和表示磁带张力变化的张力变化值。伺服控制器适用于考虑磁带偏斜和张力变化之间的交叉耦合。

2. 发明授权

US08054568B2 Synchronization of symmetric timing based servo bursts 有权
标题翻译：基于对称定时的伺服脉冲串同步
公开(公告)号：US08054568B2
公开(公告)日：2011-11-08
申请号：US12712039
申请日：2010-02-24
申请人： Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto , Mark Alfred Lantz
发明人： Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto , Mark Alfred Lantz
IPC分类号： G11B5/09 , G11B5/584
CPC分类号： G11B5/584 , G11B5/09
摘要： 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.
摘要翻译：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目的伺服条带对称。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。

3. 发明授权

US07876521B2 Servo control in tape drives 有权
标题翻译：磁带驱动器中的伺服控制
公开(公告)号：US07876521B2
公开(公告)日：2011-01-25
申请号：US12487252
申请日：2009-06-18
申请人： Giovanni Cherubini , Jens Jelitto , Mark Alfred Lantz
发明人： Giovanni Cherubini , Jens Jelitto , Mark Alfred Lantz
IPC分类号： G11B17/00 , G11B5/584 , G11B20/20
CPC分类号： G11B5/58 , G11B5/596 , G11B15/093 , G11B15/43
摘要： Servo control methods and apparatus for a tape drive. A read/write head reads and writes data on magnetic tape with at least one servo track providing transverse position information. At least two servo readers arranged for reading a servo track associated with the read/write head operate concurrently to generate servo read signals. A position estimator processes each servo read signal to generate a series of position values corresponding to respective time instants indicative of their transverse positions. A servo controller calculates a skew value indicative of tape skew relative to the read/write head and a tension variation value indicative of variation of tape tension. The servo controller is adapted to account for cross-coupling between tape skew and tension variation.
摘要翻译：磁带机的伺服控制方法和装置。读/写头在磁带上读写数据，其中至少有一个提供横向位置信息的伺服轨迹。至少两个用于读取与读/写头相关联的伺服磁道的伺服读取器同时运行以产生伺服读信号。位置估计器处理每个伺服读取信号以产生对应于指示其横向位置的各个时刻的一系列位置值。伺服控制器计算指示相对于读/写头的磁带歪斜的偏斜值和表示磁带张力变化的张力变化值。伺服控制器适用于考虑磁带偏斜和张力变化之间的交叉耦合。

4. 发明授权

US09274944B2 Wear leveling 有权
标题翻译：磨损平整
公开(公告)号：US09274944B2
公开(公告)日：2016-03-01
申请号：US13597861
申请日：2012-08-29
申请人： Giovanni Cherubini , Ilias Iliadis
发明人： Giovanni Cherubini , Ilias Iliadis
IPC分类号： G06F12/02
CPC分类号： G06F12/0246 , G06F2212/7211
摘要： A method for operating a computer memory and a storage device. The memory is organized to store data in units of such memory. For each unit of a set of units a wear level of the unit is determined. A maximum wear level among the wear levels is determined. A suggestion of a subset of one or more units for being selected for data erasure is received and at least one unit in the subset is identified for subsequent data erasure, a wear level (c(i)) of which units (i) is less than the maximum wear level (c_max).
摘要翻译：一种用于操作计算机存储器和存储装置的方法。存储器被组织以以这种存储器的单元存储数据。对于一组单元的每个单元，确定单元的磨损水平。确定磨损水平之间的最大磨损水平。接收用于被选择用于数据擦除的一个或多个单元的子集的建议，并且识别子集中的至少一个单元用于随后的数据擦除，其中单元（i）的磨损水平（c（i））较小超过最大磨损水平（c_max）。

5. 发明授权

US08760795B2 Linear recording tape with a reduced servo band width, and system and method for using the same 失效
标题翻译：具有减小的伺服带宽的线性记录带，以及使用该记录带的系统和方法
公开(公告)号：US08760795B2
公开(公告)日：2014-06-24
申请号：US13080542
申请日：2011-04-05
申请人： Giovanni Cherubini , Jens Jelitto , Mark A. Lantz
发明人： Giovanni Cherubini , Jens Jelitto , Mark A. Lantz
IPC分类号： G11B5/584
CPC分类号： G11B5/584 , G11B20/1201
摘要： In one embodiment, a linear magnetic recording tape includes at least one servo band having a servo pattern readable by a servo reader of a magnetic head for positioning thereof, wherein the servo pattern is adapted to substantially fill a width b of the servo band, the servo band width h is less than or equal to about 1.2 B/N, N is an integer greater than or equal to 2, and B corresponds to a distance between data read/write transducers of the magnetic head in a direction transverse to a longitudinal length of the tape. In another embodiment, a method includes providing the linear magnetic recording tape, formatting the tape, and positioning the magnetic head within a first lateral tape region. Other linear magnetic tapes, systems, and methods are described according to other embodiments.
摘要翻译：在一个实施例中，线性磁记录带包括至少一个具有由磁头的伺服读取器可读取的伺服模式的伺服带，用于定位它，其中伺服模式适于基本上填充伺服带的宽度b，伺服带宽h小于或等于约1.2B / N，N是大于或等于2的整数，B对应于磁头的数据读/写换能器在横向于纵向的方向上的距离磁带长度。在另一个实施例中，一种方法包括提供线性磁记录带，格式化带，以及将磁头定位在第一侧带区域内。根据其他实施例描述其它线性磁带，系统和方法。

6. 发明授权

US08576510B2 Robust metric computation of longitudinal position (LPOS) data symbol detection 有权
标题翻译：纵向位置（LPOS）数据符号检测的鲁棒度量计算
公开(公告)号：US08576510B2
公开(公告)日：2013-11-05
申请号：US13267837
申请日：2011-10-06
申请人： Giovanni Cherubini , Jens Jelitto , Robert A. Hutchins
发明人： Giovanni Cherubini , Jens Jelitto , Robert A. Hutchins
IPC分类号： G11B5/584
CPC分类号： G11B20/1202 , G11B5/584 , G11B20/10231 , G11B20/10287 , G11B20/1201 , G11B2020/1281 , G11B2220/90 , G11B2220/93 , G11B2220/956
摘要： In one embodiment, a tape drive system includes a magnetic head having a servo sensor for sensing a defined servo track of a magnetic tape and configured to read servo pulses from servo bursts of the servo track while the magnetic tape is moving past the magnetic head with the servo bursts representing an encoded data symbol, an analog-to-digital converter configured to provide a sequence of samples of the readback servo signal, a digital correlator configured to compute a correlation signal between the sequence and a reference waveform, a timing reference module configured to provide a reference timing model having interpolation instants to the digital correlator, a correlation interpolator configured to interpolate the correlation signal at the interpolation instants and compute a longitudinal position (LPOS) detection metric, and an LPOS detector configured to decode the encoded data symbol of the servo bursts using the computed LPOS detection metric.
摘要翻译：在一个实施例中，磁带驱动系统包括具有伺服传感器的磁头，该伺服传感器用于感测磁带的定义的伺服磁道并且被配置为在磁带通过磁头移动经过磁头的同时从伺服磁道的伺服脉冲串读取伺服脉冲，表示编码数据符号的伺服突发，被配置为提供所述回读伺服信号的采样序列的模数转换器，被配置为计算所述序列与参考波形之间的相关信号的数字相关器，定时参考模块被配置为向所述数字相关器提供具有内插时刻的参考定时模型，相关内插器，被配置为在所述内插时刻内插所述相关信号并计算纵向位置（LPOS）检测度量，以及LPOS检测器，被配置为对所述编码数据符号的伺服脉冲串使用计算的LPOS检测度量。

7. 发明授权

US08422163B2 Determining a reference waveform used by a correlator in a servo channel 失效
标题翻译：确定相关器在伺服通道中使用的参考波形
公开(公告)号：US08422163B2
公开(公告)日：2013-04-16
申请号：US13456895
申请日：2012-04-26
申请人： Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto
发明人： Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto
IPC分类号： G11B5/584
CPC分类号： G11B20/1201 , G11B5/00821 , G11B5/584 , G11B20/10037 , G11B2020/1281 , G11B2020/1484 , G11B2220/913 , G11B2220/953 , G11B2220/956
摘要： Provided are a method, servo channel, and tape drive for determining a reference waveform used by a correlator in a servo channel. Sequences of servo signal samples are provided from read servo signals read from a servo pattern on a recording medium. A determination is made of a reference waveform based on the sequences of servo signal samples and the reference waveform is forwarded. Interpolated servo signals are generated. The interpolated servo signal samples and the forwarded reference waveform are received to generate correlation output samples. Position and velocity information are calculated from the correlation output samples.
摘要翻译：提供了一种用于确定由伺服通道中的相关器使用的参考波形的方法，伺服通道和磁带驱动器。伺服信号样本的序列由从记录介质上的伺服模式读取的读取伺服信号提供。基于伺服信号样本的序列确定参考波形，并且转发参考波形。产生内插伺服信号。接收内插伺服信号采样和转发的参考波形以产生相关输出采样。从相关输出样本计算位置和速度信息。

8. 发明授权

US08331055B2 Control method and apparatus for a dual-channel weighted LPOS combining scheme 有权
标题翻译：双通道加权LPOS组合方案的控制方法和装置
公开(公告)号：US08331055B2
公开(公告)日：2012-12-11
申请号：US12500490
申请日：2009-07-09
申请人： Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto , Melanie Jean Sandberg
发明人： Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto , Melanie Jean Sandberg
IPC分类号： G11B21/02
CPC分类号： G11B5/584 , G11B5/29
摘要： 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.
摘要翻译：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），以及跨越读/写头移动包括多个伺服带的顺序信息存储介质包括相应的多个伺服传感器。如果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，如果解码了新的LPOS位，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，则该方法确定与所述断言获取标志相关联的伺服信道是否标志位标志，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。

9. 发明授权

US08169736B2 Method and apparatus to position a head module comprising servo elements and a plurality of data elements 有权
标题翻译：用于定位包括伺服元件和多个数据元素的头模块的方法和装置
公开(公告)号：US08169736B2
公开(公告)日：2012-05-01
申请号：US12505435
申请日：2009-07-17
申请人： Nhan Xuan Bui , Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan Xuan Bui , Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto , Kazuhiro Tsuruta
IPC分类号： G11B5/584 , G11B21/02 , G11B15/46
CPC分类号： G11B5/5552
摘要： A method to position a head module, where the head module comprises at least one servo element and a plurality of data elements, where the servo element and each of the plurality of data elements can detect a servo signal, wherein the method includes moving a sequential information storage medium having a servo band encoded therein across the head module and detecting the servo band using the at least one servo element or any one of the plurality of data elements.
摘要翻译：一种定位头模块的方法，其中头模块包括至少一个伺服元件和多个数据元件，其中伺服元件和多个数据元素中的每一个可以检测伺服信号，其中该方法包括移动顺序信息存储介质，其中跨越所述头模块编码了伺服频带，并且使用所述至少一个伺服单元或所述多个数据单元中的任何一个来检测所述伺服频带。

10. 发明申请

US20110176237A1 MAGNETIC TAPE SERVO FORMAT ALLOWING FOR INCREASED LINEAR TAPE DENSITY AND SYSTEMS THEREOF 有权
标题翻译：具有增加线性带密度的磁带服务器格式及其系统
公开(公告)号：US20110176237A1
公开(公告)日：2011-07-21
申请号：US12691604
申请日：2010-01-21
申请人： Nhan X. Bui , Giovanni Cherubini , Evangelos S. Eleftheriou , Reed A. Hancock , Robert A. Hutchins
发明人： Nhan X. Bui , Giovanni Cherubini , Evangelos S. Eleftheriou , Reed A. Hancock , Robert A. Hutchins
IPC分类号： G11B5/09 , G11B17/00
CPC分类号： G11B21/103 , G11B5/584 , G11B15/18
摘要： According to one embodiment, a magnetic recording tape includes a plurality of servo tracks, each servo track comprising a series of magnetically defined bars having an average height of between about 80 microns and about 120 microns, wherein an average stripe angle of the bars is between about 10° and about 25°. A stripe angle is measured between a longitudinal axis of each respective bar and a line oriented perpendicular to a direction of tape travel and parallel to a plane of the tape, wherein an average stripe width of the bars is between about 1.0 micron and about 2.2 microns and an average servo frame length of groups of the bars comprising a servo frame is between about 120 microns and about 180 microns. In more embodiments, a servo format and a system including a servo format are disclosed, along with other embodiments of magnetic tapes.
摘要翻译：根据一个实施例，磁记录带包括多个伺服轨道，每个伺服轨道包括一系列具有介于约80微米与约120微米之间的平均高度的磁力限定的杆，其中杆的平均条纹角在约10°和约25°。在每个相应的条的纵向轴线和垂直于带行进方向并且平行于带的平面定向的线之间测量条纹角度，其中条的平均条纹宽度在约1.0微米至约2.2微米之间并且包括伺服框架的杆的组的平均伺服框架长度在大约120微米和大约180微米之间。在更多实施例中，公开了伺服格式和包括伺服格式的系统以及磁带的其他实施例。

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