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1. 发明授权

US5973870A Adaptive and in-situ load/unload damage estimation and compensation 失效
标题翻译：自适应和原位装载/卸载损伤估计和补偿
公开(公告)号：US5973870A
公开(公告)日：1999-10-26
申请号：US762509
申请日：1996-12-10
申请人： Zine-Eddine Boutaghou , Hal Hjalmar Ottesen , Gordon James Smith
发明人： Zine-Eddine Boutaghou , Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B19/04 , G06F11/00 , G11B5/09 , G11B5/54 , G11B20/18 , G11B21/02 , G11B21/12 , G11B21/22
CPC分类号： G11B5/54 , G11B19/04 , G11B20/1816 , G11B20/1879 , G11B21/12 , G11B21/22
摘要： The present invention overcomes the problems that accompany the use of ramps to load and unload transducer carrying sliders in rigid magnetic disk data storage devices. The tracks in the region where the slider loads and unloads are read and the errors recorded following each slider loading operation. One technique is to track the error increase and identify imminent device failure when the rate of error increase during a given number of the most recent slider load cycles exceeds a threshold value. In another mode, a dedicated sequence of tracks is recorded at an increased linear density to assure that read errors occur to enable a more effective comparative evaluation. This makes possible a two stage evaluation, a first threshold number of errors indicative of degrading performance which initiates lower actuator velocity to inhibit further degradation and a second threshold error quantity that indicates imminent catastrophic failure and triggers a warning to the system user. To make the analysis more meaningful, certain errors may be ignored, such as simpler errors or the full number of errors in a cluster that may be the result of a single event.
摘要翻译：本发明克服了使用斜坡在刚性磁盘数据存储装置中装载和卸载传感器携带滑块的问题。读取滑块加载和卸载的区域中的轨迹，并在每个滑块加载操作之后记录错误。一种技术是在给定数量的最近的滑块加载循环中的错误增加率超过阈值时跟踪错误增加并识别即将发生的设备故障。在另一种模式中，以增加的线性密度记录专用的磁道序列，以确保发生读取错误以实现更有效的比较评估。这使得可以进行两阶段评估，指示降级性能的第一阈值数量的错误，其启动较低的致动器速度以抑制进一步劣化，以及指示即将发生的灾难性故障并触发对系统用户的警告的第二阈值误差量。为了使分析更有意义，可能会忽略某些错误，例如可能是单个事件的结果的更简单的错误或集群中的完整数量的错误。

2. 发明授权

US06831808B2 Method and apparatus for determining track identity from abbreviated track identifying data in a disk drive data storage device 失效
标题翻译：用于从磁盘驱动器数据存储装置中的缩写磁道识别数据确定磁道标识的方法和装置
公开(公告)号：US06831808B2
公开(公告)日：2004-12-14
申请号：US09930596
申请日：2001-08-15
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B5596
CPC分类号： G11B5/5965
摘要： A disk for a disk drive data storage device contains embedded track identifying fields which identify a track within a range of tracks, the range being less than the full range of tracks on the disk surface. The full identity of a track during a track seek operation is determined by iteratively assuming a track identity and estimating acceleration of the transducer based on the assumed track identity, until a track identity is found for which estimated acceleration meets some pre-determined threshold. Preferably, embedded servo fields are recorded at angularly spaced intervals on the disk surface, and every Nth servo field contains a Gray code full track identifier, while all servo fields in between contain abbreviated Gray code fields which identify a track within a range of tracks.
摘要翻译：用于磁盘驱动器数据存储设备的磁盘包含识别轨道范围内的轨道的嵌入轨道识别区域，该范围小于盘表面上的轨迹的全部范围。通过迭代地假设轨道标识并基于所假定的轨道标识来估计换能器的加速度，直到发现所估计的加速度满足一些预定阈值的轨迹标识来确定轨迹搜索操作期间轨道的完整身份。优选地，在盘表面上以角度间隔的间隔记录嵌入式伺服字段，并且每第N个伺服字段包含格雷码全迹标识符，而其间的所有伺服字段包含识别轨道范围内的轨道的缩写格雷码字段。

3. 发明授权

US06775081B2 Servo format for disk drive data storage devices 失效
标题翻译：磁盘驱动器数据存储设备的伺服格式
公开(公告)号：US06775081B2
公开(公告)日：2004-08-10
申请号：US09930594
申请日：2001-08-15
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B509
CPC分类号： G11B5/012 , G11B5/59633 , G11B5/59688 , G11B20/1217 , G11B27/3027 , G11B2020/1292 , G11B2020/1298 , G11B2220/20
摘要： A recording disk contains at least two types of servo sector format, including a first type having a relatively larger track identifying field containing the track number, and a second type having an abbreviated track identifying field identifying a track within a range of tracks, the range being less than the full range of tracks on the disk surface. Preferably, Gray code encodings are used, the first type of track field contains sufficient Gray code bits to identify the ful track number, every Nth servo sector is of the first type, and all servo sectors in between are of the second type, N being at least 2. As a result, the disk area required for track identification is reduced, and the additional disk space available can be used to expand the PES field.
摘要翻译：记录盘包含至少两种类型的伺服扇区格式，包括具有相对较大的轨道识别字段的第一类型，该第一类型包含轨道号，以及第二类型，其具有标识轨道范围内的轨道的缩写轨迹识别字段，小于磁盘表面的全部磁道范围。优选地，使用格雷码编码，第一类型的轨道场包含足够的格雷码位以识别轨道号，每第N个伺服扇区是第一类型，并且其间的所有伺服扇区都是第二类型，N是至少2.结果，减少了磁道识别所需的磁盘区域，并且可以使用可用的附加磁盘空间来扩展PES字段。

4. 发明授权

US06654191B2 Restoration of hard disk drive readback signal in the presence of thermal modulation 失效
标题翻译：在存在热调制的情况下恢复硬盘驱动器回读信号
公开(公告)号：US06654191B2
公开(公告)日：2003-11-25
申请号：US09904429
申请日：2001-07-12
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B500
CPC分类号： G11B20/24 , G11B5/012 , G11B5/02 , G11B20/10 , G11B2005/0016
摘要： A magnetoresistive (MR) head of a hard disk drive provides a readback signal from a data storage disk. The readback signal is high pass filtered, amplified, sampled and digitized to obtain a digital readback signal. A thermal component of the digital readback signal is removed from the digital readback signal by an efficient nonlinear process in which an envelope of the digital readback signal is estimated to obtain upper and lower envelope sequences. The upper and lower envelope sequences are averaged to derive the estimated thermal component to be subtracted from the digital readback signal.
摘要翻译：硬盘驱动器的磁阻（MR）磁头提供来自数据存储盘的回读信号。回读信号被高通滤波，放大，采样和数字化以获得数字回读信号。通过有效的非线性处理从数字回读信号中去除数字回读信号的热分量，其中估计数字回读信号的包络以获得上下包络序列。平均上下包络序列以导出从数字回读信号中减去的估计热分量。

5. 发明授权

US06424484B1 Apparatus with and method of unique disk identification for magnetic hard disk drives 有权
标题翻译：用于磁性硬盘驱动器的独特磁盘识别装置和方法
公开(公告)号：US06424484B1
公开(公告)日：2002-07-23
申请号：US09506968
申请日：2000-02-18
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B2102
CPC分类号： G11B19/12
摘要： A bar coded magnetic recording pattern uniquely identifying the disk of a disk drive is disposed, at the time the disk is single disk tested and accepted, in a reserved area that is not used for data recording by the disk drive assembly. The identifying recording is disposed in a reserved region that is accessible by the magnetic transducer of the disk drive. The identifying recording may be read to determine the orientation of the disk in the disk drive and may be read to positively identify the disk to permit repair, recall or data transfer from specifically identified disks without shut down and/or disassembly of the disk drives incorporating the designated disks.
摘要翻译：在磁盘被单盘测试和接受的情况下，在不用于由磁盘驱动器组件进行数据记录的保留区域中，设置唯一地标识磁盘驱动器的磁盘的条形码磁记录图案。识别记录设置在可由磁盘驱动器的磁换能器访问的保留区域中。可以读取识别记录以确定盘在磁盘驱动器中的取向，并且可以读取以便确定地识别磁盘，以允许从专门识别的磁盘进行修复，调用或数据传输，而不关闭和/或拆卸包含的磁盘驱动器指定的磁盘。

6. 发明授权

US06415238B1 Adaptive compensation for arm electronics amplification circuitry of a disk drive system 失效
标题翻译：磁盘驱动器系统的臂电子放大电路的自适应补偿
公开(公告)号：US06415238B1
公开(公告)日：2002-07-02
申请号：US09354503
申请日：1999-07-16
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G06F1900
CPC分类号： G11B5/4853 , G11B5/012 , G11B5/09 , G11B5/486 , G11B2005/001 , G11B2005/0016
摘要： An apparatus and method for estimating one or more pole frequencies of an amplifier circuit, such as a readback signal amplifier circuit implemented in an arm electronics module of a data storage system, are disclosed. A bias signal that biases the read transducer is modulated at first and second modulation frequencies while a readback signal is obtained from a data storage medium using the read transducer. The readback signal is communicated to the amplifier, and an output signal of the amplifier circuit is measured at the respective first and second modulation frequencies. The amplifier pole frequency is determined by computing a square impedance measurement ratio using square magnitudes of the bias signal and the amplifier output signal respectively measured at the first and second modulation frequencies.
摘要翻译：公开了一种用于估计诸如在数据存储系统的臂电子模块中实现的回读信号放大器电路的放大器电路的一个或多个极点频率的装置和方法。偏置读取传感器的偏置信号在第一和第二调制频率下被调制，同时使用读取的换能器从数据存储介质获得回读信号。回读信号被传送到放大器，并且在相应的第一和第二调制频率处测量放大器电路的输出信号。通过使用分别在第一和第二调制频率测量的偏置信号和放大器输出信号的平方值计算平方阻抗测量比来确定放大器极点频率。

7. 发明授权

US6031683A Method for optimization of seek and settle performance in hard disk drives 失效
标题翻译：优化硬盘驱动器寻找和安置性能的方法
公开(公告)号：US6031683A
公开(公告)日：2000-02-29
申请号：US990585
申请日：1997-12-15
申请人： David Eugene Iverson , Hal Hjalmar Ottesen , Gordon James Smith , Donald R. Tobie
发明人： David Eugene Iverson , Hal Hjalmar Ottesen , Gordon James Smith , Donald R. Tobie
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A method and apparatus for optimizing the seek/settle performance of a storage device. The present invention measures the seek/settle performance for each individual head and selects the heads with the best seek/settle performance, i.e., access performance. The invention includes a processor for calculating velocity deviations for each of the plurality of heads to determine a set of suitable seek heads from the plurality of heads, a head selection circuit for switching from a current head to a preferred head from the set of suitable seek heads and an actuator controller for seeking with the preferred head to a virtual track corresponding to a target track. The processor calculates a preferred/target runout difference for smoothing the settle of the preferred head and the head selection circuit switches from the preferred head to a target head aligned with the target track. The preferred/target runout difference comprises the differences between the runout for the preferred head and the target head for N sectors and the preferred/target runout difference is provided to the actuator controller upon calculation by the processor. The head selection circuit switches from the preferred head to a target head aligned with the target track at a predetermined period before the target head is positioned at the target track. The preferred head is a randomly selected head from the set of suitable seek heads. The head selection circuit switches from the preferred head to a target head aligned with the target track for read operations.
摘要翻译：一种用于优化存储设备的寻找/定位性能的方法和装置。本发明测量每个单独头部的寻找/定位性能，并选择具有最佳寻找/结算性能的头部，即访问性能。本发明包括一个处理器，用于计算多个头中的每一个的速度偏差，以从多个头中确定一组合适的搜索头，一个头选择电路，用于从一组合适的寻道磁头和致动器控制器，用于将优选磁头搜索到对应于目标磁道的虚拟磁道。处理器计算优选/目标跳动差，用于平滑优选头部的稳定，并且头部选择电路从优选头部切换到与目标轨道对准的目标头部。优选/目标跳动差异包括优选头部的跳动与N个扇区的目标头之间的差异，并且优选/目标跳动差异由处理器计算时被提供给致动器控制器。磁头选择电路在目标磁头定位在目标磁道之前的预定时间段内，从优选磁头切换到与目标磁道对准的目标磁头。优选的头部是从一组合适的搜索头中随机选择的头部。磁头选择电路从优选的磁头切换到与目标磁道对准的目标磁头，用于读取操作。

8. 发明授权

US06768607B2 Adaptive dual-frequency notch filter 失效
标题翻译：自适应双频陷波滤波器
公开(公告)号：US06768607B2
公开(公告)日：2004-07-27
申请号：US09934767
申请日：2001-08-22
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B5596
CPC分类号： G11B5/59627 , G11B5/59611
摘要： A disk drive comprises an actuator servo control system including at least one disk, an actuator structure comprising at least transducer head for writing and/or reading data from the disk and providing a transducer head position error signal (PES), and a servo compensator applying a servo control algorithm to the PES to produce a servo control signal. An adaptive elliptic notch filter controller is adapted to analyze the PES for a transducer head at a disk track radii, identify resonant disturbances present in the PES, select two adjacent resonant disturbances having first and second frequencies, ascertain coefficients of at least a fourth-order elliptic notch filter transfer function having first and second zero-notches with frequencies substantially at the first and second resonant frequencies, apply the at least fourth-order elliptic notch filter transfer function with the ascertained coefficients in the servo system to thereby substantially attenuate the selected adjacent resonant disturbances.
摘要翻译：磁盘驱动器包括致动器伺服控制系统，该致动器伺服控制系统包括至少一个盘，致动器结构至少包括用于从盘盘写入和/或读取数据的换能器头，并提供换能器头部位置误差信号（PES），以及施加伺服补偿器伺服控制算法到PES产生伺服控制信号。自适应椭圆陷波滤波器控制器适于分析在盘轨道半径处的换能器头的PES，识别出现在PES中的谐振干扰，选择具有第一和第二频率的两个相邻谐振干扰，确定至少四阶的系数椭圆陷波滤波器传递函数具有第一和第二零陷波，频率基本上处于第一和第二谐振频率，在伺服系统中施加具有确定系数的至少四阶椭圆陷波滤波器传递函数，从而基本上衰减所选择的相邻谐振干扰。

9. 发明授权

US06671111B2 Readback signal detection and analysis in a magnetic data storage system 有权
标题翻译：磁数据存储系统中的回读信号检测和分析
公开(公告)号：US06671111B2
公开(公告)日：2003-12-30
申请号：US09872554
申请日：2001-06-01
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B2736
CPC分类号： G11B27/36 , G11B5/012 , G11B20/10009 , G11B20/1403 , G11B2005/0021
摘要： Embodiments of systems, methods and article of manufacture provide for readback signal detection and analysis. One embodiment provides an in-situ system to detect envelope traces of a readback signal. Using the envelope data, the presence of undesirable activity and/or storage medium surface conditions may be determined. For example, head modulation may be determined. Upon detection of a modulation event in a sector or a track, the compromised data may be recovered using a signal processing system. Another embodiment provides for detection of a thermal signal component in a readback signal. The thermal signal is processed for surface information indicative of the surface condition. Information indicating a defect may then be used to avoid storage areas having the defects.
摘要翻译：系统，方法和制造的实施例提供回读信号检测和分析。一个实施例提供了一种用于检测回读信号的包络线的原位系统。使用包络数据，可以确定不期望的活动和/或存储介质表面条件的存在。例如，可以确定头部调制。在检测到扇区或轨道中的调制事件时，可以使用信号处理系统来恢复被破坏的数据。另一个实施例提供了在回读信号中检测热信号分量。处理热信号用于表示表面状况的表面信息。然后可以使用指示缺陷的信息来避免存在缺陷的区域。

10. 发明授权

US06657809B2 Method and apparatus for positioning a transducer using a phase difference in surface profile variations on a storage medium 失效
公开(公告)号：US06657809B2
公开(公告)日：2003-12-02
申请号：US09772654
申请日：2001-01-29
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B5596
CPC分类号： G11B5/012 , G11B5/59611 , G11B5/82 , G11B11/00 , G11B13/00 , G11B2005/0002 , G11B2005/0005
摘要： A method and apparatus for positioning a transducer relative to a storage medium in a storage device. The storage medium is moved relative to the transducer by a motor at a rated storage medium velocity. The storage medium has a plurality of tracks, each having a first edge and a second edge. The first edge and the second edge respectively comprise surface profile variations having a temporal frequency at the rated storage medium velocity. The surface profile variations of the first and second edges are phase modulated, i.e., have a phase difference relative to one another. First and second responses, e.g., thermal responses, are respectively induced in the transducer by the phase modulated surface profile variations of the first and second edges. The transducer may be positioned by a controller, for example, based on at least one of the first and second thermal responses. A storage medium having phase modulated surface profile variations is relatively easy to fabricate. Moreover, relatively simple servo electronics can be used with the phase modulated surface profile variations.

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