Resonance screen with varying frequency and controllable gain booster
    1.
    发明授权
    Resonance screen with varying frequency and controllable gain booster 失效
    具有变化频率和可控增益增强器的共振屏

    公开(公告)号:US06687065B2

    公开(公告)日:2004-02-03

    申请号:US09778472

    申请日:2001-02-07

    IPC分类号: G11B2736

    摘要: A disc drive includes a base and a disc rotatably attached to the base. The disc drive also includes an actuator assembly rotatably attached to said base and a device for moving the actuator assembly. The actuator assembly includes an actuator arm and a transducer head in a transducing relationship with respect to the disc. The transducer is attached to the actuator arm. A method for screening disc drives for resonant frequencies associated with the actuator arm includes the steps of following a track within the disc drive, and selectively boosting the servo control signal. The method further includes a step of monitoring a position error signal from a transducer attached to an actuator arm of a disc drive. The position error signal is monitored by filtering the position error signal using a bandpass filter. Boosting the servo control loop includes tuning the magnitude of the booster signal gain.

    摘要翻译: 盘驱动器包括基座和可旋转地附接到基座的盘。 盘驱动器还包括可旋转地附接到所述基座的致动器组件和用于移动致动器组件的装置。 致动器组件包括致动器臂和相对于盘的换能关系的换能器头。 传感器连接到执行器臂。 用于筛选与致动器臂相关联的谐振频率的盘驱动器的方法包括跟随盘驱动器内的轨道并且选择性地升高伺服控制信号的步骤。 该方法还包括监测来自附接到盘驱动器的致动器臂的换能器的位置误差信号的步骤。 通过使用带通滤波器对位置误差信号进行滤波来监视位置误差信号。 升压伺服控制回路包括调整升压信号增益的幅度。

    Method and apparatus for increasing process yields of data storage devices
    3.
    发明授权
    Method and apparatus for increasing process yields of data storage devices 失效
    用于提高数据存储设备的处理成本的方法和装置

    公开(公告)号:US06795261B2

    公开(公告)日:2004-09-21

    申请号:US09893090

    申请日:2001-06-27

    IPC分类号: G11B2736

    摘要: Method and apparatus for increasing process yields of data storage devices which store data on media surfaces using read/write heads. An initial linear bit recording density is determined for each head, the linear bit recording density comprising a density at which each head is capable of writing data to and reading data from the corresponding media surface. Defective storage sectors are identified on the media surfaces to determine whether a sufficient number of logical storage sectors are available to meet a predetermined data storage capacity. The linear bit recording density of at least one of the heads is then altered to ensure that the storage device has sufficient logical storage sectors to meet the predetermined capacity.

    摘要翻译: 用于增加使用读/写头在介质表面上存储数据的数据存储设备的处理产量的方法和装置。 对于每个头部确定初始线性位记录密度,线性位记录密度包括每个头部能够将数据写入和从相应介质表面读取数据的密度。 在介质表面上识别不良的存储扇区,以确定足够数量的逻辑存储扇区是否可用于满足预定的数据存储容量。 然后更改至少一个磁头的线性位记录密度,以确保存储设备具有足够的逻辑存储扇区以满足预定容量。

    Adjusting track density and bit density to provide limited excess capacity in a storage device
    4.
    发明授权
    Adjusting track density and bit density to provide limited excess capacity in a storage device 失效
    调整轨道密度和位密度,以在存储设备中提供有限的过剩容量

    公开(公告)号:US06633442B2

    公开(公告)日:2003-10-14

    申请号:US09873579

    申请日:2001-06-04

    IPC分类号: G11B2736

    摘要: A method sets bit densities and track densities for a plurality of heads in a data storage device. The method includes determining an initial bit density and an initial track density for each head. An initial total capacity for the storage device is determined based on the initial track densities and the initial bit densities. A desired capacity for the storage device is selected and the initial total capacity and the desired capacity are compared. One of either a bit density or a track density is then adjusted so that the data storage device has an adjusted capacity that provides some excess capacity over the desired capacity where the excess capacity is less than any excess capacity that was present between the initial capacity and the desired capacity. A data storage device formed through this method is also provided.

    摘要翻译: 一种方法设置数据存储装置中的多个磁头的位密度和磁道密度。 该方法包括确定每个头部的初始位密度和初始轨道密度。 基于初始轨道密度和初始比特密度来确定存储设备的初始总容量。 选择存储设备的期望容量,并比较初始总容量和期望容量。 然后调整位密度或磁道密度之一,使得数据存储设备具有经调整的容量,其在超过容量小于存在于初始容量和初始容量之间的任何过剩容量的期望容量上提供一些过剩容量 所需容量。 还提供了通过该方法形成的数据存储设备。

    Adaptive recording band expansion methodology
    5.
    发明授权
    Adaptive recording band expansion methodology 有权
    自适应录音带扩展方法

    公开(公告)号:US07529054B2

    公开(公告)日:2009-05-05

    申请号:US10824861

    申请日:2004-04-15

    IPC分类号: G11B21/02

    摘要: A method, and system configured to implement the method, are provided. The method includes the steps of identifying a last usable track on a surface as a function of a parameter, and defining a standoff band of tracks relative to the last usable track to obtain an achieved maximum track on the surface. The last usable track is, in exemplary embodiments, a track beyond a default maximum track on a surface of a data storage medium.

    摘要翻译: 提供了一种配置为实现该方法的方法和系统。 该方法包括以下步骤:根据参数识别表面上的最后可用轨迹,并且相对于最后可用轨道定义轨道的间隔带以获得表面上实现的最大轨迹。 在示例性实施例中,最后可用的轨道是超出数据存储介质的表面上的默认最大轨道的轨道。

    Method and apparatus for managing buffer random access memory
    6.
    发明申请
    Method and apparatus for managing buffer random access memory 有权
    用于管理缓冲随机存取存储器的方法和装置

    公开(公告)号:US20050066227A1

    公开(公告)日:2005-03-24

    申请号:US10664611

    申请日:2003-09-18

    CPC分类号: G06F12/023 G06F12/0893

    摘要: A buffer random access memory has a first portion reserved for a defect table and a second portion reserved for data caching. A method of managing the buffer random access memory includes determining actual memory space of the first portion which is occupied by the defect table. This identifies unused memory space of the first portion of the buffer random access memory. The method then includes reallocating the unused memory space of the first portion of the buffer random access memory for use in data caching. Controllers and mass storage devices which implement the method are also provided.

    摘要翻译: 缓冲随机存取存储器具有为缺陷表保留的第一部分和为数据高速缓存而保留的第二部分。 一种管理缓冲随机存取存储器的方法包括:确定由缺陷表占用的第一部分的实际存储空间。 这标识缓冲器随机存取存储器的第一部分的未使用的存储器空间。 该方法然后包括重新分配用于数据高速缓存的缓冲随机存取存储器的第一部分的未使用的存储器空间。 还提供了实现该方法的控制器和大容量存储设备。

    Signal-to-noise ratio (SNR) value characterization in a data recovery channel
    7.
    发明申请
    Signal-to-noise ratio (SNR) value characterization in a data recovery channel 审中-公开
    数据恢复通道中的信噪比(SNR)值表征

    公开(公告)号:US20050244167A1

    公开(公告)日:2005-11-03

    申请号:US10834480

    申请日:2004-04-29

    IPC分类号: G11B5/596 H04B10/06

    CPC分类号: G11B5/59605

    摘要: Method and apparatus for determining a signal-to-noise ratio (SNR) value from a readback signal, such as in a data storage device. A readback signal is obtained by a receiver (such as a data transducing head) coupled to a data recovery channel having a variable gain amplifier (VGA) and a threshold detector (TD). The data channel applies a selectable VGA gain value to the readback signal while errors are accumulated using a selectable error detection threshold from the TD. The SNR value is determined at least from a magnitude of the error detection threshold, and preferably from first and second VGA gain values using a linear regression model. The determined SNR value is highly correlated to classical SNR values obtained using external equipment such as an analyzer or oscilloscope, and is advantageously used in automated fashion during high volume manufacturing certification testing.

    摘要翻译: 用于从诸如数据存储设备中的回读信号确定信噪比(SNR)值的方法和装置。 通过耦合到具有可变增益放大器(VGA)和阈值检测器(TD)的数据恢复通道的接收器(例如数据传输头)获得回读信号。 数据通道将可选择的VGA增益值应用于回读信号,同时使用TD的可选误差检测阈值积累错误。 SNR值至少从误差检测阈值的大小确定,优选地使用线性回归模型从第一和第二VGA增益值确定。 确定的SNR值与使用诸如分析仪或示波器之类的外部设备获得的经典SNR值高度相关,并且在大批量制造认证测试期间有利地以自动化方式使用。

    Method and apparatus for managing buffer random access memory
    9.
    发明授权
    Method and apparatus for managing buffer random access memory 有权
    用于管理缓冲随机存取存储器的方法和装置

    公开(公告)号:US07434019B2

    公开(公告)日:2008-10-07

    申请号:US10664611

    申请日:2003-09-18

    IPC分类号: G06F12/00

    CPC分类号: G06F12/023 G06F12/0893

    摘要: A buffer random access memory has a first portion reserved for a defect table and a second portion reserved for data caching. A method of managing the buffer random access memory includes determining actual memory space of the first portion which is occupied by the defect table. This identifies unused memory space of the first portion of the buffer random access memory. The method then includes reallocating the unused memory space of the first portion of the buffer random access memory for use in data caching. Controllers and mass storage devices which implement the method are also provided.

    摘要翻译: 缓冲随机存取存储器具有为缺陷表保留的第一部分和为数据高速缓存而保留的第二部分。 一种管理缓冲随机存取存储器的方法包括:确定由缺陷表占用的第一部分的实际存储空间。 这标识缓冲器随机存取存储器的第一部分的未使用的存储器空间。 该方法然后包括重新分配用于数据高速缓存的缓冲随机存取存储器的第一部分的未使用的存储器空间。 还提供了实现该方法的控制器和大容量存储设备。

    Adaptive recording band expansion methodology
    10.
    发明申请
    Adaptive recording band expansion methodology 有权
    自适应录音带扩展方法

    公开(公告)号:US20050231842A1

    公开(公告)日:2005-10-20

    申请号:US10824861

    申请日:2004-04-15

    摘要: A method, and system configured to implement the method, are provided. The method includes the steps of identifying a last usable track on a surface as a function of a parameter, and defining a standoff band of tracks relative to the last usable track to obtain an achieved maximum track on the surface. The last usable track is, in exemplary embodiments, a track beyond a default maximum track on a surface of a data storage medium.

    摘要翻译: 提供了一种配置为实现该方法的方法和系统。 该方法包括以下步骤:根据参数识别表面上的最后可用轨迹,并且相对于最后可用轨道定义轨道的间隔带以获得表面上实现的最大轨迹。 在示例性实施例中,最后可用的轨道是超出数据存储介质的表面上的默认最大轨道的轨道。