Writing spirals based on servo tracks of a different sample rate
    11.
    发明授权
    Writing spirals based on servo tracks of a different sample rate 有权
    基于不同采样率的伺服轨迹写螺旋

    公开(公告)号:US08462458B1

    公开(公告)日:2013-06-11

    申请号:US13315201

    申请日:2011-12-08

    IPC分类号: G11B21/02 G11B5/596

    CPC分类号: G11B5/59661 G11B5/59627

    摘要: Methods, devices and systems include, in some implementations, a method including: writing, using a head having a read element and a write element, a band of spiral sets, the band of spiral sets including a first spiral set and a second spiral set different from the first spiral set; writing, using the write element, servo information that includes one or more sets of servo wedges while the read element is servoing on the first spiral set; and servoing the read element on the second spiral set based on one or more determined conditions under which writing the servo information coincides with reading data from the first spiral set.

    摘要翻译: 在一些实施方式中,方法,装置和系统包括一种方法,包括:使用具有读取元件和写入元件的头部来写入螺旋组的带,所述螺旋组的带包括第一螺旋组和第二螺旋组 不同于第一螺旋集; 在所述读取单元在所述第一螺旋组上进行伺服时,使用所述写元件写入包括一组或多组伺服楔的伺服信息; 以及基于写入所述伺服信息与从所述第一螺旋集合读取数据一致的一个或多个确定条件来将所述读取元件在所述第二螺旋组上进行伺服。

    METHOD FOR STORAGE DEVICES TO ACHIEVE LOW WRITE AMPLIFICATION WITH LOW OVER PROVISION
    12.
    发明申请
    METHOD FOR STORAGE DEVICES TO ACHIEVE LOW WRITE AMPLIFICATION WITH LOW OVER PROVISION 有权
    存储设备的方法,用于实现低写扩频功能

    公开(公告)号:US20120303873A1

    公开(公告)日:2012-11-29

    申请号:US13461899

    申请日:2012-05-02

    IPC分类号: G06F12/00

    摘要: A solid state drive (SSD) includes an SSD control module configured to determine frequencies corresponding to how often data stored in respective logical addresses associated with the SSD is updated and form groups of the logical addresses according to the frequencies, and a memory control module configured to rewrite the data to physical addresses in blocks of an SSD storage region based on the groups.

    摘要翻译: 固态驱动器(SSD)包括SSD控制模块,其被配置为确定对应于根据频率更新存储在与SSD相关联的相应逻辑地址中的数据的频率和形成逻辑地址组的频率,以及配置的存储器控​​制模块 基于组将数据重写到SSD存储区域的块中的物理地址。

    MEMORY ACCESS TABLE SAVING AND RESTORING SYSTEM AND METHODS
    13.
    发明申请
    MEMORY ACCESS TABLE SAVING AND RESTORING SYSTEM AND METHODS 有权
    存储器访问表保存和恢复系统和方法

    公开(公告)号:US20110296123A1

    公开(公告)日:2011-12-01

    申请号:US13110517

    申请日:2011-05-18

    IPC分类号: G06F12/00

    摘要: A system includes a first memory configured to store a first lookup table (LUT) with first metadata. A second memory is configured to store a second LUT with second metadata, wherein the first metadata includes a first mapping between logical addresses and physical addresses. The second metadata includes a second mapping between the logical addresses and the physical addresses. A control module is configured to update the first metadata. The control module is configured to update segments of the second metadata based on the first metadata at respective predetermined times. Each of the segments refers to a predetermined number of entries of the second LUT.

    摘要翻译: 系统包括被配置为存储具有第一元数据的第一查找表(LUT)的第一存储器。 第二存储器被配置为存储具有第二元数据的第二LUT,其中第一元数据包括逻辑地址和物理地址之间的第一映射。 第二元数据包括逻辑地址和物理地址之间的第二映射。 控制模块被配置为更新第一元数据。 控制模块被配置为在各个预定时间基于第一元数据更新第二元数据的段。 每个段涉及第二LUT的预定数量的条目。

    Calibrating servos
    14.
    发明授权
    Calibrating servos 有权
    校准伺服

    公开(公告)号:US08023216B1

    公开(公告)日:2011-09-20

    申请号:US12192984

    申请日:2008-08-15

    IPC分类号: G11B5/09

    摘要: Methods, systems, and apparatus, including computer program products are described for calibrating servos, and in some implementations, calibrating spiral servos for use in self-servo-write SSW processes. In one aspect, a method is provide that includes rotating a machine readable medium, and detecting a spiral on the machine readable medium. Detecting a spiral on the machine readable medium includes detecting magnitudes of the spiral and a timing mark, storing a timestamp from a clock signal that corresponds to the timing mark of the spiral, determining a peak of the spiral from the magnitudes, and locking the clock signal to the peak of the spiral using the timestamp.

    摘要翻译: 描述了包括计算机程序产品在内的方法,系统和装置,用于校准伺服系统,并且在一些实施方式中,校准用于自伺服写入SSW过程的螺旋伺服。 在一个方面,提供了一种方法,其包括旋转机器可读介质,以及检测机器可读介质上的螺旋。 在机器可读介质上检测螺旋包括检测螺旋的大小和定时标记,从对应于螺旋的定时标记的时钟信号存储时间戳,从该幅度确定螺旋的峰值,并锁定时钟 使用时间戳信号到螺旋峰值。

    Helicoid group switching
    15.
    发明授权
    Helicoid group switching 有权
    螺旋组切换

    公开(公告)号:US07869158B1

    公开(公告)日:2011-01-11

    申请号:US12192931

    申请日:2008-08-15

    摘要: A recording medium can include multiple helicoid patterns arranged in multiple helicoid groups, e.g., first and second helicoid groups. Operating a disk drive can include switching between helicoid groups to maintain the alignment of the head with respect to a target track of the rotating recording medium. Enabling a switch can include receiving a waveform produced by a head operated with respect to a rotating recording medium, generating first information from one or more portions of the waveform corresponding to the helicoid patterns of the first helicoid group; generating second information from one or more portions of the waveform corresponding to the helicoid patterns of the second helicoid group; and analyzing the second information with respect to the first information to generate calibration information. The calibration information can compensate for operational differences between using the helicoid patterns of the first helicoid group and the helicoid patterns of the second helicoid group.

    摘要翻译: 记录介质可以包括布置在多个螺旋组中的多个螺旋图案,例如第一和第二螺旋组。 操作磁盘驱动器可以包括在螺旋形组之间切换,以保持磁头相对于旋转记录介质的目标磁道的对准。 启用开关可以包括接收由相对于旋转记录介质操作的磁头产生的波形,从对应于第一螺旋组的螺旋图案的波形的一个或多个部分产生第一信息; 从对应于第二螺旋组的螺旋图案的波形的一个或多个部分产生第二信息; 以及分析关于所述第一信息的所述第二信息以生成校准信息。 校准信息可以补偿使用第一螺旋组的螺旋形图案和第二螺旋组的螺旋形图案之间的操作差异。

    Calibrating servos
    16.
    发明授权
    Calibrating servos 有权
    校准伺服

    公开(公告)号:US08422158B1

    公开(公告)日:2013-04-16

    申请号:US13474054

    申请日:2012-05-17

    IPC分类号: G11B5/09

    摘要: Apparatus, methods, and systems can be employed for calibrating servos, and in some implementations, spiral servos are calibrated for use in self-servo-write (SSW) processes. In an aspect, an apparatus includes a timing reference detector configured to determine timing reference information from a back electromotive force signal associated with a rotating machine readable medium, and a servo track window period generator configured to determine a relative location of a spiral on the rotating machine readable medium based on the timing reference information.

    摘要翻译: 可以使用装置,方法和系统来校准伺服,并且在一些实施方式中,螺旋伺服器被校准以用于自伺服写入(SSW)过程。 一方面,一种装置包括定时参考检测器,其被配置为从与旋转的机器可读介质相关联的反电动势信号中确定定时参考信息,以及伺服轨道窗口周期发生器,被配置为确定旋转的旋转的螺旋的相对位置 基于定时参考信息的机器可读介质。

    Calibrating servos
    17.
    发明授权
    Calibrating servos 有权
    校准伺服

    公开(公告)号:US08184392B1

    公开(公告)日:2012-05-22

    申请号:US13290448

    申请日:2011-11-07

    IPC分类号: G11B5/09

    摘要: Methods, systems, and apparatus, including computer program products are described for calibrating servos, and in some implementations, calibrating spiral servos for use in self-servo-write (SSW) processes. In one aspect, a method is provided that includes determining timing reference information on a machine readable medium, locking a clock signal to the timing reference information, detecting a spiral on the machine readable medium, determining a location of the spiral using the clock signal, and calibrating a spiral servo according to the location of the spiral.

    摘要翻译: 描述了用于校准伺服系统的方法,系统和装置,包括计算机程序产品,并且在一些实施方式中,校准用于自伺服写入(SSW)过程的螺旋伺服。 一方面,提供了一种方法,其包括确定机器可读介质上的定时参考信息,将时钟信号锁定到定时参考信息,检测机器可读介质上的螺旋,使用时钟信号确定螺旋的位置, 并根据螺旋的位置校准螺旋伺服。

    Helicoid group switching
    18.
    发明授权
    Helicoid group switching 有权
    螺旋组切换

    公开(公告)号:US08085492B1

    公开(公告)日:2011-12-27

    申请号:US12972798

    申请日:2010-12-20

    摘要: The present disclosure includes systems and techniques relating to magnetic recording devices, such as disk drives. A recording medium of a magnetic recording device can include multiple helicoid patterns arranged in multiple helicoid groups. A described technique includes receiving a waveform produced by a head operated with respect to the medium; determining, based on the waveform, first phase difference(s) corresponding to a first helicoid group; affecting an alignment of the head with respect to the medium based on the first helicoid group by compensating for the first phase difference(s) to maintain the alignment; determining, while compensating for the first phase differences, second phase difference(s) corresponding to a second helicoid group; and affecting, responsive to a switch from the first helicoid group to the second helicoid group, the alignment of the head with respect to the medium by compensating for the second phase difference(s) to maintain the alignment.

    摘要翻译: 本公开包括与诸如磁盘驱动器之类的磁记录装置有关的系统和技术。 磁记录装置的记录介质可以包括以多个螺旋组排列的多个螺旋图案。 所描述的技术包括接收由相对于介质操作的头部产生的波形; 基于所述波形确定对应于第一螺旋组的第一相位差; 通过补偿第一相位差来维持对准,影响头部相对于基于第一螺旋组的介质的对准; 在补偿所述第一相位差的同时,确定对应于第二螺旋组的第二相位差; 并且响应于从第一螺旋组到第二螺旋组的切换,通过补偿第二相位差以维持对准来影响磁头相对于介质的对准。

    Calibrating servos
    19.
    发明授权
    Calibrating servos 有权
    校准伺服

    公开(公告)号:US08068304B1

    公开(公告)日:2011-11-29

    申请号:US12192977

    申请日:2008-08-15

    IPC分类号: G11B5/09

    摘要: Methods, systems, and apparatus, including computer program products are described for calibrating servos, and in some implementations, calibrating spiral servos for use in self-servo-write (SSW) processes. In one aspect, a method is provided that includes determining timing reference information on a machine readable medium, locking a clock signal to the timing reference information, detecting a spiral on the machine readable medium, determining a location of the spiral using the clock signal, and calibrating a spiral servo according to the location of the spiral.

    摘要翻译: 描述了用于校准伺服系统的方法,系统和装置,包括计算机程序产品,并且在一些实现中,校准用于自伺服写入(SSW)过程的螺旋伺服。 一方面,提供了一种方法,其包括确定机器可读介质上的定时参考信息,将时钟信号锁定到定时参考信息,检测机器可读介质上的螺旋,使用时钟信号确定螺旋的位置, 并根据螺旋的位置校准螺旋伺服。

    Disk drive servo control using spirals
    20.
    发明授权
    Disk drive servo control using spirals 有权
    磁盘驱动器使用螺旋伺服控制

    公开(公告)号:US07881005B1

    公开(公告)日:2011-02-01

    申请号:US12228163

    申请日:2008-08-08

    申请人: Man Cheung Perry Neos

    发明人: Man Cheung Perry Neos

    IPC分类号: G11B21/02

    摘要: A servo control system includes an input that receives spiral signals generated by reading spirals that are prewritten on a magnetic medium. The servo control system further includes a control module that generates spiral correction values for the spirals based on the spiral signals and that determines positions of the spirals based on the spiral correction values.

    摘要翻译: 伺服控制系统包括一个输入端,该输入端接收通过读取在磁性介质上预先写入的螺旋产生的螺旋信号。 伺服控制系统还包括控制模块,该控制模块基于螺旋信号产生用于螺旋的螺旋校正值,并且基于螺旋校正值来确定螺旋的位置。