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1. 发明授权

US06385000B1 System and method for extending the operating life of a magnetoresistive transducer provided in a disk drive system 有权
标题翻译：用于延长磁盘驱动系统中提供的磁阻换能器的使用寿命的系统和方法
公开(公告)号：US06385000B1
公开(公告)日：2002-05-07
申请号：US09137983
申请日：1998-08-21
申请人： Hal Hjalmar Ottesen , Gordon James Smith , Donald R. Tobie
发明人： Hal Hjalmar Ottesen , Gordon James Smith , Donald R. Tobie
IPC分类号： G11B1512
CPC分类号： G11B5/59683 , G11B5/553 , G11B5/596 , G11B15/125 , G11B19/04 , G11B2005/0016
摘要： An apparatus and method for extending the service life of an MR element incorporated in a read/write head involves detecting periods of disk drive system inactivity and selectively switching between the heads for purposes of reading servo information during the inactive periods. Switching between heads may involve selecting each of the heads for reading servo information during one or more periods of disk drive system inactivity or selecting each of the heads in sequence during a respective period of system inactivity. Selecting between heads may also involve selecting a head having a minimum of usage, such as a head having an MR element with a minimum of cumulative operational time or energy dissipation relative to other MR elements provided in the disk drive system. Selecting between heads may further include selectively activating each of the heads for reading servo information for a predetermined duration of time during one or more periods of system idleness. An alternative method involves moving the head to a target location, such as a location of maximum head-to-disk clearance, over a surface of a data storage disk, and reducing the servo sampling rate during a period of system inactivity. Reducing the servo sampling rate involves reducing the rate from a nominal number of servo samples per disk revolution to a reduced number of servo samples per disk revolution, such as one servo sample per disk revolution. The MR elements may be selectively activated during idle periods so as to further reduce usage of the MR elements.
摘要翻译：用于延长结合在读/写头中的MR元件的使用寿命的装置和方法涉及检测磁盘驱动系统不活动的周期，并且在非活动时段期间用于读取伺服信息的目的之间有选择地切换磁头。在磁头之间的切换可以包括在磁盘驱动器系统不活动的一个或多个周期期间选择每个磁头以读取伺服信息，或者在系统不活动的相应周期期间依次选择每个磁头。头之间的选择还可以涉及选择具有最小使用量的头部，例如具有相对于在盘驱动器系统中提供的其它MR元件具有最小累积操作时间或能量耗散的MR元件的头部。磁头之间的选择还可以包括在系统空闲的一个或多个周期期间选择性地激活每个磁头用于读取伺服信息一段预定的持续时间。一种替代方法包括将头部移动到数据存储盘的表面上的目标位置，例如最大头到盘间隙的位置，并且在系统不活动期间降低伺服采样率。降低伺服采样速率包括将每个磁盘转数的标称数量的伺服样本的速率降低到每个磁盘旋转的减少的伺服样本数，例如每个磁盘旋转的一个伺服样本。可以在空闲时段期间选择性地激活MR元件，以便进一步减少MR元件的使用。

2. 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。

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