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71. 发明授权

US06577460B1 Method and apparatus for improving track format efficiency in a direct access storage device 失效
标题翻译：用于提高直接存取存储装置中的轨道格式效率的方法和装置
公开(公告)号：US06577460B1
公开(公告)日：2003-06-10
申请号：US09516100
申请日：2000-03-01
申请人： Weldon Mark Hanson
发明人： Weldon Mark Hanson
IPC分类号： G11B509
CPC分类号： G11B20/10009 , G11B5/012 , G11B5/02 , G11B5/09 , G11B2005/0013
摘要： An apparatus and method for transferring data between a read/write transducer and a data storage medium provides for improved track format efficiency. Data is written to a data sector of the data storage medium using a write current waveform developed in the read/write transducer. The write current waveform is typically at one of several possible states following writing of the data to the data sector. According to the present invention, a transition pattern is generated and used for transitioning the write current waveform from the state following writing of the data to a known state consistent with coding constraints of the data channel. A predetermined data pattern associated with the known state of the write current waveform is written to a pad field of the data sector. The transition pattern and the predetermined data pattern are used to resolve detector and parity post-processor closure decisions during a sector read operation.
摘要翻译：用于在读/写换能器和数据存储介质之间传送数据的装置和方法提供了改进的磁道格式效率。使用在读/写换能器中形成的写电流波形将数据写入数据存储介质的数据扇区。在将数据写入数据扇区之后，写入电流波形通常处于几种可能状态之一。根据本发明，产生转换模式并用于将写入电流波形从数据写入之后的状态转换到与数据信道的编码约束一致的已知状态。与写入电流波形的已知状态相关联的预定数据模式被写入数据扇区的焊盘字段。过渡模式和预定数据模式用于在扇区读取操作期间解决检测器和奇偶校验后处理器闭合判定。

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