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公开(公告)号：US5406426A
公开(公告)日：1995-04-11
申请号：US107452
申请日：1993-08-17
申请人： Martin L. Culley , Marvin DeForest
发明人： Martin L. Culley , Marvin DeForest
CPC分类号： G11B27/3027 , G11B27/19
摘要： The present invention includes a method, apparatus and disk format for implementation of the same to provide fault tolerant detection of ID fields for data sectors in order to eliminate errors caused by mis-alignment and mis-detection of hard sector marks. Logic is provided to initiate a time-out count at the completion of a hard sector count. The time-out count is specified to be a period of time within which a hard sector mark should be detected. If the time out count counts down and a hard sector mark is not detected, then a possible error situation arises and the fault tolerant process is initiated to compensate for the lack of detection of a hard sector mark. Thus, at the end of the time-out count, a small burst count is started. This small burst count is of a shorter duration than the original burst count utilized, but is long enough to bring the head assembly to the location in the sector at the beginning of the user data at which time the hard sector count is initiated to count down the user data locations for that hard sector. Thus, the beginning of the user data area will always be determined and errors due to ill-defined user data areas caused by mis-detection of an hard sector mark are avoided.
摘要翻译： 本发明包括用于实现该方法，装置和盘格式以提供用于数据扇区的ID字段的容错检测，以便消除由于硬扇区标记的错误对准和错误检测而导致的错误。 提供逻辑以在完成硬扇区计数时启动超时计数。 超时计数被指定为应检测硬扇区标记的时间段。 如果超时计数倒计时，并且没有检测到硬扇区标记，则出现可能的错误情况，并启动容错过程以补偿缺少硬扇区标记的检测。 因此，在超时计数结束时，开始小的脉冲串计数。 这个小脉冲串计数的持续时间比原来的脉冲串计数要短，但是长度足以使头部组件在用户数据开始时到达扇区中的位置，此时硬扇区计数开始计数 该硬盘扇区的用户数据位置。 因此，将始终确定用户数据区域的开始，并避免由于硬扇区标记的错误检测而引起的不明确的用户数据区域的错误。
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公开(公告)号：US5588030A
公开(公告)日：1996-12-24
申请号：US585260
申请日：1996-01-11
申请人： C. M. Riggle , Marvin DeForest
发明人： C. M. Riggle , Marvin DeForest
CPC分类号： G11B27/3027 , H04J3/0608
摘要： In the system of the present invention, the system includes a pre-synchronizer to eliminate the need for examining every possible substring preceding the EOP (end of preamble) mark in order to detect the EOP. For the case where autocorrelation techniques are used to provide error synchronization error tolerance, this results in a much shorter EOP, since it is possible to find shorter EOPs which do not falsely synchronize prior to the arrival of the true EOP. In particular, the preamble is utilized to perform pre-synchronization. Once pre-synchronization has been achieved, the search for the EOP can be focused on a subset of all possible substrings as opposed to prior techniques which looked at all possible substrings. The resultant system solves the problem with less logic and more error tolerance.
摘要翻译： 在本发明的系统中，该系统包括一个预同步器，以消除检查EOP（前导码结尾）标记之前的每个可能子串的需要，以便检测EOP。 对于使用自相关技术提供错误同步误差容限的情况，这导致了更短的EOP，因为可以在真实EOP到达之前找到不会错误同步的较短EOP。 特别地，前导码用于执行预同步。 一旦实现了预同步，就可以将EOP的搜索集中在所有可能的子字符串的子集上，而不是查看所有可能的子字符串的现有技术。 所得到的系统解决了具有较少逻辑和更多误差容限的问题。
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