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1. 发明授权

US5091909A Method for writing/reading of data in magnetic disk subsystem 失效
标题翻译：磁盘子系统中数据写入/读取的方法
公开(公告)号：US5091909A
公开(公告)日：1992-02-25
申请号：US288150
申请日：1988-12-22
申请人： Shigeru Kishiro , Tomohito Ogino , Yoshiaki Muto , Katsunori Nakamura , Yoshiro Shiroyanagi
发明人： Shigeru Kishiro , Tomohito Ogino , Yoshiaki Muto , Katsunori Nakamura , Yoshiro Shiroyanagi
IPC分类号： G06F11/10 , G06F12/08
CPC分类号： G06F11/1008 , G06F11/1076 , G06F12/0866
摘要： When recording records into the IC memory group of a magnetic disk subsystem the records being composed of a count area of a fixed length, key area of a variable length and a data area of a variable length, data of a special format which is judged by ECC check to be an abnormal data is written at the top of the count area in each record. When reading an object record from the IC memory group, it is judged by ECC check whether or not the read data is an abnormal one. When the read data is judged to be an abnormal one, the read data is compared with the data of special format, and when there is found a coincidence between them, it is recognized that the read data are at the top of the count area. When writing data, data which are judged by ECC check to be a normal are suffixed to data which are judged by ECC check to be abnormal. When the read data are judged by the ECC check to be abnormal and judged by a next ECC check to be normal, it is recognized that the read data are at the top of the count area.
摘要翻译：当将记录记录到磁盘子系统的IC存储器组中时，记录由固定长度的计数区域，可变长度的关键区域和可变长度的数据区域组成，该特定格式的数据由 ECC检查是将异常数据写入每个记录中计数区域的顶部。从IC存储器组读取对象记录时，通过ECC判断读取的数据是否为异常。当读取的数据被判断为异常时，将读取的数据与特殊格式的数据进行比较，并且当发现这些数据之间的一致时，识别出读取的数据位于计数区域的顶部。在写入数据时，通过ECC检查判断为正常的数据是通过ECC检查判断为异常的数据的后缀。当通过ECC检查判断出读取数据异常并且通过下一次ECC检查判断为正常时，识别出读取数据位于计数区域的顶部。

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