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101. 发明授权

US5202887A Access control method for shared duplex direct access storage device and computer system therefor 失效
标题翻译：共享双工直接存取存储设备和计算机系统的访问控制方法
公开(公告)号：US5202887A
公开(公告)日：1993-04-13
申请号：US541749
申请日：1990-06-21
申请人： Hitoshi Ueno , Masahiro Kitano , Kenji Masuda
发明人： Hitoshi Ueno , Masahiro Kitano , Kenji Masuda
IPC分类号： G06F3/06 , G06F11/20 , G11C29/00
CPC分类号： G06F11/2071 , G11C29/74
摘要： Disclosed is a DASD access control method including storing information for identifying one data group in which an irrecoverable failure has occurred in the plurality of data groups stored in each of the first and second DASDs constituting the duplex DASD pair. A judgment is determined based on the stored information as to whether one data group has an irrecoverable failure which has occurred when the one data group held in either one of the first and second DASDs constituting the duplex DASD pair is accessed by one of the plurality of processing units. Access is allowed to the one data group in the one DASD by the one processing unit when the judgment results in that the one data group has no irrecoverable failure which has occurred therein. Finally, the access is stopped to the one data group when the judgment results in that the one data group has an irrecoverable failure which has occurred therein.
摘要翻译：公开了一种DASD访问控制方法，包括存储用于识别存在于构成双工DASD对的第一和第二DASD的每一个中的多个数据组中发生不可恢复的故障的一个数据组的信息。基于存储的信息确定一个数据组是否具有在保持在构成双面DASD对的第一和第二DASD中的一个数据组中的一个数据组被多个存储器中的一个访问时发生的不可恢复的故障处理单位。当判断结果是一个数据组中没有发生不可恢复的故障时，由一个处理单元允许在一个DASD中的一个数据组访问。最后，当判断结果是一个数据组在其中发生了不可恢复的故障时，停止对一个数据组的访问。

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