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1. 发明授权

US4608688A Processing system tolerant of loss of access to secondary storage 失效
标题翻译：处理系统容忍对二级存储器的访问丢失
公开(公告)号：US4608688A
公开(公告)日：1986-08-26
申请号：US566021
申请日：1983-12-27
申请人： Robert C. Hansen , Calvin J. Richardson , David A. Schmitt
发明人： Robert C. Hansen , Calvin J. Richardson , David A. Schmitt
IPC分类号： G06F3/06 , G06F11/00 , G06F11/20 , G06F12/00 , G06F12/16 , G11C29/00 , G06F11/16
CPC分类号： G06F11/1662 , G06F11/1482 , G06F11/2028 , G06F11/2046 , G06F11/2094 , G06F11/2097 , G11C29/74 , G06F11/2038
摘要： In a processing system (100) that swaps processes between a main memory (114 or 124) and a pair of duplicated disks (132, 142), system processing capability is protected against loss of access to both system-essential duplicated disks. Upon loss of access to one duplicated disk, processes designed as essential to the system's operation and not resident in the main memory are swapped into the main memory from the other duplicated disk. All essential processes are then locked into the main memory to prevent their removal therefrom. Thus the essential processes remain accessible to the processing system even upon loss of access to both of the disks. Upon loss of access to both of the disks, the system may undergo reconfiguration in an attempt to regain access to at least one of the disks. If reconfiguration fails, non-essential processes are killed and the system continues processing using only the essential processes. Upon restoration of access to one of the disks, the restored disk is initialized from tape and the system is then bootstrapped from the restored disk, and normal processing is resumed. Upon restoration of access to the second disk, the second disk is repopulated from the first disk and the essential processes are unlocked from the main memory.
摘要翻译：在交换主存储器（114或124）和一对复制盘（132,142）之间的处理的处理系统（100）中，保护系统处理能力以免对两个系统重要的复制盘的访问丢失。在丢失访问一个重复的磁盘时，被设计为系统操作必不可少且不驻留在主存储器中的进程被从另一个重复的磁盘交换到主存储器中。然后将所有基本过程锁定到主存储器中，以防止从其中移除。因此，即使丢失访问这两个磁盘，处理系统仍然可以访问基本过程。在丢失对这两个磁盘的访问时，系统可以经历重新配置以试图重新获得对至少一个磁盘的访问。如果重新配置失败，则非基本进程将被终止，并且系统仅使用必要的进程继续处理。在恢复对其中一个磁盘的访问后，从磁带初始化还原的磁盘，然后从恢复的磁盘引导系统，并恢复正常处理。在恢复对第二盘的访问时，第二盘从第一盘重新填充，并且主要进程从主存储器解锁。

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