Cache/disk subsystem with file number for recovery of cached data

摘要: In a cache/disk sybsystem employing the post-store technique, each file is assigned number. The number an address in directory on disk, this containing pointers to physical disk space that file. During normal operation of subsystem device and are utilized transfer written-to segments data from cache store disk. If failure occurs which prevents cache-to-disk segment data, storage control unit forms status word sense message. message includes information defining fault. A host processor then notified available. obtains indexes into action branch table. table entry directs issue Sense I/O command obtain identifying executive program may subsequently utilize message, also number, assign new at be recorded. could not written first read processor. issues write newly space.