Importance

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Abstract

In method and apparatus for restarting, after occurrence of a fault, an online processing system based on a computer employing a virtual storage system comprised of a main storage and a first auxiliary storage, a second auxiliary storage is additionally provided, occupied/unoccupied status of slots on the first auxiliary storage is managed by an auxiliary storage management table of the main storage, data present in the main storage immediately after IPL is saved in a first area of the second auxiliary storage, data present in the main storage at the time of the occurrence of the fault is saved in a second area, and data occuring in the auxiliary storage management table at the time of the occurrence of the fault is saved in a third area. When restarting the system after the occurrence of the fault, the contents of the first area of the second auxiliary storage is reloaded on the main storage, and the data saved in the third area of the second auxiliary storage is registered in the auxiliary storage management table of the main storage. When dumping data present at the time of the occurrence of the fault, the data saved in the second area of the second auxiliary storage is dumped to the external storage and data present in the first auxiliary storage at the time of the occurrence of the fault is dumped to the external storage in accordance with the data saved in the third area of the second auxiliary storage.

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First Claim