Error windowing for storage subsystem recovery

Details Error windowing for storage subsystem recovery Error windowing for storage subsystem recovery

1994-12-30

1996-07-23

Beausoliel, Jr., Robert W.

Excavating

371 471, G01R 3128, G06F 1100

Patent

active

055398758

ABSTRACT:
In a hierarchical, multi-level storage system, recovery from intermittent storage hardware failures is supported by establishing hardware checkpoints at storage system interfaces and by duplication of subsystem hardware within units of the storage system. When error is detected at an interface, all levels of the storage system are quiesced and backed up to a point preceding the occurrence of the error. If a hardware failure causes an error, the system is quiesced while the failed hardware is reconfigured with control logic copied from duplicate hardware. A single restart command restarts system operation.

REFERENCES:
patent: 4974147 (1990-11-01), Hanrahan
patent: 5056091 (1991-10-01), Hunt
patent: 5255367 (1993-10-01), Bruckert
patent: 5317726 (1994-05-01), Horst
patent: 5331673 (1994-07-01), Elko
patent: 5398331 (1995-03-01), Huang

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