I/O device having check recovery function

Details I/O device having check recovery function I/O device having check recovery function

1996-09-30

1999-03-02

Lall, Parshotam S.

395823, 395569, G06F 1110, G06F 1100, G11B 2018

Patent

active

058782028

ABSTRACT:
When a data write request is received from an application program, the received data write request is issued to a disk (primary) without waiting next check point, and the data write request is issued to a disk (shadow) after obtaining next check point. When restarting a process from obtained preceding check point, data in the disk (primary) is recovered by data in the disk (shadow). As a result, a delay of I/O request by a check point is decreased, thereby remarkably improving system performance in a normal operation.

REFERENCES:
patent: 5191584 (1993-03-01), Anderson
patent: 5379417 (1995-01-01), Lui et al.
patent: 5463765 (1995-10-01), Kakuta et al.
patent: 5734814 (1998-03-01), Corbin et al.
B. Srinivasan et al., "Recoverable file system for microprocessor system for microprocessor systems, " vol. 9, No. 4 (May 1985) , pp. 179-183.

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