System and method for data multiplexing

Details System and method for data multiplexing System and method for data multiplexing

2006-06-27

2006-06-27

Kizou, Hassan (Department: 2666)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C711S161000, C711S162000, C370S429000, C370S216000

Reexamination Certificate

active

07069467

ABSTRACT:
To reduce the load on a host for controlling a data doubling. Between a host and two disk subsystems, there is connected a data doubling device. This data doubling device behaves as if it were a unit disk subsystem for the host. The data doubling device doubles a data I/O instruction from the host and issues the doubled data I/O instruction to two disk subsystems. In case either of the disk subsystems becomes faulty, the data doubling device sends the data I/O instruction from the host only to the normal disk subsystem. After the fault recovery, the data doubling device performs a data copy between the disk subsystems.

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