Importance

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Abstract

A redundant bus bridge system for communicating between a first bus and a second bus includes a first clock generator operative to produce a first clock signal and a second clock generator operative to produce a second clock signal. A first bus bridge, e.g., a first RAID controller, connects the first bus and the second bus and is responsive to the first clock generator and the second clock generator. The first bus bridge is operative to transfer data between the first bus and the second bus in synchronism with a selected one of the first clock signal and the second clock signal. A second bus bridge, e.g., a second RAID controller, connects the first bus and the second bus and is responsive to the first clock generator and the second clock generator. The second bus bridge is operative to transfer data between the first bus and the second bus in synchronism with a selected one of the first clock signal and the second clock signal. According to aspects of the present invention, the first bus bridge is operative to transfer data between the first bus and the second bus in synchronism with the second clock signal when the second bus bridge is operational, and the first bus bridge is operative to transfer data between the first bus and the second bus in synchronism with the first clock signal when the second bus bridge is non-operational.

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First Claim