Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2005-08-09
2005-08-09
Bonso, Bryce P. (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S012000
Reexamination Certificate
active
06928583
ABSTRACT:
An apparatus and method for a first computing element and a second computing element to execute in lockstep in a fault-tolerant server. In one embodiment, the first computing element provides a first instruction to a communications link and the second computing element provides a second instruction to a communications link. In one embodiment, a first local input-output (I/O) subsystem and a second local I/O subsystem are each in communication with the communications link. The first and/or the second local I/O subsystem compare the first instruction and the second instruction. In one embodiment, the first and second local I/O subsystems indicate a fault of the first computing element or the second computing element. Such a fault may be determined by a miscompare of the first instruction and the second instruction.
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Griffin Gerry
McLoughlin Michael
Bonso Bryce P.
Chu Gabriel L
Kirkpatrick & Lockhart Nicholson & Graham LLP
Stratus Technologies Bermuda Ltd.
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