Method of and system for verifying operation concurrence in maintenance/replacement of twin CPUs
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United States of America Patent
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Apr 7, 1998
Grant Date -
N/A
app pub date -
May 20, 1996
filing date -
May 24, 1995
priority date (Note) -
Expired
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Abstract
A method of verifying operation concurrence in maintenance/replacement of twin CPUs employed in a dual-CPU computer wherein a replacement CPU with an initial fault may have been installed by mistake during on-line maintenance/replacement work and a system therefor are disclosed whereby a failure which, without the method and the system, would occur due to the initial fault of the replacement CPU during a dual subsystem synchronous operation carried out thereafter by the computer can be prevented from entailing a system down on both the subsystems.
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