Patent
1996-05-20
1998-04-07
Beausoliel, Jr., Robert W.
3951821, G06F 1116, G06F 1122
Patent
active
057375135
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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Akeura Nobuo
Hyuga Kazuhiro
Kayukawa Satoru
Matsuda Koji
Miyazaki Naoto
Baderman Scott T.
Beausoliel, Jr. Robert W.
Hitachi , Ltd.
Hitachi Information & Control Systems Inc.
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