Patent ID: 7664921
Filing Date: 2010-02-16
Classification: G06F

Abstract:
1. An access method for accessing first shared memory cards of an operating system and second shared memory cards of a standby system of redundant configuration, the access method comprising: executing data transmission and reception between a plurality of processor cards and the first and second shared memory cards by the processor cards and the first and second shared memory cards, the processor cards being individually connected to each of the first and second shared memory cards on a one to one basis using serial buses; storing, by one of the first shared memory cards and one of the second shared memory cards, a command sent from one of the processor cards in the one of the first shared memory cards and the one of the second shared memory cards; and discarding, by the one of the second shared memory cards, the command stored in the one of the second shared memory cards when the one of the second shared memory cards receives a response for the command from the one of the first shared memory cards within a given time, and processing, by the one of the second shared memory cards, the command stored in the one of the second shared memory cards when the one of the second shared memory cards does not receive the response for the command from the one of the first shared memory cards within the given time.