Patent ID: 7610509
Filing Date: 2009-10-27
Classification: G06F

Abstract:
1. A fault tolerant (FT) computer system comprising: a first system as an active system comprising first I/O devices; and a second system as a standby system comprising second I/O devices, which are the same as said first I/O devices, said second system connected with said first system through a link section, and configured to operate in synchronization with said first systems; wherein each of said first and second systems comprises a CPU; wherein said first system comprises an operating system (OS) and a routing controller connected with the CPU of said first systems; wherein said routing controller in said first system is configured to control a routing between said CPU in said first system and said first and second I/O devices; wherein the first and second systems are configured such that the second I/O devices are not visible to the OS of the first system before a fault has occurred in one of said first I/O devices; and wherein, when a fault has occurred in one of said first I/O devices, said routing controller in said first system is configured to route a request data, received from said CPU in said first system and destined to said first I/O device, to one of said second I/O devices corresponding to said first I/O device with the fault.