Patent ID: 7725761
Filing Date: 2010-05-25
Classification: G06F

Abstract:
1. A computer system comprising: a CPU; a memory; a bus; an IO bridge which connects an IO device to the bus; and a pseudo-IO bus bridge, wherein the pseudo-IO bus bridge is disconnected from the bus during a redundant configuration in which a second computer system is connected to the bus, wherein the second computer system comprises: wherein the pseudo-IO bus bridge holds a setting information of the IO bridge to emulate the second IO bridge during a stand-alone configuration in which the second computer system is disconnected from the bus, and wherein the computer system is configured such that a total amount of memory space assigned to the IO bridge, the second IO bridge, and the pseudo-IO bus bridge when the second computer system is connected to the bus is substantially the same as a total amount of memory space assigned to the IO bridge, the second IO bridge, and the pseudo-IO bus bridge when the second computer system is disconnected from the bus.