Computer, a method of connecting devices to data bus controllers, a method of allocating the bandwidth of a plurality of data bus controllers and apparatus therefor

摘要

A computer having a plurality of data bus controllers, a plurality of grouped controller ports and a plurality of connection elements for connecting the controllers to the ports, wherein each controller has a maximum available controller bandwidth; characterized in that the connection elements are arranged such that each controller is connected to ports from different groups such that data pathways between the controllers and the ports are not variable, and a maximum port group bandwidth available to each port group cannot be changed, irrespective of a bandwidth demand at said each port group.