Do dual CPUs on a modern server actually provide redundancy? If one fails can the server be rebooted and run on the remaining CPU?
In the past I have come across the case where CPU 0 always had to be present so if CPU 1 had failed it would reboot fine but if CPU 0 failed you had to physically swap CPU 1 intyo the cpu 0 socket. I would hope this restriction is no-longer present in modern dual CPU servers but wanted to confirm that.
I have actually been told by HP that dual CPUs do not offer any redundancy because they both have to be present but not sure that is correct.