Hey all, don't mean to hijack this thread, but thought folks on here might be the closest to an answer. I have 2 older systems: L2 controller, Numalink router and 6 bricks (base io and MPX modules) all orgin 350s of the same vintage as this thread. Does anyone know or have found a hack to be able to mix bricks from 2 different systems with different serial numbers, and still be able to use all CPUs across the cluster? My understanding is SGI implemented a hardware check that if you remove one of the bricks from the cluster (lets say baseIO) and replace it with a brick from a different stack, they check for this and it doesn't work. In fact it doesn't work.../var/adm/SYSLOG shows only the boot brick CPUs being used and all other (5 bricks) throwing a bunch CPU exception errors and being de-allocated. If anyone has any ideas how to hack/use bricks from different systems (serial numbers), that would be awesome. I am trying to keep a critical system going and the 20 year old parts are failing one at a time...thanks a lot for any help in advance.