Hi,
OA stores the Enclosure Serial Number, for more information.
OA firmware also has some enhancements, for example, Version:3.20(A) "Added support for automatically restoring the Enclosure’s Serial Number on a mid-plane replacement. This feature requires that all the OA modules and fans be plugged back into the enclosure before power is applied. Changing power supplies during the midplane service event will not impact this feature."
You may also refer to Architecture and technologies in the HPE BladeSystem c7000 Enclosure.
Thank You!
I am an HPE Employee
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