Disassociating a service profile from a server in Cisco UCS Manager is the process of removing the server's logical identity, which includes its UUID, MAC addresses, WWNs, firmware policies, and boot order. As a fundamental part of this action, UCS Manager gracefully shuts down the physical server. This returns the server to an unconfigured state, making it available for association with a different service profile or for physical decommissioning. The server hardware is effectively wiped of its personality and powered off.

A. It reboots the primary Fabric Interconnect immediately: Disassociating a profile from a single server is a server-specific operation and does not trigger a disruptive, domain-wide event like rebooting a Fabric Interconnect.

B. It recalculates the power allotment for each blade server within the chassis: While powering down a server frees up power in the chassis budget, UCS Manager does not actively recalculate the allotment for other running servers. The primary action is the server shutdown itself.

C. It reboots the secondary Fabric Interconnect immediately: Similar to option A, this is an incorrect and highly disruptive action that is not related to managing a single server's service profile.

1. Cisco UCS Manager GUI Configuration Guide, Release 4.0, Managing Service Profiles, Section: "Disassociating a Service Profile from a Server".

The documentation states: "When you disassociate a service profile from a server, the server is shut down and the association with the server is removed. All identity and configuration information is removed from the server and returned to the pools."

2. Cisco UCS Manager Administration Guide, Release 2.2, Chapter: Service Profiles, Section: "Disassociating a Service Profile".

This guide confirms the action: "When you disassociate a service profile, the server associated with the profile is shut down, and the server is disassociated from the profile. All vHBAs and vNICs are un-bound from the server, and their MAC addresses and WWNs are returned to the appropriate pools."