This is the percent-complete progress, from 0 to 100, of the FSM stage currently running for this UCS M-Series modular server slot endpoint. An admin watching a long-running operation on the M-Series slot — like a full rediscovery — uses this to tell whether it is still actively progressing or has stalled at a fixed percentage, which is the difference between waiting and escalating. A value of 45 means the current stage is 45 percent complete; a value stuck at the same number over several polls suggests the stage has hung.