For system-managed rebuild, the presentation of the Structure State Change event (Cleanup phase) is the point at which the system-managed process commits to the new structure. When a loss of coupling facility connectivity occurs prior to this point, a system-managed rebuild will continue across the loss of connectivity to the old or the new structure only if the failure does not affect systems on which there are active connectors to the structure being rebuilt. A loss of connectivity might force the system to select other systems to carry out system-managed processing that was disrupted by the failure.

For system-managed duplexing rebuild, before the Duplex Established phase, the primary structure is the only viable copy of the structure. When active connections have lost connectivity to the primary structure, or when all systems have lost connectivity such that system-based processing cannot complete, duplexing rebuild will stop to fall back to the primary structure and then report a Loss of Connectivity event upon completion of the Rebuild Stop process.