In addition to the base requirements, action is required for logger structures to become eligible for system-managed duplexing when there are existing structure connections. Note that simply causing a rebuild for logger structures will not satisfy the configuration or environment necessary for migrating existing structures to becoming duplexed.

Additionally, it is not necessary to take the entire sysplex down at one time in order to switch to duplex mode. Only the systems that have connections to the structures of interest will require action to be taken, causing Logger to newly connect to the structure with the appropriate options so system-managed duplexed structures can be used.