ok the answer seems to be svc_arrayconfig -s generates both emc config info and because we use -s, user data.   This is a series of csv files in a gzipped tar bundle. This cannot be immediatly piped into a recreate state tool, but does provide a state snapshot.
I am looking to backup unity array config & user state. For unity array config, I suspect I am looking at the service command svc_arrayconfig For the user state, ie I am unsure of recommended tool - can I get a recommendation ?
Backup config and user state