Steps to clear if Mirror is maintenance state

Submirror 0: d31 State: Needs Maintenance Submirror 1: d32
metadetach d30 d32
metadetach -f d30 d32
metaclear d32
metastat -p
metainit -f d32 1 1 c0t1d0s5
metattach d30 d32
metastatgrep -i progress