Asus RS100-E4/PI2 - Manual (Page 115)

ASUS RS100-E4/PI2 6-17
10. When finished setting the selected logical drive configuration, select
Accept from the menu, then press <Enter>.
11. Follow steps 5 to 10 to configure additional logical drives.
12. When prompted, save the configuration, then press <Esc> to return to
the Management Menu.