I plan to DDRed my system disks 540RES, 540SPL, 540W01, 540W02, before I apply maintenance to Level 1 and PUT2PROD, so that I have a *hot* fallback when I IPL. the maintenance.
How can I be sure the IPL will not pick up these standby disks but WILL pick them up if I need them for fallback? Is just changing the 540RES IPL address enough?
