I have set up a VMS 4.7 machine on SIMH (using the 3900 emulation) but I can't see how to set up clustering. The only cluster-related procedures I have in SYS$MANAGER are MAKEROOT.COM, BOOT_CONFIG.COM and SATELLITE_CONFIG.COM. They all tell me "This system disk is not set up as a cluster system disk." I cannot see how to get started to make the system a cluster system disk, can anyone tell me what the first step is? Thanks Rob