>>> B DKA0 –FLAG 0,1
SYSBOOT> SET/START=OPA0:
SYSBOOT> CONTINUE

The system will boot to the $ prompt.  Spawn a subprocess to stay logged on to the console; then run the system startup procedure.

$ SET NOON
$ SPAWN
%DCL-S-SPAWNED, process SYSTEM_1 spawned
%DCL-S-ATTACHED, terminal now attached to process SYSTEM_1
$ @SYS$SYSTEM:STARTUP

The system will come up normally and give back the $ prompt when the startup procedure logs out. From there, spawn again to prevent being logged out of the console.  It will not e possible to work on the system.

$ SET NOON
$ SPAWN
%DCL-S-SPAWNED, process SYSTEM_1 spawned
%DCL-S-ATTACHED, terminal now attached to process SYSTEM_1
$ SET DEF SYS$SYSTEM:

When finished, do another conversational boot and reset the startup file.

>>> B DKA0 –FLAG 0,1
SYSBOOT> SET/START=SYS$SYSTEM:STARTUP.COM
SYSBOOT> CONTINUE