Minimum Boot
Posted: Thu Jan 21, 2021 2:43 pm
In order to recover from a system with a faulty setup that means that logging in after a normal boot is impossible (e.g. exhausted pagefile), a minimum boot can be executed which will bypass the SYSTARTUP_VMS.COM
From the console, boot to SYSBOOT
On VAX
On Alpha
In SYSBOOT
Once logged in, reset to a normal boot sequence
And finally reboot
From the console, boot to SYSBOOT
On VAX
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>>> b/e0000000 dua0
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>>> boot -flags 0,1 dka0
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SYSBOOT> SET STARTUP_P1 "MIN"
SYSBOOT> CONTINUE
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$ run sys$system:sysboot
SYSBOOT> PARAMETERS USE CURRENT
SYSBOOT> PARAMETERS SET STARTUP_P1 ""
SYSBOOT> PARAMETERS WRITE CURRENT
SYSBOOT> EXIT
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$ @SYS$SYSTEM:SHUTDOWN