Troubleshooting guide

4-4 DS20E Reference Guide
Compaq Confidential – Need to Know Required
Writer: Robert Young Project: Compaq AlphaServer DS20E System Comments:
Part Number: FR-K8F6W-UA .A01 File Name: e-ch4 Operating the System.doc Last Saved On: 10/4/99 2:40 PM
boot_osflags
The boot_osflags environment variable sets the default boot flags and, for
OpenVMS, a root number.
Boot flags contain information used by the operating system to determine
some aspects of a system bootstrap. Under normal circumstances, you can use
the default boot flag settings.
To change the boot flags for the current boot only, use the flags_value
argument with the boot command.
The syntax is:
set boot_osflags flags_value
The flags_value argument is specific to the operating system.
Tru64 UNIX Systems
UNIX systems take a single ASCII character as the flags_value argument.
a
Load operating system software from the specified boot device (autoboot). Boot to
multiuser mode.
i
Prompt for the name of a file to load and other options (boot interactively). Boot to
single-user mode.
s
Stop in single-user mode. Boots /vmunix to single-user mode and stops at the # (root)
prompt.
D
Full dump; implies “s” as well. By default, if UNIX crashes, it completes a partial
memory dump. Specifying “D” forces a full dump at system crash.