Digital Equipment Digital AlphaStation 400 Series, User Information

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Console Commands
Environment Variables
Table A-13 shows selected environment variables and their descriptions (for a complete
list, type show * at the SRM prompt).
Table A-13. SRM Environment Variables
Variable Description
auto_action
Sets/shows the console action following an error, halt, or power-up.
The action can be halt, boot, or restart. Halt is the default.
boot_file
Sets/shows the file name to be used when a bootstrap requires a file
name. The default setting is null.
boot_osflags Sets/shows additional parameters to be passed to system software.
When using OpenVMS software, these parameters are the system
root number and boot flags. The default setting is 0,0.
bootdef_dev Sets/shows the default device or device list from which the system
attempts to boot. If the system software is preloaded, the variable is
preset to point to the device containing the preloaded software.
Otherwise, the default value is null.
console Sets the console output to either serial port or the graphics controller.
control_scsi_term Internal: The SCSI is internally terminated at both ends. Do not add
any external devices when the variable is set to this value. This is
the default setting.
External: The SCSI bus is internally terminated at one end. The
other end of the SCSI bus must be terminated externally at the last
external device in the SCSI chain.
os_type Sets/shows the specified operating system (NT, OpenVMS, or OSF)
that NVRAM boots.
pci_parity
This variable controls PCI parity checking at the PCI bridge chip.
Parity checking is performed if on, disabled if off, and dependent on
the SCSI controller revision if sniff.
A-16