A-8
AlphaServer DS20 Service Manual
A.5
Summary of SRM Environment Variables
Environment variables pass configuration information between the console and
the operating system. Their settings determine how the system powers up, boots
the operating system, and operates. Environment variables are set or changed
with the set envar command and returned to their default values with the clear
envar command. Their values are viewed with the show envar command. The
SRM environment variables are specific to the SRM console.
Table A-3 Environment Variable Summary
Environment
Variable
Function
auto_action
Specifies the console’s action at power-up, a failure, or a reset.
bootdef_dev
Specifies the default boot device string.
boot_osflags
Specifies the default operating system boot flags.
com*_baud
Changes the default baud rate of the COM1 or the COM2
serial port.
console
Specifies the device on which power-up output is displayed
(serial terminal or graphics monitor).
cpu_enabled
Enables or disables a specific secondary CPU.
ew*0_mode
Specifies the connection type of the default Ethernet
controller.
ew*0_protocols
Specifies network protocols for booting over the Ethernet
controller.
kbd_hardware_
type
Specifies the default console keyboard type.
kzpsa*_host_id
Specifies the default value for the KZPSA host SCSI bus node
ID.
language
Specifies the console keyboard layout.
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