System Overview 1-7
SRM Console
The SRM console is a command-line interface that is used to boot the DIGITAL
UNIX and OpenVMS operating systems. It also provides support for examining and
modifying the system state and configuring and testing the system. The SRM
console can be run from a serial terminal or a graphics monitor.
AlphaBIOS Console
The AlphaBIOS console is a menu-based interface that supports the Microsoft
Windows NT operating system. AlphaBIOS is used to set up operating system
selections, boot Windows NT, and display information about the system
configuration. The EISA Configuration Utility and the RAID Standalone
Configuration Utility are run from the AlphaBIOS console. AlphaBIOS runs on
either a serial or graphics terminal. Windows NT requires a graphics monitor.
Environment Variables
Environment variables are software parameters that define, among other things, the
system configuration. They are used to pass information to different pieces of
software running in the system at various times. The os_type environment variable,
which can be set to VMS, UNIX, or NT, determines which of the two consoles is
used. The SRM console is always brought into memory, but AlphaBIOS is loaded if
os_type is set to NT and the Halt LED is not lit.
Refer to Appendix B of this guide for a list of the environment variables used to
configure a1200 system.
Refer to the AlphaServer 1200 Owner’s Manual for information on setting
environment variables.
Most environment variables are stored in the NVRAM that is placed in a socket on
the system motherboard. Even though the NVRAM can be removed and replaced on
a new system motherboard, it is recommended that you keep a record of the
environment variables for each system that you service. Some environment variable
settings are lost when a module is swapped and must be restored after the new
module is installed. Refer to Appendix B for a convenient worksheet for recording
environment variable settings.
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