SCF Reference Manual for G-Series RVUs (G06.24+)

Using SCF to Configure and Manage NonStop

S-Series Servers

SCF Reference Manual for G-Series RVUs—520413-004

1-12

What Happens at Normal System Load

Normal system load occurs when you want to load the system using the existing

CONFIG file. The steps are as follows:

1. Start the system from a system console, specifying the CONFIG current system

configuration file on the $SYSTEM.ZSYSCONF subvolume.

2. When the system starts and displays a TACL prompt, you can log on and start the

rest of the system applications.

How to Return to a Saved Configuration

You can load an earlier version of the system configuration database by specifying a

saved version of the CONFIG file. You can use this method to switch quickly to an

alternate configuration (for example, if you use different configurations for day or night

operations). Or you can use this method to recover from a configuration change that

caused a problem (for example, a system freeze). The steps are as follows:

1. Load the system from a system console, specifying a saved version of the system

configuration file, in the form xx.yy. For example, the CONF0205 file would be

specified as 02.05 in the OSM or TSM dialog box. (Entering just 2.05 or 2.5 will

also work.)

2. When the system starts and displays a TACL prompt, you can log on and start the

rest of the system applications.

3. Enter an INFO SUBSYS $ZZKRN command to verify that no pending changes to

system attributes are displayed. If the display erroneously shows any pending

changes, enter an ALTER SUBSYS command to change these values to match

the current settings.

This misleading pending changes display can occur if you load the system from an

earlier configuration (either a CONFxxyy or the CONFBASE file) and that earlier

configuration has different system name, number, or time attributes than the

configuration being replaced. For example, if you load the \EAST system from the

CONFBASE file (which specifies \NONAME as the system name), an INFO

SUBSYS command displays \EAST as the current system and \NONAME as a

pending change. Entering an ALTER SUBSYS command to change the system

name to \EAST causes the pending change to disappear from a subsequent INFO

SUBSYS command.

Getting a Corrupt System Configuration File Analyzed

If the current system configuration file somehow becomes corrupt, you can send it to

your service provider to have the cause determined.

1. Return to a saved, stable configuration by following the procedure How to Return

to a Saved Configuration on page 1-12.