Installation manual

Before Upgrading the OpenVMS VAX Operating System

5.5 Preparing the System Disk

5.5.11 Add Modiﬁed System Parameters to MODPARAMS.DAT

Any system parameter values that you modiﬁed and did not enter in

MODPARAMS.DAT are lost during the upgrade. To retain the values of

these parameters, enter their names in MODPARAMS.DAT and the value

that AUTOGEN needs to add to the default minimum value.

For example, if you modiﬁed GBLPAGES by 128 pages above the default, add the

following line to SYS$SYSTEM:MODPARAMS.DAT:

ADD_GBLPAGES=128

When AUTOGEN runs after the upgrade, it uses the values in

MODPARAMS.DAT.

Section 5.6 tells you how to get your system ready for an upgrade.

5.6 Preparing the System

To prepare the system for the upgrade, use the procedure described in the

following sections.

5.6.1 Enable Auto Restart or Manual Reboot

If your computer uses console media, set the computer to restart automatically.

For some VAX computers this means setting one or more switches. For others,

this means entering certain console mode commands. To determine how to enable

auto restart, refer to the upgrade and installation supplement for your VAX

computer.

If you have a system that does not use console media, set your system so you can

reboot it manually. For more information, refer to the upgrade and installation

supplement for your VAX computer.

5.6.2 Shut Down and Reboot the System

Shut down and reboot the system to activate any system parameters that you

changed (STARTUP_P1, for example). To shut down the system, enter the

following command:

$ @SYS$SYSTEM:SHUTDOWN

When the procedure asks if an automatic system reboot should be performed,

type Y (for YES) and press Return.

After the system reboots, log in to the SYSTEM account.

5.6.3 Prevent Interactive Logins

To prevent users from logging in to the system during the upgrade, enter the

following command:

$ SET LOGINS/INTERACTIVE=0

5.6.4 Check for DECnet for OpenVMS

To determine whether your system is running DECnet for OpenVMS software,

enter the following command:

$ SHOW LOGICAL SYS$NODE

5–12 Before Upgrading the OpenVMS VAX Operating System