HP OpenVMS 8.x manual Booting Without Startup and Login Procedures, Example

3.To avoid starting all layered products on a system that is not tuned for them, possibly causing the system to hang, set the STARTUP_P1 system parameter as follows:

SYSBOOT> SET STARTUP_P1 "MIN"

4.Enter the following command to ensure that the operating system does not record for subsequent system reboots the STARTUP_P1 parameter change you made in step 3:

SYSBOOT> SET WRITESYSPARAMS 0

5.Enter the following command to continue booting:

SYSBOOT> CONTINUE

6.When the system finishes booting, determine which changed parameter caused the problem and reset the parameter value. If you specified the value for the parameter in the AUTOGEN parameter file MODPARAMS.DAT, fix the value in that file and run AUTOGEN. For more information, see the HP OpenVMS System Manager's Manual, Volume 2: Tuning, Monitoring, and Complex Systems.

7.After your system runs for at least 24 hours, run AUTOGEN in feedback mode, following the steps described in Section 7.22 (page 144). Be sure to examine the AGEN$PARAMS.REPORT, as recommended. If necessary, modify system parameters as instructed in Section 7.23 (page 145). If you need assistance, contact your software support representative. Once you feel confident that the problem is corrected, and AUTOGEN has been run through the SETPARAMS phase, reboot the system.

Example

SYSBOOT> USE DEFAULT

SYSBOOT> SET STARTUP_P1 "MIN"

SYSBOOT> SET WRITESYSPARAMS 0

SYSBOOT> CONTINUE

Username: SYSTEM

Password:

$ EDIT SYS$SYSTEM:MODPARAMS.DAT

.

.

.

[Insert line(s) to reset parameter value(s)]

.

.

.

A.6.12.2 Booting Without Startup and Login Procedures

If the system does not complete the startup procedures or does not allow you to log in, you might need to bypass the startup and login procedures. The startup and login procedures provided by HP should always work. However, if you introduce an error when you modify the startup or login procedure, you could accidentally lock yourself out of the system.

How to Perform This Task

1.Begin the conversational boot by entering the following command at the EFI Shell prompt, where fsn: (such as fs1:) is the device associated with the system disk:

Shell> fsn:\efi\vms\vms_loader.efi -flags 0,1

2.Enter the following command at the SYSBOOT> prompt:

SYSBOOT> SET/STARTUP OPA0:

3.Enter the following command to ensure that the operating system does not record for subsequent system reboots the STARTUP_P1 parameter change you made in step 2:

SYSBOOT> SET WRITESYSPARAMS 0

4.Enter the following command to continue booting:

SYSBOOT> CONTINUE

182 Configuring OpenVMS I64 Hardware Operation and Boot Operations, and Booting and Shutting Down Your System