HP OpenVMS 8.x manual Booting with Minimum Startup, Booting with the XDelta Utility Xdelta

Table A-2 SYSGEN Commands Used in the SYSBOOT Procedure (continued)

Command	Description
HELP	Displays a summary of the SYSBOOT commands on the terminal screen.
SET parameter-name	Establishes the value of a system parameter.
SET/STARTUP	Sets the name of the system startup command procedure.
SHOW [parameter]	Displays active, current, default, maximum, and minimum values for specific
	parameters. (Use qualifiers to display characteristics of parameters grouped
	by categories.)
USE [file-spec]	Specifies a parameter file to be used as a source of values. You must enter the
	entire file specification, including device and directory; you cannot specify a
	logical name.
USE DEFAULT	Specifies that default values be used for all parameters.

For examples of conversational booting, see Section A.6.9 (page 180) and Section A.6.12 (page 181).

A.6.9 Booting with Minimum Startup

In certain cases, you might want to boot your system without performing the full sequence of startup events. For example, if a startup event prevents you from logging in, you might want to boot the system without executing the startup so that you can log in and fix the problem. You can use the conversational boot to specify a minimum startup.

NOTE: Because this procedure bypasses specific startup operations, it does not autoconfigure the system's peripheral devices.

Boot the system with minimum startup as follows:

1.Begin the conversational boot by entering the following command at the EFI Shell prompt, where fsn: is the device (such as fs1:) associated with the system disk and the system root is [SYS0...]:

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

2.Enter the following command:

SYSBOOT> SET STARTUP_P1 "MIN"

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

A.6.10 Booting with the XDelta Utility (XDELTA)

The XDelta utility (XDELTA) is a debugging tool that system programmers use. The procedure for booting all Integrity servers with XDELTA is the same.

The following table describes the valid values you can specify when booting with XDELTA:

Value System Response

0Normal, nonstop boot (default).

1Begins a conversational boot and then displays the SYSBOOT prompt.

2Includes XDELTA but does not take the initial breakpoint.

3Displays the SYSBOOT prompt and includes XDELTA but does not take the initial breakpoint.

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