A.1.5 booting with minimum startup, A.1.6 booting with the xdelta utility (xdelta), A.1.7 booting from a different root directory – HP BA322 90087 User Manual
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For examples of using conversational booting, see
and
A.1.5 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 BOOT command in the following format:
BOOT -FLAGS 0,1 [
device-name]
For device-name, substitute the device name of the drive from which you want to boot. For
example, if the system disk has a device name of DKA400, enter the following command
and press Enter:
>>> BOOT -FLAGS 0,1 DKA400
2.
Enter the following command and press Enter:
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.1.6 Booting with the XDelta Utility (XDELTA)
The XDelta utility (XDELTA) is a debugging tool that system programmers use. The procedure
for booting all Alpha computers with XDELTA is the same.
The following table describes the valid values you can specify when booting with XDELTA:
System Response
Value
Normal, nonstop boot (default).
0
Begins a conversational boot and then displays the SYSBOOT prompt.
1
Includes XDELTA but does not take the initial breakpoint.
2
Displays the SYSBOOT prompt and includes XDELTA but does not take the initial breakpoint.
3
Includes XDELTA and takes the initial breakpoint.
6
Includes XDELTA, displays the SYSBOOT prompt, and takes the initial breakpoint at system
initialization.
7
The following is an example of booting with XDELTA from the console prompt:
>>> BOOT -FLAGS 0,7
For more information about using XDELTA, see the HP OpenVMS Delta/XDelta Debugger Manual.
A.1.7 Booting from a Different Root Directory
By default, the OpenVMS Alpha operating system is installed in the system root directory [SYS0].
However, if you have created a cluster system disk, you can use the
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Booting and Shutting Down Your OpenVMS Alpha System