The following sections describe halt and shutdown
operations for Alpha computers.
A.3.1 Halting the System
During installation, upgrade, and related system
operations, you might need to halt your system. The methods for halting
Alpha computers differ slightly with certain models, as described
in the next section.
The following table summarizes the ways you can
halt specific Alpha computers:
Alpha
Computer
How to
Halt
AlphaServer 300, 800, 1000, 1200, 2000, 2100 series
Do one of the following:
Press Halt.
Press Ctrl/P.
AlphaServer 8200, 8400 series
Press Ctrl/P.
AlphaStation 200, 400, 500, 600 series
Do one of the following:
Press Halt (if the graphics monitor
is serving as the console).
Press Ctrl/P (if
you are using the alternate console and port).
DEC 2000, 3000 series
Do one of the following:
Press Halt (if the graphics monitor
is serving as the console).
Press Ctrl/P (if
you are using the alternate console and port).
DEC 4000 series
Do one of the following:
Press the Halt.
Press Break on the console (the default
setting).
Press Ctrl/P, but
only after using the console command SET TTA0_HALTSn to enable this key combination, where n can
be 6 (enables the Break key and Ctrl/P) or 2 (enables Ctrl/P but disables the Break key).
DEC 7000, 10000 series
Press Ctrl/P.
A.3.2 Shutting Down the System
Before you shut down the operating system, decide
if you want it to reboot automatically or if you want to enter console-mode
commands after the shutdown completes.
You can perform the following three types of shutdown
operations:
An orderly shutdown with
SYS$SYSTEM:SHUTDOWN.COM (see Section A.3.2.1 )
An emergency shutdown
with OPCCRASH.EXE (see Section A.3.2.2 )
An emergency shutdown
with crash commands (see Section A.3.2.3 )
If you want the system to reboot automatically
after the shutdown, see Section A.2.1.
A.3.2.1 Orderly Shutdown
The SHUTDOWN.COM procedure shuts down the system while
performing maintenance functions such as disabling future logins,
stopping the batch and printer queues, dismounting volumes, and stopping
user processes. To use the SHUTDOWN.COM command procedure, log in
to the SYSTEM account, enter the following command, and press Enter:
$ @SYS$SYSTEM:SHUTDOWN
For more information about the SHUTDOWN.COM command
procedure, see the HP OpenVMS System Manager's Manual,
Volume 1: Essentials.
A.3.2.2 Emergency Shutdown with OPCCRASH.EXE
If you cannot perform an orderly shutdown with
the SHUTDOWN.COM procedure, run the OPCCRASH.EXE emergency
shutdown program. To run the OPCCRASH.EXE program, log in to the
SYSTEM account, enter the following command, and press Enter:
$ RUN SYS$SYSTEM:OPCCRASH
For more information about the OPCCRASH program,
see the HP OpenVMS System Manager's Manual, Volume 1: Essentials.
A.3.2.3 Emergency Shutdown with Crash Commands
Use crash commands only if the system “hangs”
(stops responding to any commands) and you cannot log in to the SYSTEM
account to use the SHUTDOWN.COM procedure or the OPCCRASH.EXE program.
NOTE: The method described here works on all Alpha computers.
However, on certain systems, you can force your processor to fail
(crash) by entering a specific console command. See the hardware
manuals that came with your computer for that information.
To force your processor to fail, do the following:
Halt
the system by pressing either Ctrl/P or Halt. (See Section A.3.1 for more information about how to halt
your Alpha computer.)
To
examine processor registers, enter the following commands and press Enter:
>>> E -N F R0>>> E PS
The system displays the contents of the registers.
Write down these values if you want to save information about the
state of the system.
Enter
the following commands and press Enter:
>>> D PC FFFFFFFF00000000>>> D PS 1F00
By depositing these values, you cause the system
to write a memory dump to the system dump file on the disk.
Enter
the following command and press Enter:
>>> CONTINUE
This causes the system to perform a bugcheck.
After
the system reboots, log in to the SYSTEM account.
To
examine the dump file, enter the following commands and press Enter after each one:
$ ANALYZE/CRASH SYS$SYSTEM:SYSDUMP.DMPSDA> SHOW CRASH
For more information
about the System Dump Analyzer (SDA) utility, see the HP
OpenVMS System Analysis Tools Manual.
