SPUCONTROL



SPUCONTROL

      Initiates, starts, and stops the SPU Switchover/XL environment,
      displays status information, and displays the system name.
      SPU Switchover/XL is not a part of the 900 Series HP 3000
      Computer System Fundamental Operating Software and must be
      purchased separately.

SYNTAX


SETUP
SHOWSPU
SPUCONTROL [ACTION=]START
STATUS
STOP

PARAMETERS


SETUP Initializes the SPU Switchover/XL environment that
you created using the SYSGEN utility SPU commands.
This parameter eliminates rebooting the system to
activate configuration changes.

Usage requirements of this parameter are as follows:

o You can enter SPUCONTROL SETUP only on the system
where you performed the configuration.

o If you change the configuration, you must enter
SPUCONTROL SETUP before entering SPUCONTROL START.

Using this parameter automatically sends a copy of
the new configuration file from the system where the
configuration is being performed to the other system,
enabling synchronization across system pairs.

If you mounted volume sets on the current system only
for configuration purposes, this parameter returns the
volume sets to their home system. However, in order
for this action to occur, you must first close all
switchable volume sets that this parameter should
return to their home system.

NOTE

     The SPUCONTROL SETUP command pushes all closed volume sets from
the system where the configuration changes were made, to the
other system, if that system was designated as the home system.
The SPUCONTROL SETUP command does not pull volume sets from the
other system to the system where the configuration changes were made.

SHOWSPU Displays the name of this system as defined in the
SPU Switchover/XL configuration file.

START Establishes a system status message between the system
pairs that enables each system to determine if its
partner is operative. SPUCONTROL START is a
prerequisite for the SWITCHOVER command. If both
systems are running, you can enter SPUCONTROL START
from either the home or the alternate system. Entering
the command once from either system affects both systems.

You can also enter SPUCONTROL START when one of the
system pairs is inoperative. In this case, SPU
Switchover/XL does not initiate a system status
message and checks only the operative system's SPU
configuration file.

STATUS Displays the SPU Switchover/XL status for this system
and its partner system.

STOP Terminates the system status message between the system
the system pairs previously initiated with the SPUCONTROL
START command. You can enter SPUCONTROL STOP from either
the home or the alternate system to stop the system
status message for the system pair.

Note that you must enter SPUCONTROL STOP before you
can reconfigure the SPU Switchover/XL environment.

OPERATION

      The function of the SPUCONTROL START command does not remain
      after rebooting one of the system pairs.  The default state of
      a system after rebooting is the same as entering the SPUCONTROL
      STOP command.

NOTE


To automatically initialize the SPU Switchover/XL environment
after rebooting a system, you should include the SPUCONTROL
START command in the SYSSTART file.

After reconfiguring the SPU Switchover/XL environment, you
must enter the SPUCONTROL SETUP command before entering the
SPUCONTROL START command. Similarly, you must enter the
SPUCONTROL START command before entering the SWITCHOVER command.

You can enter this command only from the system console and
must have OP or SM capability.

EXAMPLE(S)

      The following examples show system responses for each parameter
      when you enter the SPUCONTROL command:

SETUP         A display similar to the following appears if you
              enter SPUCONTROL SETUP:

                 #S3/38 SPUCONTROL SETUP IS STARTING.
                 HH:MM/ldev#/SPUCONTROL SETUP COMPLETE.

SHOWSPU       A display similar to the following appears if you
              enter SPUCONTROL SHOWSPU on Alpha:

                 THE SPU SWITCHOVER SYSTEM NAME IS ALPHA.

START         A display similar to the following appears if you
              enter SPUCONTROL START:

                 SWITCHOVER ENVIRONMENT IS ESTABLISHED BETWEEN
                 homesystem AND altsystem.

STATUS        A display similar to the following appears when both
              the home and alternate systems are running:


              System   Volume Sets                   Home System
              ------   -----------                   -----------

              Alpha    a_production_data_set         Alpha
                       a_user_vol_set                Alpha
                       a_mirror_disk_set             Alpha

              Beta     b_test_software_set           Beta
                       b_benchmark_set               Beta

              A display similar to the following appears if you
              switch over from the home system (Alpha) to the
              alternate system (Beta):

              System   Volume Sets                   Home System
              ------   -----------                   -----------

              Beta     b_test_software_set           Beta
                       b_benchmark_set               Beta
                       a_production_data_set         Alpha
                       a_user_vol_set                Alpha
                       a_mirror_disk_set             Alpha

STOP          A display similar to the following appears if you
              enter SPUCONTROL START:

                 SWITCHOVER ENVIRONMENT IS TERMINATED BETWEEN
                 altsystem AND homesystem.

Commands:  SYSGEN, SWITCHBACK, SWITCHOVER


Manuals :  SPU Switchover/XL User's Guide (36378-90001)

           System Startup, Configuration, and Shutdown Reference
           Manual (32650-90042)