SPUCONTROL

Generated from C.60.01 /SYS/PUB/CICAT last modified on Thu Jan 11 09:18:52 2001

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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)


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