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 HP-UX Virtual Partitions Administrator’s Guide > Chapter 2 How vPars and Its Components Work

EFI and Integrity Notes
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  • EFI Shell Accessibility  After the vPars Monitor (/stand/vpmon) is booted, the EFI shell will not be accessible. This includes using hpux.efi and other EFI commands.

    If you need to perform any EFI functions, you will need to shut down all the virtual partitions and reboot the nPartition to access the EFI shell.

  • New vPars Commands  The vPars commands introduced in vPars A.04.01 for use on only Integrity systems are vparenv, vparconfig, and vparefiutil:

    vparenv

    HP-UX shell command that allows you to set the mode (vPars or nPars) for the next reboot of the nPartition or to set the memory granularity unit size in firmware.

    vparconfig

    EFI command that allows you to set the mode (vPars or nPars) and forces a reboot of the nPartition.

    Note that vparconfig is not a built-in EFI command; you will need to go to the fsN:\> disk prompt to execute this command.

    vparconfig is installed in the EFI partition of the root disk when vPars is installed. Specifically, the file is vparconfig.efi and is installed in \efi\hpux.

    vparefiutil

    HP-UX shell command to display or manage the HP-UX hardware path to EFI path mappings of bootable disks within the vPars database.

    When booting the vPars Monitor from EFI (boot /stand/vpmon), the backspace key sometimes is not parsed correctly; if the command fails, try again without backspacing.

    For more information on:

  • CPUs and Deconfiguration  If a CPU is marked for deconfiguration using an EFI command and the nPartition is not rebooted (for example, the vPars Monitor is immediately booted), the vPars Monitor will not know or indicate (including with vparstatus) that the CPU has been marked for deconfiguration and will use the CPU like any other working CPU.

  • EFI Variables and Switching Modes  

    NOTE: The following EFI settings behavior does not occur when using vPars A.05.01 or later, vPars A.04.04 or later, and the system firmware required for those vPars releases. See the HP-UX Virtual Partitions Ordering and Configuration Guide for minimum firmware version details.

    The default EFI settings in nPars mode will be inherited when switched to vPars mode. However, when switching back to nPars mode, any EFI settings will be reset to the nPartition defaults, unless otherwise noted (for example, memory granularity). This includes the primary and alternate paths (HAA (High-Availability Alternate) is not supported). Even if you use parmodify to change the paths, parstatus will show them as set; however, once the system is booted into nPars mode, those changes by parmodify are not retained. For more information on switching modes, see the manpage vparenv(1M).

    Also, while running in vPars mode, the EFI device path of a boot device, specifically the vPars Monitor boot device, can be changed when the boot device is reformatted due to an installation (either cold or Ignite-UX). The associated EFI boot path is updated to use the new EFI device path. However, firmware-saved EFI boot path options are not updated. If the nPartition or vPars Monitor is rebooted, the new EFI boot path options are discarded and replaced with the previously saved EFI boot path options, which contain now stale EFI device paths.

    The EFI boot options can be updated manually by performing the following:

    1. Switch to nPars mode via the vparenv or vparconfig command.

    2. Reboot the nPartition to the EFI Boot Manager.

    3. Select Boot Option Maintenance Menu.

    4. Select Delete Boot Option(s).

    5. Select HP-UX Primary Boot and then exit.

    6. Select Exit to return to the EFI Boot Manager.

    7. Select EFI Shell [Built-in].

    8. Launch HP-UX from the EFI shell prompt:

      Shell> fsN:

      fsN:\> efi\hpux\hpux boot vmunix

    9. Use the setboot command to set up the primary boot path with the desired boot device. This also sets the HP-UX Primary Boot boot option with the latest EFI device path.

    10. Use the vparenv command to switch to vPars mode.

    11. Reboot the nPartition.

  • EFI Command default clear  Whenever you use the default clear command at the EFI shell, this erases vPars information that is stored in NVRAM and the vPars monitor may not boot. To boot the vPars Monitor, you should perform the following:

    1. Change the mode to nPars and allow the system to reboot to the EFI shell:

      Shell> fsN: fsN:\> efi\hpux\vparconfig reboot nPars

    2. At the EFI prompt, boot the HP-UX kernel in standalone mode:

      Shell> fsN: fsN:\> efi\hpux\hpux /stand/vmunix

      The booting of the kernel will restore the vPars information in NVRAM. Now you can return to vPars mode and reboot the vPars Monitor.

    3. To change the mode to vPars and reboot the vPars Monitor:

      # vparenv -m vPars # shutdown -r ...
      Shell> fs0: fs0:\> \efi\hpux\hpux vpmon


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