Simple question, my first few attempts to use ZFS failed, and I'm still looking for errors. A simple question is do I select grub2 in Calamares to boot into a ZFS root dataset, or is there some other systemd option available specifically for ZFS?

FWIW I found the end of the installation.log

    Starting job "grub" ( 38 / 40 ) 
    .. Running QList("grub-install", "/dev/vda") 
    .. Target cmd: QList("grub-install", "/dev/vda") Exit code: 1 output:
 Installing for i386-pc platform.
grub-install: error: unknown filesystem.
14:03:57 [1]: virtual Calamares::JobResult Calamares::Python::Job::exec()
    ERROR: Error while running: CalledProcessError: Command 'grub-install /dev/vda' returned non-zero exit status 1.

At:
  <string>(6): <module>
  /usr/lib/calamares/modules/grub/main.py(46): install_grub
  /usr/lib/calamares/modules/grub/main.py(63): run
 
14:03:57 [6]: virtual void Calamares::JobThread::run()
    Skipping non-emergency job "gummi_entries" 
    ..  Skipping non-emergency job "umount" 
14:03:57 [1]: void Calamares::ViewManager::onInstallationFailed(const QString&, const QString&)
    ERROR: Installation failed: "Bad main script file" 
    .. - message: "Bad main script file" 
    .. - details: Main script file /usr/lib/calamares/modules/grub/main.py for python job grub raised an exception.
14:03:57 [6]: void Calamares::ViewManager::onInstallationFailed(const QString&, const QString&)
    Calamares will quit when the dialog closes. 
14:03:57 [6]: DEBUG (Qt): Slideshow) deactivated
14:03:57 [6]: void Config::doNotify(bool, bool)
    Notification not sent; completion: failed 
14:06:02 [6]: void Config::doRestart(bool)
    mode= "never"  user wants restart? false force restart? false 
Shutting down Calamares... 
Finished shutdown. 

    KaOS is 64bit only operating system, you cannot install it on 32bit system.

    I see no signs of this being a 32bit system (besides, ISO can't boot on 32bit), but if this is a legacy BIOS system (thus not UEFI), then ZFS is not an option to use.

    markc Installing for i386-pc platform.

    It's a sign of 32bit system