Comment 18 for bug 1558747

This has been shown to not be a problem with MAAS and rather a problem with the host firmware (petitboot). While we wait for this to be fix released, there is a workaround that can be followed:

1) Boot order set to "Any Disk Device"
2) Create a curtin_userdata_ubuntu_ppc64el curtin preseed in /etc/maas/preseeds on your MAAS region controller for the system which will add the lines below to the late commands. A preseed file will need to be created for each release and it can be customized per system by adding system name.
  ipmi_01_install_ipmitool: ['apt-get', '-y', 'install', 'ipmitool']
  ipmi_02_modprob_devintf: ['modprobe', 'ipmi_devintf']
  ipmi_03_ipmitool_bootdev_none: ['ipmitool', 'chassis', 'bootdev', 'none']

This will allow you to deploy with MAAS.