--- features: - | The PowerVM virt driver now supports booting from local ephemeral disk. Two new configuration options have been introduced to the ``powervm`` configuration group, ``disk_driver`` and ``volume_group_name``. The former allows the selection of either ssp or localdisk for the PowerVM disk driver. The latter specifies the name of the volume group when using the localdisk disk driver. upgrade: - | The PowerVM virt driver previously used the PowerVM Shared Storage Pool disk driver by default. The default disk driver for PowerVM is now localdisk. See configuration option ``[powervm]/disk_driver`` for usage details.