---
- disk:
    name: /dev/vda
    size: 500 GiB
- disk:
    name: /dev/vdb
    size: 500 GiB
- md:
    name: "/dev/md0"
    chunk_size: 16 KiB
    md_devices:
    - md_device:
        blk_device: /dev/vda
    - md_device:
        blk_device: /dev/vdb