anchor.diff:  d-i     partman-partitioning/confirm_write_new_label boolean true
   d-i     partman/choose_partition select Finish partitioning and write changes to disk
   d-i     partman/confirm boolean true
  +d-i     partman/confirm_nooverwrite boolean true
  +d-i     partman/unmount_active boolean true
   
   d-i     partman-lvm/device_remove_lvm boolean true
   d-i     partman-lvm/confirm boolean true
  
positive.code: 
  d-i     debian-installer/locale string en_US.UTF-8
  d-i     debian-installer/splash boolean false
  d-i     console-setup/ask_detect        boolean false
  d-i     console-setup/layoutcode        string us
  d-i     console-setup/variantcode       string
  
negative.code: d-i     netcfg/confirm_static   boolean true
  
  d-i     partman/early_command string \
  sleep 10 ; umount /media || /bin/true ;\
  udevadm trigger; udevadm settle --timeout=30 ;\
  for d in $(ls /dev/sd[a-z]); do \
  dd if=/dev/zero of=$d bs=4M count=16 || echo "Write to $d failed" ;\
  done
  d-i     partman-auto/disk string /dev/sda
  d-i     partman-auto/method string regular
  