I am trying to modify and existing preseed file that a predecessor created to allow the drive configuration utility to be used to create a raid volume for the root directory. Either that or i need to modify the preseed to create a software raid 6 across 8 drives (/dev/nvme0n1 - /dev nvme7n1)
This is for Ubuntu 20.04 server
Here is the current partman entries in the preseed file
d-i partman-basicfilesystems/no_swap boolean false
#
# Keep that one set to true so we end up with a UEFI enabled
# system. If set to false, /var/lib/partman/uefi_ignore will be touched
d-i partman-efi/non_efi_system boolean true
#
d-i partman/choose_label string gpt
d-i partman/default_label string gpt
d-i partman-partitioning/choose_label string gpt
d-i partman-partitioning/default_label string gpt
#
# Added for uefi partitioning
#d-i partman-auto/choose_recipe select atomic
d-i partman-auto/choose_recipe select boot-root-all
d-i partman-auto/expert_recipe string \
boot-root-all :: \
512 512 512 free \
$iflabel{ gpt } \
$reusemethod{ } \
method{ efi } \
format{ } \
. \
512 512 512 ext4 \
$defaultignore{ } \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ /boot } \
. \
1024 4096 10000000 ext4 \
$lvmok{ } \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ / } \
.
#d-i partman/default_filesystem string ext4
d-i partman/confirm_nooverwrite boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman/confirm_write_new_label boolean true
d-i partman-md/confirm boolean true
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
