Ubuntu Preseed Raid 1 with multiple partitions

[Camilo Vieira]

I intend to create the following RAID 1:

    Partition    Size         Filesystem
        /        20GB            ext4
        /boot    500MB            ext4
        swap    2GB            swap
       /backup    10GB            ext4
       /opt     all free size     ext4

I have triyng this configuration:

    d-i partman-md/device_remove_md    boolean true
    d-i partman-auto/method string raid
    d-i partman-auto/disk string /dev/sda /dev/sdb
    d-i partman-auto/expert_recipe string \
          multiraid ::                                         \
                  10000 5000 20000 raid                        \
                          $primary{ } method{ raid }           \
                  .                                            \
                  200 512 500 raid                             \
                          method{ raid }                       \
                  .                                            \
                  2000 512 4000 raid                           \
                          method{ raid }                       \
                  .                                            \
                  10000 512 15000 raid                         \
                          method{ raid }                       \
                  .                                            \
                  10000 10000 1000000000 raid                  \
                          method{ raid }                       \
                  .

    d-i partman-auto-raid/recipe string \
        1 2 0 ext4 /                    \
              /dev/sda1#/dev/sdb1       \
        .                               \
        1 2 0 ext4 /boot                \
              /dev/sda2#/dev/sdb2       \
        .                               \
        1 2 0 swap                      \
              /dev/sda3#/dev/sdb3       \
        .                               \
        1 2 0 ext4 /backup              \
              /dev/sda5#/dev/sdb5       \
        .                               \
        1 2 0 ext4 /opt                 \
              /dev/sda6#/dev/sdb6       \
        .


    d-i mdadm/boot_degraded boolean true
    d-i partman-md/confirm_nooverwrite 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
    d-i partman/confirm_nooverwrite boolean true

The setup displays a RAID configuration error and ask me to check the
syslog file.

Could you help me?

Thanks!
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