d-i partman-auto/expert_recipe string                         \
   boot-root-crypto ::                                            \
      90 140 200 ext3                                  \
         $primary{ } $bootable{ }                \
         method{ format } format{ }              \
         use_filesystem{ } filesystem{ ext3 }    \
         mountpoint{ /boot }                     \
      .                                               \
      1500 2500 3000 ext3                       \
         $primary{ }             \
         method{ format } format{ }              \
         use_filesystem{ } filesystem{ ext3 }    \
         mountpoint{ / }                         \
      .                                               \
      1500 10000 100000000 ext3                       \
         $primary{ }          \
         method{ keep }               \