d-i partman-auto/expert_recipe string \
        root-boot :: \
                9000 10000 10000 ext3 \ 
                        $primary{ } \
                        $bootable{ } \
                        method{ format } \
                        format{ } \
                        use_filesystem{ } 
                        filesystem{ ext3 } \
                        mountpoint{ / } \
                . \
                10000 50 100000000 ext3 \
                        method{ format } format{ } \
                        use_filesystem{ } filesystem{ ext3 } \
                        mountpoint{ /var } \
                . \
                1000 512 2000 linux-swap \
                method{ swap } format{ } \
                .