Ubuntu preseed 单硬盘（sda）GPT（>2TB）配置示例：

注： 1、6行gpt参数设置 2、要有1个1M大小的biosgrub分区

d-i grub-installer/bootdev string /dev/sdb （可通过该命令指定grub安装硬盘，默认为/dev/sda，一般不建议改）

cat ubt14043_gpt.seed

d-i live-installer/net-image string http://10.0.0.2/cobbler/links/ubuntuserver14043-x86_64/install/filesystem.squashfs 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 d-i netcfg/choose_interface select auto d-i clock-setup/utc boolean true d-i partman-basicfilesystems/choose_label string gpt d-i partman-basicfilesystems/default_label string gpt d-i partman-partitioning/choose_label string gpt d-i partman-partitioning/default_label string gpt d-i partman/choose_label string gpt d-i partman/default_label string gpt d-i partman-auto/disk string /dev/sda d-i partman-auto/method string regular d-i partman-auto/expert_recipe select
boot-root ::
1 1 1 free
$bios_boot{ }
method{ biosgrub }
. \

100000 80 100000 ext4  \
   $bootable{ } \
   method{ format } format{ } \
   use_filesystem{ }  filesystem{ ext4 } \
   mountpoint{ / }   \
   .              \
   102 60 1000 linux-swap  \
   method{ swap } format{ } \
   .              \
   1000000 100% 10000000 ext4  \
   method{ format } format{ } \
   use_filesystem{ }  filesystem{ ext4 } \
   mountpoint{ /home }   \
   .

d-i partman/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/default_filesystem string ext4 d-i clock-setup/utc boolean true d-i clock-setup/ntp boolean true d-i clock-setup/ntp-server string 10.0.0.3 d-i base-installer/kernel/image string linux-server d-i passwd/root-login boolean false d-i passwd/make-user boolean true d-i passwd/user-fullname string super d-i passwd/username string super d-i passwd/user-password password xxxxx d-i passwd/user-password-again password xxxxx d-i user-setup/allow-password-weak boolean true d-i user-setup/encrypt-home boolean false d-i passwd/user-default-groups string sudo d-i mirror/country string manual d-i mirror/protocol string http d-i mirror/http/hostname string 10.0.0.2 d-i mirror/http/directory string /cobbler/ks_mirror/ubuntuserver14043-x86_64 d-i apt-setup/services-select multiselect security d-i apt-setup/security_host string 10.0.0.2 d-i apt-setup/security_path string /cobbler/ks_mirror/ubuntuserver14043-x86_64 d-i debian-installer/allow_unauthenticated string false d-i pkgsel/upgrade select none d-i pkgsel/language-packs multiselect d-i pkgsel/update-policy select none d-i pkgsel/updatedb boolean true d-i grub-installer/skip boolean false d-i lilo-installer/skip boolean false d-i grub-installer/only_debian boolean true d-i grub-installer/with_other_os boolean true d-i finish-install/keep-consoles boolean false d-i finish-install/reboot_in_progress note d-i cdrom-detect/eject boolean true d-i debian-installer/exit/halt boolean false d-i debian-installer/exit/poweroff boolean false d-i pkgsel/include string openssh-server