SYSTEMD-GPT-AUTO-GENERATOR(8) systemd-gpt-auto-generator SYSTEMD-GPT-AUTO-GENERATOR(8)
NAME
systemd-gpt-auto-generator - Generator for automatically discovering and mounting root, /home and /srv
partitions, as well as discovering and enabling swap partitions, based on GPT partition type GUIDs.
SYNOPSIS
/usr/lib/systemd/system-generators/systemd-gpt-auto-generator
DESCRIPTION
systemd-gpt-auto-generator is a unit generator that automatically discovers root, /home, /srv and swap
partitions and creates mount and swap units for them, based on the partition type GUIDs of GUID partition
tables (GPT). It implements the Discoverable Partitions Specification[1]. Note that this generator has no
effect on non-GPT systems, on systems where the units are explicitly configured (for example, listed in
fstab(5)), or where the mount points are non-empty.
This generator will only look for root partitions on the same physical disk the EFI System Partition (ESP) is
located on. It will only look for the other partitions on the same physical disk the root file system is
located on. These partitions will not be searched on systems where the root file system is distributed on
multiple disks, for example via btrfs RAID.
systemd-gpt-auto-generator is useful for centralizing file system configuration in the partition table and
making manual configuration in /etc/fstab or suchlike unnecessary.
This generator looks for the partitions based on their partition type GUID. The following partition type GUIDs
are identified:
Table 1. Partition Type GUIDs
┌─────────────────────────────────────┬─────────────────────────────┬──────────────────────────────┐
│Partition Type GUID │ Name │ Explanation │
├─────────────────────────────────────┼─────────────────────────────┼──────────────────────────────┤
│44479540-f297-41b2-9af7-d131d5f0458a │ Root Partition (x86) │ On 32-bit x86 systems, the │
│ │ │ first x86 root partition on │
│ │ │ the disk the EFI ESP is │
│ │ │ located on is mounted to the │
│ │ │ root directory /. │
├─────────────────────────────────────┼─────────────────────────────┼──────────────────────────────┤
│4f68bce3-e8cd-4db1-96e7-fbcaf984b709 │ Root Partition (x86-64) │ On 64-bit x86 systems, the │
│ │ │ first x86-64 root partition │
│ │ │ on the disk the EFI ESP is │
│ │ │ located on is mounted to the │
│ │ │ root directory /. │
├─────────────────────────────────────┼─────────────────────────────┼──────────────────────────────┤
│69dad710-2ce4-4e3c-b16c-21a1d49abed3 │ Root Partition (32-bit ARM) │ On 32-bit ARM systems, the │
│ │ │ first ARM root partition on │
│ │ │ the disk the EFI ESP is │
│ │ │ located on is mounted to the │
│ │ │ root directory /. │
├─────────────────────────────────────┼─────────────────────────────┼──────────────────────────────┤
│b921b045-1df0-41c3-af44-4c6f280d3fae │ Root Partition (64-bit ARM) │ On 64-bit ARM systems, the │
│ │ │ first ARM root partition on │
│ │ │ the disk the EFI ESP is │
│ │ │ located on is mounted to the │
│ │ │ root directory /. │
├─────────────────────────────────────┼─────────────────────────────┼──────────────────────────────┤
│933ac7e1-2eb4-4f13-b844-0e14e2aef915 │ Home Partition │ The first home partition on │
│ │ │ the disk the root partition │
│ │ │ is located on is mounted to │
The /home and /srv partitions may be encrypted in LUKS format. In this case a device mapper device is set up
under the names /dev/mapper/home and /dev/mapper/srv. Note that this might create conflicts if the same
partition is listed in /etc/crypttab with a different device mapper device name.
Also note that systemd-efi-boot-generator(8) will mount the EFI System Partition (ESP) to /boot if not
otherwise mounted.
When using this generator in conjunction with btrfs file systems, make sure to set the correct default
subvolumes on them, using btrfs subvolume set-default.
systemd-gpt-auto-generator implements systemd.generator(7).
SEE ALSO
systemd(1), systemd.mount(5), systemd.swap(5), systemd-fstab-generator(8), systemd-efi-boot-generator(8),
[email protected](8), cryptsetup(8), fstab(5), btrfs(8)
NOTES
1. Discoverable Partitions Specification
http://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec/
systemd 219 SYSTEMD-GPT-AUTO-GENERATOR(8)
Back to main site | Back to man page index