4
Specify additional le system options if your setup requires them. This is necessary,
for example, if you need persistent device names. For details on the available options,
refer to Section 3.1.3, “Editing a Partition” (page 78).
5
Click Finish to apply your partitioning setup and leave the partitioning module.
If you created the partition during installation, you are returned to the installation
overview screen.
3.1.2.1 Btrfs Partitioning
If you want to use Btrfs and Storage Administration Guide, chapter Overview of File
Systems in Linux for more information on Btrfs) as your default lesystem for a newly
installed system, click Partitioning on the Installation Settings screen, and check Use
Btrfs as Default Filesystem. The installation system then suggests creating the /boot
partition formatted with Ext3 lesystem, and the root / partition formatted with Btrfs
holding a default set of subvolumes, which you can modify with the Expert Partitioner
tool later.
The root lesystem is the default subvolume and it is not listed in the list of created
subvolumes. As a default Btrfs subvolume, it can be mounted as a normal lesystem.
It is possible to create snapshots of Btrfs subvolumes - either manually, or automatically
based on system events. For example when making changes to the lesystem, zypper
invokes the snapper command to create snapshots before and after the change. This
is useful if you are not satised with the change zypper made and want to restore the
previous state. As snapper invoked by zypper snapshots the root lesystem by
default, it is reasonable to exclude specic directories from being snapshot, depending
on the nature of data they hold. And that is why YaST suggests creating the following
separate subvolumes.
Suggested Btrfs Subvolumes
/tmp /var/tmp /var/run
Directories with frequently changed content.
/var/spool
Contains user data, such as mails.
76 Reference
