7 Installing a System With a Btrfs root File System
Oracle Linux uses XFS as the default file system, but it also supports other file systems such as ext2, ext4, and so on.
The Btrfs file system is supported in Oracle Linux, but only on UEK. Thus, to install Oracle Linux with Btrfs, you must use the UEK ISO image.
For more information about file systems in Oracle Linux, see Oracle Linux 9: Managing Local File Systems.
Like any installation of a standard Oracle Linux release, installing the OS with a Btrfs file system can also be completed in two modes:
You can also install a system with a Btrfs root file system using Kickstart automation as described in Automating the Installation by Using Kickstart. If you choose to perform an automated installation and you create your own network installation setup, as described in Creating a Network Installation Setup, ensure that you configure the network boot to use the installation kernel and ram-disk image provided on the UEK ISO image and that you have mirrored all required repositories, or you might get an error stating that Btrfs isn't supported for the partitioning type.