9 Converting an Ext File System to a Btrfs File System

You can use the btrfs-convert utility to convert an ext file system to a Btrfs file system. The utility preserves an image of the original file system in a snapshot named extN_saved, such as ext4_saved. With this snapshot, you can roll back the conversion, even if you have changed the btrfs file system.

Note that you can't convert a root file system or a bootable partition, such as /boot, to Btrfs.

Note:

The conversion to Btrfs isn't supported on the Arm (aarch64) platform. If you're running Oracle Linux on the aarch64 platform, you can migrate data from one file system to another file system.