CentOS 7 now uses the XFS file system as the default file system instead of the ext4 file system. If you intend to migrate the system to another machine or create a new file system, you can consider using XFS instead of ext4. Users who use a Kickstart installation can consider modifying the Kickstart configuration to use XFS.

Additionally, information about the partitions and mounts configuration has been saved in the /root/preupgrade/kickstart/ directory. This information can be useful to users who choose to perform a system migration or convert their file systems to XFS.