1a - Remove mount point /mnt of /dev/sda (256.00 MiB) from /etc/fstab -> 1b
1b - Unmount /dev/sda (256.00 MiB) at /mnt -> 1c
1c - Delete ext4 on /dev/sda (256.00 MiB) -> 2a

2a - Create xfs on /dev/sda (256.00 MiB) -> 2b
2b - Mount /dev/sda (256.00 MiB) at /test2 -> 2c
2c - Add mount point /test2 of /dev/sda (256.00 MiB) to /etc/fstab ->
