e4defrag

Defragment an ext4 filesystem. More information: https://manned.org/e4defrag.

Defragment the filesystem:

e4defrag {{/dev/sdXN}}

See how fragmented a filesystem is:

e4defrag -c {{/dev/sdXN}}

Print errors and the fragmentation count before and after each file:

e4defrag -v {{/dev/sdXN}}