Why is (free_space + used_space) != total_size in df? [migrated]
- by Timothy Jones
I have a ~2TB ext4 USB external disk which is about half full:
$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sdc 1922860848 927384456 897800668 51% /media/big
I'm wondering why the total size (1922860848) isn't the same as Used+Available (1825185124)? From this answer I see that 5% of the disk might…