I can't find 8GB data in FreeBSD.  I use df -h and see this:/dev/da1s1a      19G     16G    1.4G    92%    /devfs            1.0k    1.0k      0B   100%    /devzzdata/jail      341G     22G    318G     7%    /jailssd/radius       183G     10G    173G     5%    /jail/mysql1/var/db/mysql/radiusssd              173G     31k    173G     0%    /ssdzzdata           355G     37G    318G    10%    /usr/localzzdata/ports     319G    906M    318G     0%    /usr/portszzdata/ports/distfiles    319G    457M    318G     0%    /usr/ports/distfileszzdata/src       318G    386M    318G     0%    /usr/src/bin             19G     16G    1.4G    92%    /jail/mysql1/bin/sbin            19G     16G    1.4G    92%    /jail/mysql1/sbin/lib             19G     16G    1.4G    92%    /jail/mysql1/lib/libexec         19G     16G    1.4G    92%    /jail/mysql1/libexec/usr/bin         19G     16G    1.4G    92%    /jail/mysql1/usr/bin/usr/sbin        19G     16G    1.4G    92%    /jail/mysql1/usr/sbin/usr/include     19G     16G    1.4G    92%    /jail/mysql1/usr/include/usr/lib         19G     16G    1.4G    92%    /jail/mysql1/usr/lib/usr/libdata     19G     16G    1.4G    92%    /jail/mysql1/usr/libdata/usr/libexec     19G     16G    1.4G    92%    /jail/mysql1/usr/libexec/usr/share       19G     16G    1.4G    92%    /jail/mysql1/usr/share/usr/ports       319G    906M    318G     0%    /jail/mysql1/usr/ports/usr/ports/distfiles   319G  457M  318G   0%    /jail/mysql1/usr/ports/distfilesdevfs            1.0k    1.0k      0B   100%    /jail/mysql1/devfdescfs          1.0k    1.0k      0B   100%    /dev/fdI try to check via du -Aclnx all files mounted to UFS filesystem and nonetheless I find 9525Mb files.  Any suggestion? My fstab:/dev/da1s1a / ufs rw 1 1/dev/da1s1b none swap sw 0 010.199.194.110:/storage/xfs_radius /mnt/nas nfs rw,tcp,noauto,noatime,async 0 0
Can't find 8GB data in FreeBSD
mount;freebsd;disk usage;ufs
If a process opens a file but the file is then deleted, the output of du will be different to df.You can use lsof in order to find processes open with files that are around the size you are missing.  When the process ends/closes the file, df and du should show the same space used.