Filesystem Size Used Avail Capacity Mounted on
/dev/ada0p2 1G 624M 302M 67% /
devfs 1.0k 1.0k 0B 100% /dev
/dev/ada0p4 503M 20k 463M 0% /tmp
/dev/ada0p5 9.9G 1.7G 7.3G 19% /var
/dev/ada0p6 903G 903G -71G 109% /usr
devfs 1.0k 1.0k 0B 100% /var/named/dev
Linux – Why does df show negative available space
disk-usagefilesystemslinux
Best Answer
From your output, the disk
/var/dev/ada0p6
seems to be so full that you are now using "reserved space". Usually, 8-10% of disk space are "reserved" (i.e. onlyroot
processes can allocate space once disk usage exceeds 90%). Once this happens, free space is reported as a negative number.