ext4
Reserved blocks
Check
df -h /dev/sda1
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 117G 95G 16G 86% /
tune2fs -l /dev/sda1 | grep -i reserved
Reserved block count: 1546636
Reserved GDT blocks: 1016
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
Change
tune2fs -m 1 /dev/sda1
Setting reserved blocks percentage to 1% (309327 blocks)
Check result
tune2fs -l /dev/sda1 | grep -i reserved
Reserved block count: 309327
Reserved GDT blocks: 1016
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 117G 95G 21G 83% /