Super-user reserved blocks

16-Jan-2012 | linux

$ sudo mkfs.ext4 -m 0 /dev/sdc1

-m reserved-blocks-percentage

Specify the percentage of the filesystem blocks reserved for the super-user. This avoids fragmentation, and allows root-owned daemons, such as syslogd(8), to continue to function correctly after non-privileged processes are prevented from writing to the filesystem. The default percentage is 5%.