Filesystem      1K-blocks       Used Available Use% Mounted on
/dev/sda5        21744852   17523076   3094148  85% /
none                    4          0         4   0% /sys/fs/cgroup
udev              2011316          4   2011312   1% /dev
tmpfs              404760       1152    403608   1% /run
none                 5120          0      5120   0% /run/lock
none              2023792         72   2023720   1% /run/shm
none               102400         16    102384   1% /run/user
/dev/md0       1922600632 1740496996  84418088  96% /mnt/big