Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/sda1       55619640 51087312   1683972  97% /
none                   4        0         4   0% /sys/fs/cgroup
udev             4038076        4   4038072   1% /dev
tmpfs             817228     1348    815880   1% /run
none                5120        4      5116   1% /run/lock
none             4086120    17404   4068716   1% /run/shm
none              102400       60    102340   1% /run/user
/dev/sda4       40881208 23916736  14864968  62% /mnt/data