system toolbox » ubuntu

hernad@nmraka-1:~$ df -H

Filesystem             Size   Used  Avail Use% Mounted on
/dev/mapper/mraka3vg1-root_2
                        11G   9,3G   748M  93% /
varrun                 1,5G   132k   1,5G   1% /var/run
varlock                1,5G      0   1,5G   0% /var/lock
procbususb             1,5G    95k   1,5G   1% /proc/bus/usb
udev                   1,5G    95k   1,5G   1% /dev
devshm                 1,5G   508k   1,5G   1% /dev/shm
lrm                    1,5G    45M   1,5G   4% /lib/modules/2.6.24-19-generic/volatile
/dev/mapper/mraka3vg1-data
                        64G    58G   2,7G  96% /data    <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
/dev/sda3              996M    81M   865M   9% /boot_1
gvfs-fuse-daemon        11G   9,3G   748M  93% /data/home/hernad/.gvfs
/dev/sdb1               41G    24G    17G  59% /media/data_usb
archive:/data/downloads
                       1,1T      0   1,1T   0% /data/home/hernad/archive

http://www.linuxquestions.org/questions/bsd-17/df-h-prints-wrong-hdd-size-640771/

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the filesystem reserves 8% of the disc for various duties, although you can go into that 8% its unwise to let your drives get that full