On 04/18/2016 02:47 AM, Chandran Manikandan wrote: > For my system shows like below. > df -h > > Filesystem Size Used Avail Use% Mounted on > /dev/sda2 909G 576G 287G 67% / > tmpfs 3.9G 0 3.9G 0% /dev/shm > /dev/sda1 3.9G 160M 3.5G 5% /boot > /dev/sdb1 916G 382G 488G 44% /bkhdd Unmount /bkhdd temporarily, and then run "du -hs /*" again. One possibility is that you ran a backup while /dev/sdb1 was not mounted, and now you are consuming a bunch of space that you can't see because you've mounted another filesystem on top of it.