On Nov 3, 2014, at 7:53 AM, Götz Reinicke - IT Koordinator 
<goetz.reini...@filmakademie.de> wrote:

> Hi,
> 
> in one server I do have a SSD raid 1 size 219GB.
> 
> df shows 9.4 GB free, 198GB used.
> 
> If I do "du -sch * | sort -h -r" on /, I just have close to 3.5GB used ....
> 
> Any hints, what's eating up the space?
> 
> Centos 6.6, fs = ext4.
> 
>       regards . Götz

The ext[234] filesystems reserve a certain amount of space for use by root 
only.  If I remember correctly, the default if 5%, but you can tune that with 
tune2fs(8) or mkfs.ext4(8). The df command subtracts the reserved space when it 
shows the amount free.  So an empty 1GB filesystem would show as having 950 MB 
free.

Hope that helps…

Rick
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