Originally Posted by michaaa62

Might be an corrupted file system or the like.
To debug, look for the output of those commands. Look out for /home or /opt or /dev/mmcblk0p2. There will be permission issues in the last command, but the do not harm a bit, because only the biggest folders are nessary to look at.

Code:

mount
df
du -kx / | sort -n | tail -n 20

You need rootsh installed for the following command

Code:

sudo gainroot 
sfdisk -l

The last command prints out the partition table to look at.