drive suddenly full...quota

hi
from out of nowhere it seems my drives are full while there is only 12 GB of files on them. I have 3x 36 GB drives in a raid 5 config.
This leads to not being able to upload anything and not starting any application. mysql and postgresql for instance.
I cannot find anything strange in the logs.
Webmins quotas module says root is over its limit (58GB) but only 12GB used.

I was working on a joomla website when i was kicked out and this trouble started from out of the blue.

The only thing I can think of is one of the drives may have stopped working or has this nothing to do with it? (the server is running since 2 weeks)
here is a log file from a reboot
http://izihost.org/log.txt

any ideas would be greatly appreciated.
thank you

Status: 
Closed (fixed)