I'm a little bit retarded and I updated SU and it ****ed up. While I was reflashing the rom, I forgot to wipe things and it turned out ok since it had no problem and downgraded SU. If there are more cases you can dirty flash, I don't know. But in that case it worked and I lost nothing
EDIT: I figured it out, the partition got dumped into the /data/lost+found/ folder, I was able to recover 41% before the task failed. So Now I'm individually copying parts I need from it. Very thankful though that they are there.