omfg…
Guys, I think gparted on my ubunu install is somehow messed up…
I always used it to format my hdds.
And one time I thought: “Man, this formating is going really fast, it used to take more time a while ago…” 
Funny thing again: Encountered no error message from gparted or anything suggestion sth. is wrong.
Well now as a desperate try, I booted ubuntu from live usbstick, created new part.table, formated hdd in ext4 and copied stuff from the other hdd.
Now hdd gets recognized by my vero and so far everything is is working…can’t believe it…