Question about FSHammer getting full

[Sdävtaker]

Hi,
I got  a hammer FS running 59 days (today was 60, recopy is scheduled every
30, maybe a coincidence, maybe not)
The thing is the Hd got full today, i destroyed some old PFSs to make some
space (6GBS) and 5 minutes after it was full again, im guessing something is
filling it real fast, but dont know where to look at :-/
It does mirror copy  from other mahcines every 30 minutes, but stopped that
before remove the 6GB.
Any ideas, suggestions?
If i found it, and i stop it, is there a way to remove the full story from
all snapshots of those specific files consuming all?
Thanks for any ideas.
Damian