how to disable boot time mount of encrypted volumes in f12?

[Farkas Levente]

hi,
i've got an LUKS encrypted volume (lvm partition), which i used to
mount manually (until now), but now fedora 12 try to mount it during
boot and don't go further ie. waitong for the partition password. the
partition is NOT in fstab or any other files in /etc/. so how can i
disable the boot time mount of this partition? this is very annoying
and make my computer unusable:-(
thanks in advance.
regards.

-- 
  Levente                               "Si vis pacem para bellum!"