Hi Bjorn, thanks for trying that, it looks unlikely our problems are related then, it would have been nice if it were that simple :) Just on a side note I do remember those WD reds did have some issue regarding load cycles but I think they were older batches, I seem to remember reading a good thread on it over at the synology Western Digital Discussion Room http://forum.synology.com/enu/viewforum.php?f=178 Good luck with your bug hunting and thanks.