Hi, i have 2 identical servers both with ubuntu and Xen to host virtual servers on.. and on the both dom0 i have drbd, nfs and heartbeat to get files replicated between them both.. And now to the problem Both the servers stops working sometimes and refuse to do anything, but i can still ping them both. but can't access any port like http, ssh, ftp. and i have checked syslog and kernel log but can not se anything that tells me that something went wrong. The both servers is have now the same problem and i can't write anything from the logs. Next weekend im gona go to the place where they are hosted (450 km from here). and it would be helpfull if i could get any hints about what the problem could be. i have a gut feeling that this has something about drbd/nfs to do becaus one time when i was moving 30-40 gb to it both died in the same way. Any tips are welcome.