Every once in a while, the EXSi 4.0.0 build 208167 server stops processing network traffic and has to be manually power cycled. When it comes back up, it does a file-system check that takes over an hour. We have been researching this issue and see that others report it. We don't know what we can tweak in the setup to stop this behavior. We'll appreciate any help we can get regarding this issue.