We've a HV cluster based on Windows 2012 R2 consisting of 4 nodes connected via FC to common storage (NetApp). From couple of months we are getting strange behavior. When we put a node into to the pause al machines are moved from this node correctly. Then we are making any maintenance like OS update etc. Then we restarting this paused node - after it get back to live we are unpause it. And then strange things happens - all the vms are returning back to the node but all of them resets dirty :(. We were checking all of the logs and have no clue what can be wrong with our configuration. During unpause the communication with the cluster is ok also the storage is available. Maybe some of You have any clue or suggestion ?