I tried this DAG failover between datacenters few weeks ago and it worked just fine (2 servers in main DC and 1 in DR). However when I tried it last time I got the following error:
[2011-09-16T01:02:39] WriteError! Exception = Microsoft.Exchange.Cluster.Replay.DagTaskQuorumNotAchievedException: Unable to form quorum for database availability group 'DAG-01'. Please try the operation again, or run the Restore-DatabaseAvailabilityGroup
cmdlet and specify the site with servers known to be running.
restore-databaseavailabilitygroup explicitly called CloseTempLogFile().
I tried rebooting the servers but no go. Why would it be unable to form the quorum, or is this message indicative of something else? I could not find anything by doing online searches on this error.
