We currently backup VMs accross three different clusters using multiple VMware Data Recovery appliances. Without much warning, we've begun to have problems with one of the hosts. That host was recently upgraded from 5.0 to 5.1 - but we have good backups since that took place.
The backups kick off like normal and a snapshot is created, then it generates the 3946 error, removes the snapshot and goes on with it's life. There is only one host affected - multiple Data Recovery appliances are unable to backup VMs after having been able to back up from it for some time.
Any suggestions on where to look at this one? Nothing changed with disks - so no block size issue and I can't seem to find any DNS issues either. (That was my first hope so it would be an easy fix, but it just doesn't seem to be the case.)
Would appreciate anyones help on this...
Here is a look at the types of log files it generates: