Failed to mount one or more virtual disk images:
A number of our esxi 5.0 virtual machines have started checking up the error message:
V-79-57344-38721 - Failed to mount one or more virtual disk images:
When performing incremental backups, full backups have been fine. I've run backups without Advanced File Open run jobs to backup just the affected virtual machines, rebooted everything from VMs to hosts to the backup exec server. Agent based backups of the servers in question are fine and the backups where working fine a couple of weeks ago any suggestions anyone?