I've had SureBackup disabled for a while, partly from moving things around and partly because the virtual lab was on an ESXi 5.5 host when I had some 6 hosts. I've since moved the virtual lab to two different ESXi 6 hosts and re-enabled the job. It runs (fails, but only on two machines) but I've found that on both hosts, Veeam ONE starts triggering a lot of alerts during the job. The alerts are datastore write latency, VM total disk latency, or host disk SCSI aborts. I never had that happen when the lab was on a 5.5 host. The application group is two DC's and a DHCP server, and the job was set to only test two machines at once - I've reduced that to one for tonight. I know the SureBackup job is using host resources, but should it be hitting the datastore so hard?