I just started trying out the free version of veeam, for vmware. I've run the veeamzip on a couple vm's and so far it seems to work.
On this other vm though, I'm running into the error: "Production datastore 'backup' is getting low on free space (305.0 MB left), and may run out of free disk space completely due to open snapshots. Error: Insufficient free disk space on production datastore 'backup'."
Basically, on my vmware host there are 3 internal hard drives. All my other vm's use 2 of them, but the vm I'm trying to back up is as follows:
VM -> primary hard disk on one of the two disks that other vm's (with successful backups) are on.
VM -> extra disk - for extra mount point in linux, and an extra disk - for nfs shares and samba shares ---> these are both stored on a datastore of their own that is fully used (thick provisioned disks) so it has the above 305MB free).
But, the Settings for the two extra disks, in vmware, have the checkbox "Independent" checked. This says "Independent disks are not affected by snapshots". So I'm not sure why the veeam backup is failing without free space, as these two extra disks shouldn't be affected by snapshots, and the vm and it's primary hard disk is on a datastore with plenty of free space (>800GB).