Comment 4 for bug 1916843

We are running into this same problem in our deployments with vmware.
get_backup_device() blocks waiting for a temporary volume to be created on the backend over rpc.
With vmware driver, it boils doing to doing a full clone of the original volume, which can take hours to do for large volumes full of data. We have many customers that have 200G and even 2TB volumes. Every backup fails due to this rpc timeout.