Hi, It's not supported because you have a PCI device attached, so memory snapshot aren't supported, because this cause crash on resuming it while the PCI device had another context in the meantime. Offline means the VM will be shutdown, snap then started. edit: "In memory" is like a live migration, so not compatible with PCI passthrough

There's no built-in feature to backup changes made to dom0 outside changes made via XAPI, so configuration as code is probably the best option here.

This will come for some vendors (with their own APIs). We do not want to use SSH for that though (XO never use SSH).