The optional bus attribute specifies the type of disk device to emulate;
possible values are driver specific, with typical values being "ide", "scsi",
"virtio", "xen", "usb", "sata", or "sd" "sd" since 1.1.2. If omitted, the bus
type is inferred from the style of the device name (e.g. a device named 'sda'
will typically be exported using a SCSI bus).
https://libvirt.org/formatdomain.html#elementsDisks
The optional bus attribute specifies the type of disk device to emulate; possible values are driver specific, with typical values being "ide", "scsi", "virtio", "xen", "usb", "sata", or "sd" "sd" since 1.1.2. If omitted, the bus type is inferred from the style of the device name (e.g. a device named 'sda' will typically be exported using a SCSI bus). https://libvirt.org/formatdomain.html#elementsDisks