(this means: rtl8139 as nic and lsi as hardware controller)
XP & 2003 ISO E1000 drivers are missing or do not work with Qemu
(source: https://pve.proxmox.com/wiki/Windows_2003_guest_best_practices)
(source: https://pve.proxmox.com/wiki/Windows_XP_Guest_Notes)
The lsi SCSI controller was the default SCSI controller until recently and works with Win2003.
(NB: An IDE controller is still selected during installation for these OSes)
The aim is to provide an out-of-the box besser experience when using the Create Wizard.
NB: we have a distinct OS type between wxp and w2k3 in QemuServer.pm but since they
use the same defaults we can still wxp for both of those.
instead of setting virtio-scsi for all newly created VMs, pass the
OS Optimal SCSI Controller to pveQemuCreateWizard which will
add it as an hidden paramater just before POSTing the wizard data
to the API.
