Hi there, Thanks for the advice and will try this tomorrow and let you know Regards, Jonathan Wood <http://www.jwservices.co.nz/> www.jwservices.co.nz jonathan(a)jwservices.co.nz From: wlug-bounces(a)list.waikato.ac.nz [mailto:wlug-bounces(a)list.waikato.ac.nz] On Behalf Of Daniel Lawson Sent: Wednesday, 20 November 2013 7:57 p.m. To: Waikato Linux Users Group Subject: Re: [wlug] Xen pci pass through /data/domains/windows/start_pci1.sh 0000:06.2.0 modprobe xen-pciback 'hide=(0000:06.2.0)' xl pci-assignable-add 06.2.0 ... Binding 0000:06.2.0 to pciback /data/domains/windows/start_pci1.sh: line 17: echo: write error: Invalid argument /data/domains/windows/start_pci1.sh: line 18: echo: write error: No such device pci-assignable-add: malformed BDF specification "06.2.0" That last error, and this page: http://wiki.xen.org/wiki/Bus:Device.Function_(BDF)_Notation suggest that the parameter you pass into 'xl pci-assignable-add' should be in the format "06:02.0" instead of "06.2.0". The other errors might relate to poorly formatted PCI IDs as well: try '0000:06:02.0' ? However, I have no idea if that's relevant. Haven't used xen in a long time... I also found this link while browsing: http://wiki.xen.org/wiki/Bind_lib.bash_:_A_script_that_makes_pciback_with_mo dules_easier_to_use. Might help?