Hi Spencer, I could reproduce the EINVAL on the command line: srvl022:/storage# touch /storage/x srvl022:/storage# chown 110:140 /storage/x chown: changing ownership of `/storage/x': Invalid argument 110 and 140 are not valid UIDs and GIDs on the NFS server. They are defined in the local passwd/group files on the libvirt server only. After defining the user and group on the NFS server the error message is gone. Obviously NFSv4 is a little bit picky about remote root users trying to change the ownership of files. This seems to break qemuSecurityDACSetOwnership() in qemu_security_dac.c, giving me the "unable to set security context" message. Do you think it would be possible to introduce a configure option '--with-dac=no'? Regards Harri -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list