On Thu, May 14, 2015 at 11:07:17AM +0800, fu lirong wrote: supermin only recognizes programs which are installed by the package manager, ie. installed through apt-get on Debian/Ubuntu. While it's possible to add arbitrary files to the appliance (see the supermin manual page[1] for details), since Debian has mdadm already packaged it's better to get it from there. Rich. [1] http://libguestfs.org/supermin.1.html#SUPERMIN-APPLIANCES -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html