On Sun, Dec 19, 2010 at 12:12:58PM +0100, Olivier Hault wrote: We don't support this right now. However it is certainly something we would support. libguestfs implements features by running already available Linux tools. eg. "guestfs_zerofree" is implemented by running the "zerofree" command. Therefore the concrete steps to supporting this are: (1) What commands exist already in Fedora/Debian to defrag the different types of filesystems? (vfat, ntfs, ext3, ...) (2) What open source Linux programs exist to do this which could be packaged for Fedora/Debian? (3) Begin the process of packaging (2) for Fedora and/or Debian: http://join.fedoraproject.org/ http://www.debian.org/devel/wnpp/ (4) Add the libguestfs wrapper for these commands. This step is generally very simple once (1)-(3) above have been sorted out. So that's what is needed, and any help you can give would be welcome. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v