Original message: https://www.redhat.com/archives/libvirt-users/2011-June/msg00017.html Best to post libguestfs and virt-tools questions on one of these two mailing lists: http://www.redhat.com/mailman/listinfo/libguestfs https://www.redhat.com/mailman/listinfo/virt-tools-list The answer is: yes, virt-resize understands ext4. I can't really say more since you don't say what virt-resize command line you are actually using. But if I were a gambling man, I'd say it's because you've forgotten: --lv-expand /dev/vg_custserv/lv_home (or whichever filesystem you want to resize). If that's not the problem, please post a full description of what you're trying to do, including the virt-resize command, the full output of the command, and the output of 'virt-filesystems --all --long' before and after the resize. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://et.redhat.com/~rjones/virt-df/