To get resize to work with XenServer (and XCP) you need to: Establish a root trust between all hypervisor nodes of your deployment: You can do so by generating an ssh key-pair (with ssh-keygen) and then ensuring that each of your dom0's authorized_keys file (located in /root/.ssh/authorized_keys) contains the public key fingerprint (located in /root/.ssh/id_rsa.pub). Provide an /images mount point to your hypervisor's dom0: Dom0 space is a premium so creating a directory in dom0 is kind of dangerous, and almost surely bound to fail especially when resizing big servers. The least you can do is to symlink /images to your local storage SR. The instructions below work for an English-based installation of XenServer (and XCP) and in the case of ext3 based SR (with which the resize functionality is known to work correctly). # LOCAL_SR=$(xe sr-list name-label="Local storage" --minimal) # IMG_DIR="/var/run/sr-mount/$LOCAL_SR/images" # mkdir -p "$IMG_DIR" # ln -s "$IMG_DIR" /images