To resize servers with XenServer and XCP, you must: Establish a root trust between all hypervisor nodes of your deployment: To do so, generate an ssh key-pair with the ssh-keygen command. Ensure 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 the dom0 for your hypervisor: Dom0 space is at a premium so creating a directory in dom0 is potentially dangerous and likely to fail especially when you resize large servers. The least you can do is to symlink /images to your local storage SR. The following instructions 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