# virsh pool-define-as > Create a configuration file in `/etc/libvirt/storage` for a persistent virtual machine storage pool from the provided arguments. > See also: `virsh`, `virsh-pool-build`, `virsh-pool-start`. > More information: . - Create the configuration file for a storage pool called pool_name using `/var/vms` as the underlying storage system: `virsh pool-define-as --name {{pool_name}} --type {{dir}} --target {{/var/vms}}`