# File lib/client/vm_api.rb, line 47
    def add_volume(vm_id, opts={})
      search = opts[:search] || ("datacenter=%s" % current_datacenter.name)
      storage_domain_id = opts[:storage_domain] || storagedomains(:role => 'data', :search => search).first.id
      http_post("/vms/%s/disks" % vm_id, OVIRT::Volume.to_xml(storage_domain_id, opts))
    end