app/lib/backends/opennebula/templates/compute_disk.erb
<% data[:instances].each do |storagelink| %>
DISK = [
IMAGE_ID = "<%= storagelink.target_id %>"
<% if storagelink['occi.storagelink.deviceid'].present? %>
,TARGET = "<%= storagelink['occi.storagelink.deviceid'].gsub('/dev/', '') %>"
<% else %>
,DEV_PREFIX = "vd"
<% end %>
]
<% end %>