diff --git a/deployment_scripts/puppet/modules/plugin_purestorage_cinder/manifests/compute.pp b/deployment_scripts/puppet/modules/plugin_purestorage_cinder/manifests/compute.pp
index 4e2e6ef..eeb9854 100755
--- a/deployment_scripts/puppet/modules/plugin_purestorage_cinder/manifests/compute.pp
+++ b/deployment_scripts/puppet/modules/plugin_purestorage_cinder/manifests/compute.pp
@@ -28,7 +28,8 @@ class plugin_purestorage_cinder::compute {
     hasrestart => true,
   }
 
-  nova_config { 'libvirt/iscsi_use_multipath': value =>  $plugin_settings['pure_nova_multipath'] }
+  nova_config { 'libvirt/iscsi_use_multipath': value =>  $plugin_settings['pure_nova_multipath'],
+                'libvirt/hw_disk_discard': value => 'unmap' }
 
   Nova_config<||> ~> Service['nova-compute']