diff --git a/plugins/backup/nas/src/main/java/org/apache/cloudstack/backup/NASBackupProvider.java b/plugins/backup/nas/src/main/java/org/apache/cloudstack/backup/NASBackupProvider.java
index 0e6b3122a3a..83c55f62512 100644
--- a/plugins/backup/nas/src/main/java/org/apache/cloudstack/backup/NASBackupProvider.java
+++ b/plugins/backup/nas/src/main/java/org/apache/cloudstack/backup/NASBackupProvider.java
@@ -46,6 +46,7 @@ import org.apache.logging.log4j.LogManager;
 import javax.inject.Inject;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.Date;
 import java.util.List;
 import java.util.Map;
@@ -157,7 +158,13 @@ public class NASBackupProvider extends AdapterBase implements BackupProvider, Co
             backup.setType("FULL");
             backup.setDate(new Date());
             backup.setSize(answer.getSize());
-            backup.setProtectedSize(answer.getVirtualSize());
+            Long virtualSize = 0L;
+            for (final Volume volume: volumeDao.findByInstance(vm.getId())) {
+                if (Volume.State.Ready.equals(volume.getState())) {
+                    virtualSize += volume.getSize();
+                }
+            }
+            backup.setProtectedSize(virtualSize);
             backup.setStatus(Backup.Status.BackedUp);
             backup.setBackupOfferingId(vm.getBackupOfferingId());
             backup.setAccountId(vm.getAccountId());
@@ -173,6 +180,10 @@ public class NASBackupProvider extends AdapterBase implements BackupProvider, Co
     public boolean restoreVMFromBackup(VirtualMachine vm, Backup backup) {
         final Long zoneId = backup.getZoneId();
 
+        List<VolumeVO> volumes = volumeDao.findByInstance(vm.getId());
+        volumes.removeIf(x -> !Volume.State.Ready.equals(x.getState()));
+        volumes.sort(Comparator.comparing(VolumeVO::getDeviceId));
+
         LOG.debug("Restoring vm " + vm.getUuid() + "from backup " + backup.getUuid() + " on the NAS Backup Provider");
 
         // Find where the VM was last running
@@ -192,6 +203,7 @@ public class NASBackupProvider extends AdapterBase implements BackupProvider, Co
         final Long zoneId = backup.getZoneId();
 
         // TODO: Find volume from backup volumes
+        volume.getDeviceId(); // restore by device ID
 
         VolumeVO restoredVolume = new VolumeVO(Volume.Type.DATADISK, null, backup.getZoneId(),
                 backup.getDomainId(), backup.getAccountId(), 0, null,
diff --git a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtTakeBackupCommandWrapper.java b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtTakeBackupCommandWrapper.java
index 30f530ffd8a..d228c48296a 100644
--- a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtTakeBackupCommandWrapper.java
+++ b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtTakeBackupCommandWrapper.java
@@ -28,10 +28,8 @@ import com.cloud.utils.script.Script;
 import org.apache.cloudstack.backup.BackupAnswer;
 import org.apache.cloudstack.backup.TakeBackupCommand;
 
-import java.io.File;
-import java.net.MalformedURLException;
-import java.net.URL;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 @ResourceWrapper(handles = TakeBackupCommand.class)
@@ -64,8 +62,14 @@ public class LibvirtTakeBackupCommandWrapper extends CommandWrapper<TakeBackupCo
             return new BackupAnswer(command, false, result.second());
         }
 
-        BackupAnswer answer = new BackupAnswer(command, true, null);
-        answer.setSize(Long.parseLong(result.second().trim()));
+        List<String> outputLines = Arrays.asList(result.second().trim().split("\n"));
+        Long backupSize = 0L;
+        if (outputLines.size() > 0) {
+            backupSize = Long.parseLong(outputLines.get(outputLines.size()-1).trim());
+        }
+
+        BackupAnswer answer = new BackupAnswer(command, true, result.second());
+        answer.setSize(backupSize);
         return answer;
     }
 }
diff --git a/scripts/vm/hypervisor/kvm/nasbackup.sh b/scripts/vm/hypervisor/kvm/nasbackup.sh
index 5c6cbc5476a..ae21255dc78 100755
--- a/scripts/vm/hypervisor/kvm/nasbackup.sh
+++ b/scripts/vm/hypervisor/kvm/nasbackup.sh
@@ -40,23 +40,29 @@ backup_vm() {
   mount -t ${NAS_TYPE} ${NAS_ADDRESS} ${mount_point} $([[ ! -z "${MOUNT_OPTS}" ]] && echo -o ${MOUNT_OPTS})
   mkdir -p $dest
 
+  deviceId=0
+  name="root"
   echo "<domainbackup mode='push'><disks>" > $dest/backup.xml
   for disk in $(virsh -c qemu:///system domblklist $vm --details 2>/dev/null | awk '/disk/{print$3}'); do
-    echo "<disk name='$disk' backup='yes' type='file' backupmode='full'><driver type='qcow2'/><target file='$dest/$disk' /></disk>" >> $dest/backup.xml
+    echo "<disk name='$disk' backup='yes' type='file' backupmode='full'><driver type='qcow2'/><target file='$dest/$deviceId.$name.$disk' /></disk>" >> $dest/backup.xml
+    deviceId=$((devideId+1))
+    name="datadisk"
   done
   echo "</disks></domainbackup>" >> $dest/backup.xml
 
   virsh -c qemu:///system backup-begin --domain $vm --backupxml $dest/backup.xml > /dev/null 2>/dev/null
   virsh -c qemu:///system dumpxml $vm > $dest/domain-$vm.xml 2>/dev/null
 
-  until virsh -c qemu:///system domjobinfo $vm --completed 2>/dev/null | grep "Completed" > /dev/null; do
+  until virsh -c qemu:///system domjobinfo $vm --completed --keep-completed 2>/dev/null | grep "Completed" > /dev/null; do
     sleep 5
   done
   rm -f $dest/backup.xml
-
-  # Print directory size
   sync
+
+  # Print statistics
+  virsh -c qemu:///system domjobinfo $vm --completed
   du -sb $dest | cut -f1
+
   umount $mount_point
   rmdir $mount_point
 }