Api-ref:Add target volume preconditions for backup restore.
the status of volume must be available.
the size of the volume must be equal to or greater than
the backup size.
@@ -182,6 +182,10 @@ Restores a Block Storage backup to an existing or new Block Storage volume.
The name parameter will work only if a new volume is created.
If UUID is specified, the backup will be restored to the specified volume.
+The specified volume has the following requirements:
+
+ * the specified volume status is ``available``.
+ * the size of specified volume must be equal to or greater than the size of backup.
If no existing volume UUID is provided, the backup will be restored to a
new volume matching the size and name of the originally backed up volume.
