anchor.diff:  <%@ page import="tachyon.StorageDirId" %>
   <%@ page import="tachyon.StorageLevelAlias" %>
   <%@ page import="tachyon.util.*" %>
  -<%@ page import="tachyon.web.*" %>
  -<%@ page import="tachyon.worker.tiered.StorageDir" %>
  +<%@ page import="tachyon.web.WebInterfaceWorkerGeneralServlet.UiStorageDir" %>
   
   <html>
   <head>
  
positive.code:                 </tr>
                  <% List<Long> capacityBytesOnTiers = (List<Long>) request.getAttribute("capacityBytesOnTiers"); %>
                  <% List<Long> usedBytesOnTiers = (List<Long>) request.getAttribute("usedBytesOnTiers"); %>
                  <% for (int i = 0; i < StorageLevelAlias.SIZE; i ++) { %>
                  <tr>
                    <th><%= StorageLevelAlias.values()[i].name() %> Capacity / Used</th>
                    <th>
  
negative.code:                 <th>Space Usage</th>
                </thead>
                <tbody>
                  <% for (UiStorageDir dir : ((List<UiStorageDir>) request.getAttribute("storageDirs"))) { %>
                    <tr>
                      <th><%= StorageDirId.getStorageLevelAlias(dir.getStorageDirId()) %></th>
                      <th><%= dir.getDirPath() %></th>
  