anchor.diff:      gpadmin@gp6master$ pxf cluster sync
       ```
    
  -6. Start PXF on each Greenplum Database 6 segment host as described in [Starting PXF](../../pxf/5-15/cfginitstart_pxf.html#start_pxf).
  +6. Start PXF on each Greenplum Database 6 segment host:
  +
  +    ``` shell
  +    gpadmin@gp6master pxf cluster start
  +    ```
   
   7. Verify the migration by testing that each PXF external table can access the referenced data store.
   
  
positive.code: 
  2. Identify and note the version number of your Greenplum Database 6 installation.
  
  2. Identify the version of PXF installed on your Greenplum 6 hosts:
  
      ``` shell
      gpadmin@gp6master$ pxf version
      ```
  
  3. If the version of PXF installed in your Greenplum 5 installation is newer than the version of PXF installed in your Greenplum 6 cluster, install the PXF distribution on your Greenplum 6 hosts as described in [Installing PXF](../../pxf/5-15/installing_pxf.html). Be sure to install a version of PXF that is the same, or newer, than the version of PXF installed in your Greenplum 5 cluster.
  
  2. If you installed Greenplum Database 6 on a new set of hosts, copy the `$PXF_CONF` directory from your Greenplum 5 installation to the master node. Consider copying the directory to the same file system location at which it resided in the 5 cluster. For example, if `PXF_CONF=/usr/local/greenplum-pxf`:
  
  
negative.code: title: Migrating PXF from Greenplum 5
  ---
  
  If you are using PXF in your Greenplum Database 5 installation, upgrade Greenplum Database to version **5.21.2** or newer before you migrate PXF to Greenplum Database **6.10.1** or newer.
  
  The PXF Greenplum Database 5 to 6 migration procedure has two parts. You perform one PXF procedure in your Greenplum Database 5 installation, then install, configure, and migrate data to Greenplum 6:
  
  