text: It is not recommended to use “DRP above DRP”, when the back-end system belongs to the 
  IBM Spectrum Virtualize family. With this configuration, implement fully allocated MDisks on 
  the back-end and configure space efficiency features on IBM Storwize V7000 with DRPs. 
  
  The IBM Storwize V7000 storage administrator can monitor space use usage on 
  thin-provisioned MDisks by using one of the following methods: 
  
  (cid:2) GUI Dashboard, as shown in Figure 10-19. 