content_image/1012296.jpg
Note:  If your DRP has a total capacity below 50 TB, you might need to decrease the extent size from the default for DRP (which is 4 GB) to 1 GB for optimal space savings. 

The main purpose of DRPs is to be a fast and efficient container for volumes with data reduction capability. DRPs can also contain fully allocated volumes. 

To create a volume on a DRP, browse to Volumes →  Volumes ,  and click Create Volumes . 

Figure 9-12 shows the Create Volumes window. Under the Capacity Savings menu, you can select None, Thin Provisioned and Compressed. If Compressed or Thin Provisioned are selected, the Deduplicated option also becomes available and can be selected. 

<img src='content_image/1012296.jpg'>

## Capacity monitoring 

Figure 9-13 on page 456 shows the Volumes window with a list of volumes, which are created in the DRP pool. Only Capacity (which is virtual capacity, available to a host) is shown. Real capacity, Used capacity, and Compression savings show Not Applicable for volumes with capacity savings. Only fully allocated volumes display those parameters. 

Note:  When using and reviewing Volumes in DRPs, be aware that there is no volume-copy level reporting on used capacity. 

