Chapter 7. Volumes 265
7.2.3  Capacity savings option
When the Basic or Mirrored method of volume creation is sued, the GUI provides a Capacity 
Savings option, which enables altering the volume provisioning parameters without the use of 
the Custom volume provisioning method. You can select Thin-provisioned or Compressed 
from the drop-down menu, as shown in Figure 7-16, to create thin-provisioned or compressed 
volumes.
Figure 7-16   Volume Creation with Capacity Saving option 
When a thin-provisioned or compressed volume is defined in a data reduction pool, the 
Deduplicated option becomes available. Select this option to enable deduplication of the 
volume.
7.3  Creating custom volumes
The Create Volumes window also enables Custom volume creation that expands the set of 
options for volume creation available to the administrator.
The Custom menu consists of several panes:
/SM590000Volume Location: Mandatory, defines the number of volume copies, Pools to be used, and 
I/O group preferences.
/SM590000Volume Details: Mandatory, defines the Capacity savings option.
/SM590000Thin Provisioning: Enables configuration of Thin Provisioning settings if this capacity 
saving option is selected.
/SM590000Compressed: Enables configuration of Compression settings if this capacity saving option 
is selected.
/SM590000General: For configuring for Cache mode and Formatting.
/SM590000Summary
Work through these panes to customize your Custom volume as wanted, and then commit 
these changes by clicking Create.
Note: Consider the compression guidelines in Chapter 10, “Advanced features for storage 
efficiency” on page 403 before creating the first compressed volume copy on a system.