Viewing the used capacity of a Thin Image pool
Open the Pools window.
In Hitachi Command Suite:
On the Resources tab, click Storage Systems, and then expand All Storage Systems.
Expand the target storage system, right-click DP Pools, and then select System GUI.
In Storage Navigator:
Click Storage Systems, and then expand the Storage Systems tree.
Click Pools.
Review the Used Pool Capacity of pools listed in the Pools table.