HP 3PAR Operating System Software - Manual (Page 139)

4. (Optional) Select to remove volumes and descendents without active VLUNs, associated with
inactive VLUNs, and from volume sets.
When the volumes to be removed involve active VLUNs, clicking the checkbox will cause the
Unexport Virtual Volume confirmation dialog to appear.
If you cancel the Unexport Virtual Volume dialog, the checkbox on the Remove Virtual Volume
dialog will be unchecked. If you click OK on the Unexport Virtual Volume dialog, there will
be a second warning message.
Removing Virtual Volumes 139