text: In addition, the**lsvdisk**output shows more fields:**volume_id**,**volume_name**, and**function**, 
  which help to identify the individual VDisks that make up a HyperSwap volume. This 
  information is used by the GUI to provide views that reflect the client’s view of the*HyperSwap*
  volume and its site-dependent copies, as opposed to the “low-level” VDisks and VDisk 
  Change Volumes. 