You need to open the command prompt and run command: vxdg –list
All the DG’s which are in imported state – they are online
Now to check the information about the DG
Vxdg –gdgname dginfo
This will list the information about the DG along with the volume name and disk list in the dg
You can run another command which can produce detailed information about the Veritas DG
Tips: As best practice you must use same storage hyper size to create or to expand a volume.