We have a utility called CTSDEU that will erase PHYSICAL volumes. It will not bulk erase IBM virtual volumes. You will to consider the physical backstore volumes also before you return the IBM VTS system. These volumes also have your data on them. We recommend contacting IBM since CA-TLMS does not have access to the backstore volumes to erase. I did find a Secure Data Erase feature from IBM, but I would feel more comfortable if they gave you their recommendation to erase all of the data.