My first job at DEC was installing VMS 2.0 on 11/780s. Standalone DSC was loaded from the 11/780 front end floppies IIRC. I think you can also generate it to bootable RL and RK06/7 disks from VMS 2 or 3. I don't know if a later versions had it. DSC was the most common backup software on 2.x Bill