Lenovo ThinkVantage Rescue and Recovery 4.3 (Deployment Guide) - Manual (Page 58)

4. A message prompts to create the rescue media when performing a backup, if
the Rescue and Recovery program detects that no rescue medium has been
created before.
For more information about the Create Rescue Media function, consult its Help
information system by pressing F1 after launching the Rescue and Recovery 4.3
program.
50 Rescue and Recovery 4.3 Deployment Guide