If an Adabas system is started in READONLY mode, this will be shown with a console MESSAGE (ADAN01 xxxxx R E A D O N L Y = YES).
If an Adabas system is started in UTIONLY mode, an appropriate message is missing.
UTIONLY should get acknowledged the same way as READONLY!
A clear message helps DBAs by assuring them of the current situation. Anything else might cause confusion, esp. since this is often needed in exceptional circumstances!