Originally posted by prav_saras
If I give startup then it will start.But I need that whenever I start the system ,I can login system/manager.
If the service is 'automatic', then it will start accordingly, unless any errors occur, for which you can check the alert log.

On the other hand, I think you need to give some time (after switching on the system), before the system makes the database available. (start instance, mount database, open database).

HTH.