ASA Database Administration Guide
  The Database Server
    The database server
      Database server options

-y server option

Function 

Run as a Windows service.

Syntax 

{ dbsrv9 | dbeng9 } -y ...

Applies to 

Windows 95/98/Me

Description 

If the server registered as a Windows service, it continues to operate whether users log on or off, and shutdown commands are ignored.