Does anybody know if it's possible to discover if a Oracle Database is configured as "standby" ? We use 10.01 / latest Patches and CP
Discovery of StandBy DB isn't supported at the moment. Since the instance in standby mode not answering to SQL queries the only way to discover it is by tracking the running process.
Try to use HostResources and Application Job. It most probably will create the instance, but not too deep.
You are more then welcome to log enhancement request for discovery DB in standby mode. To do this, please create new incident with support.