An Oracle database user is required to log in to the database and perform SnapManager operations. You must create this user with the sysdba privilege if a user with the sysdba privilege does not exist for the target database.
SnapManager can use any Oracle user with the sysdba privilege that exists for the target database. For example, SnapManager can use the default sys user. However, even if the user exists, you can create a new user for the target database and assign the sysdba privilege.
You can also use the OS authentication method wherein the operating system (OS) allows the Oracle database to use the credentials that are maintained by the OS to authenticate users to log in to the database and perform SnapManager operations. If you are authenticated by the OS, you can connect to the Oracle database without specifying a user name or password.