I am a bit confused....please help!

If I don't replicate system dbs, then server B does not have system dbs at all, so how will the server B up and run when the server A goes down?

My second question: If I need to have some of login accounts from server A to be on the server B, as you mentioned above, we don't replicate the master database, so how would I get some of the login accounts from server A to server B? Should I replicate some of the tables in the master db that contain those login accounts?

Thanks in advance for your response!

-Whitebelt